MODEL ^ OCTOBER 1983 $2.50
BUILDER volume 13, number 141 ICD 08545
# Beehive R/C Model Aircraft's KLOUD KING in review Φ Stan Wilson's semi-scale CITABRIA for electric power # Walt Musciano's RUSSIAN MISSILE BOAT, Part 2 # Davey System's POW'RTOW and RETRIEVER in review # Leon Shulman's Nats winning WEDGY old timer Available in 30% Sport Scale . . .in Full Color Complete Kit Concept Like all Byron Originals kits, our new Christen Eagle is designed, . .. and in a Lavish, Complete Kit Concept. manufactured and packaged with our "Complete Kit Concept" in mind. This deluxe package includes every item needed to complete the model, except engine, radio, paint and glue. Exclusive Modular Construction Thanks to our exclusive Byro-Foam modular construction, building the Eagle is both a fascinating and rewarding experience. Twenty-five years of manufacturing experience, plus our special injection molding process, assures warp-free wings, fuselage and control surfaces. Each and every foam component, with its smooth yet tough and resilient surface, needs only a light sanding prior to covering. Minimal shaping required. Authentic Flight Performance Value and ease of assembly are only part of the Eagle story. Spectacular aerobatic performance is the rest. The Eagle from Byron Originals promises the kind of unlimited performance one has to experience to fully appreciate. But perhaps the thing that makes our Christen Eagle really different is the fact that it's a Byron Originals kit - the latest addition to the finest line of RC kits available. The Eagles are indeed here! Experience one today. New Quadra Power Package From Byron Originals! More than a year of factory applications have proven this to be the perfect power system for our Pitts and Christen Eagle. The light, yet rugged nylon engine mount provides a quick and positive means of securing the Quadra engine to firewall. It’s pre-drilled and adjusted to automatically position engine beneath the Pitts and Eagle cowling Power Package also includes special prop/spinner adapter bolt. 18x8 maple prop. 3% ” spinner assembly. 9 /6 4 " ball driver. Loctite. and all required fasteners.
Retail Value Your Cost Christen Eagle II - $299.95 $254.96 & $ 1 2 .5 0 ship. Fiberglassing kit - 53.63 45.59 & 2 .6 5 ship. Deluxe decal kit · 50.00 42.50 & 1.65 ship. -# #» (Color feather paint scheme) Byron Originals Quadra Power Package with engine 216.50 184.03 & 2 .6 Sship. Power Package less engine 56.50 48.03 &i .65ship. Send $2.00 for detailed Eagle info packet. ^SfteeifiCATTOftåsL-^— * L e n g th ...... 8 " from firewall mounting SEND TO: Byron Originals. P.O. Box 279, Ida Grove, Iowa 51445 to spinner backplate. Adjusts to 8 ’Λ " W idth .5 % " Engine displacem ent...... 2 cu. in. Ph: 712-364-3165 Telex 439012 IDAG Total weight...4V940T RPM on 18x8 prop . Approx. 7700 Ä “Cloud Satellite City P.O. Box 836 Simi, CA 93062 Attn: Bob & Bill Hunter D ancers” Dear Bob and Bill: We’ve all used “HOT STUFF" and SUPER T for years on our show and individual models. Being long time HOT STUFFERS we thought we knew all the tricks until we saw VIDEO-TIPS 1 & 2. These tapes really opened our eyes to the many ways a modeler can use “HOT STUFF,” SUPER T and HOT SHOT as well to eliminate lots of unnecessary work. We just wanted to say thanks for your great products and your caring enough to share your knowhow with the modeler. You can consider the Cloud Dancers 100% HOT STUFF. P.S.: It's nice to know that your products are MADE IN AMERICA. Keep up the good work. Sincerely, Cloud Dancer R/C Show Team, Kissimmee, FLA.
Left to right: Tom Veloskey, Johny Davis, Jay Ward, Don Muddiman, and Tom Veloskey, Jr. HS-3 3 OZ 3L95 ------“ MODELER TO MODELER”- HST-4 ECONOMY "HOT SHOT" 2 0Z. 9.95 HOT STUFF- VIDEO-TIPS 1 AND new#2
HS-4 ECONOMY 2 0Z. 9.95
—TWO— m o d e l BUILDING S STATE-OF-THE-ART INSTANT GLUES ONE HOUR VHS CASSETTES •CLUB MEETINGS AS USED BY WORLD CHAMPIONS • HOBBY SHOPS ☆ HANNO PRETTNER • DISTRIBUTORS ☆ LES MCDONALD • ORGANIZATIONS FAI PATTERN WORLD CHAMP C/L STUNT WORLD CHAMP • HOME VIEWING ☆ WOLFGANG MATT ☆ BOB HUNT FAI PATTERN WORLD CHAMP C/L STUNT WORLD CHAMP CALL OR WRITE FOR PAST PAST VIDEO-TIPS DETAILS P.O. BOX 836, SIMI, CA 93062 · (805) 522-0062 OCTOBER
MODEL 1983 BUILDER volume 13, number 141 621 West Nineteenth St., Box 10335, Costa Mesa, CA 92627-0132 Phone: (714) 645-8830
STAFF EDITOR/PUBLISHER TABLE OF CONTENTS Wm. C Northrop, Jr.
GENERAL MANAGER FEATURES Anita Northrop ASSISTANT GENERAL MANAGER W O R K B E N C H , Bill Northrop...... 6 Dawn Johnson O VER THE C O U N T E R ...... 7 PRODUCTION MANAGER Bill Forrey FUEL LINES, loe Klause...... 10 PRODUCTION ARTIST H O W T O FLY PATTER N, Dick Hanson...... 14 Howard Millman
ELECTRIC POWERED AEROBATICS, Larry jolly...... 15 DRAWINGS BY ELECTRIC POWER, Mitch Poling...... 16 AI Patterson R/C SOARING, BillForrey...... 18 ACCOUNTING DEPT. MANAGER Michael Whitney DSC POW ’RTOW & RETRIEVER IN REVIEW, BillForrey...... 22 SUBSCRIPTIONS BEEHIVE'S KLOUD KING IN REVIEW, ai Tuttle...... 27 Jo Anne Glenn PLUG SPARKS, John Pond ...... 29 CONTRIBUTING EDITORS C H O PPER C H A T T E R , Ray Hostetler...... 34 Al Alman Eloy Marez BIG BIRD S, Al Alman...... 36 Jerry Dunlap Walt Mooney Bill Forrey Mitch Poling ELECTRONICS CORNER, EloyMarez...... 38 Bill Hannan John Pond R /C C AR S, Dan Rutherford ...... 40 Dick Hanson Fernando Ramos Mike Hazel R /C BO A TS , Jerry Dunlap ...... 42 Dan Rutherford Ray Hostetler John Smith IN D O O R , Ken Johnson...... 46 Ken Johnson Bob Stálic k IN D O O R WEEK AT WESTBADEN, Jose Tellez...... 52 Joe Klause H A N N A N ’S H A N G A R , Bill Hannan...... 56 ADVERTISING FREE F LIG H T, Bobstalick...... 58 REPRESENTATIVES Bill Northrop Home Office, Costa Mesa AI Novotnik SCALE VIEWS 4 Beverly PI., Norwalk, CT 06850 Bus. Phone (203) 847-7478
CZECH AVIA B-534 SERIES II, Peter Westburg ...... 44 MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC.. 621 West 19th St.. Box 10335, Costa Mesa, California 92627-0132. Phone (714) 645-8830. CONSTRUCTION Subscriptions: $25.00 per year. $47.00 for two years. Single copies $2.50. Subscriptions Walt M usciano...... RUSSIAN MISSILE BOAT, PART 2, 11 outside the US (except APO & FPO) $32.00 CITABRIA FOR ELECTRIC POWER, Stan Wilson ...... 24 for one year only. All payments must be in US funds, drawn on a US bank. WEDGY O.T., LeonShulman ...... 32 Copyright 1983 by RCMB INC. All rights WHITE MONOPLANE, Don A ssel...... 49 reserved. Reproduction without permis sion prohibited. Change of address not ices must be received six weeks before date of issue that new address takes effect. Send old address with COVER: AI Tuttle's K lo u d K in g Old Timer (R/C assist) makes a majestic fly-by new: old label preferred. Post Office will for the camera. The model is manufactured by Beehive R/C Model Aircraft Co., not forward copies unless you pay extra P.O. Box 744, Layton, Utah, and is featured this month as a "Products In Use", postage. Duplicate issues c annot be sent. written, of course, by Mr. Tuttle. See page 27 for the whole story! Second class postage paid at Costa Mesa. California, and additional offices. 2 MODEL BUILDER G-SERIES ALL 1ΉΕ OPTIONS... Sportand competition flyers know our G-Series systems come equipped. Now G-Series systems have more control than ever, with the introduction P U IS S O M E olourS28senos NEW STANDARDS Sheathed in fuel proof cases, with cold- molded, resin gears and a maintenance-free, sealed potentiometer, these S28’s have set new standards for servo performance. You'll also get top performance from our With fully-adjustable. open gimbals, R7H receiver, a new, 7-channel version o f our mixing and a choice of dual or exponential popular R6F. Proven electronics and reliability rates, the amazing G-Series has what it takes make the R7H perfect to complete the G-Series to put the finishing touches on some very system. fancy flights. 5, 6 and 7-channel Futaba G-Series systems Convenience also figures into the G-Series are now available with S28 servos and the R7H design, which includes all-channel servo re receiver in the new 72MHz FCC approved fre versing as well as built-in stand, NiCad battery quencies, including a 53 MHz (FM) RF mod metering and antenna storage. ule-equipped version.
555 West Victoria StreetlCompton, CA 90220 Φ flipped Muuj C d S t o u f The classic Piper J-3 Cub has been America's favorite light plane for over 40 years. More than 20,000 of them were built between 1937 and 1947. By 1980, the number of airworthy J-3's in the U.S. had declined to approximately 3,600. One of these bears registration N32629 and is recognized worldwide as Hazel Sig’s Clipped Wing Cub. N32629 was manufactured in 1941 at the Piper factory in Lock Haven, Pennsylvania as a standard Piper J-3C-65 Cub, serial number 5498. Not much is known about the first years of its life. Hazel purchased the J-3 in January of 1968 and flew it in its standard form through the spring and summer of that year. In the fall, the Cub was flown to the Ottumwa, Iowa airport to be recovered. The airplane was completely disassembled and rebuilt. For better aerobatic performance 40" was clipped off the inboard (cabin) end of both the right and left wing panels. This was done in accordance with an FAA approved modification developed by aerobatic pilot Earl Reed in 1953 for his Cub. (Several other J-3 Cubs have also been modified using Earl's plans.) All the steel tubing framework in Hazel's Cub was sandblasted and primed with zinc chromate. The wooden parts were repaired or replaced as needed. The Continental A65-8F engine was completely overhauled and modified to produce 75 h.p. instead of its normal 65. Hazel, assisted by her husband Glen and plant superintendent Maxey Hester, then trucked the Cub parts back to Montezuma and put them in a basement room of the SIG factory. Over the winter months they recovered the airplane with grade "A" cotton and developed a striking blue and white sunburst paint scheme. In the spring of 1969, the Cub was trucked back to Ottumwa for reassembly. New cowlings, windshield, side windows, tailwheel, and metal prop were installed. Added touches like chromed cylinder heads and top shrouds, streamlined bungee covers, a personalized Cub bear emblem, radio gear, and a new interior made Hazel's Clipped Wing Cub one of a kind. The first test flight was made at the Ottumwa airport in the late summer of 1969 with Hazel at the controls. The Cub performed beautifully right from the start. Over the years, Hazel graduated to snappier and more powerful aircraft for her aerobatic flying, but none ever captured the attention and affections of modelers worldwide, as has the blue and white Cub. It’s a very special example of America's favorite airplane!
FIND OUT FOR YOURSELF WHY THE CUB IS SO POPULAR - BUILD ONE OF THESE 1/4-SCALE VERSIONS
1/4-SCALE PIPER J-3 CUB 1982 NATIONAL CHAMPION $ 174.95 KIT NO. RC-48 ENGINES: .60 TO 1.5 GLOW OR GAS RADIO REQUIREMENTS: WINGSPAN: 105 INCHES 4 CHANNEL SYSTEM WING AREA: APPROX. 1600 SQ. IN. WITH HEAVY-DUTY SERVOS WEIGHT: 14 - 16 LBS. Designed By MIKE GRETZ
ALL OF THE LEGENDARY FLIGHT CHARACTERISTICS OF THE FULL-SIZE CUBS ARE INHERITED BY THESE EASY-TO-BUILD REPLICAS
1/4-SCALE CLIPPED WING CUB $ 164.95 ENGINES: .60 TO 1.5 GLOW OR GAS KIT NO. RC-47 WINGSPAN: 86 INCHES RADIO REQUIREMENTS: WING AREA: APPROX. 1300 SQ. IN. 4 CHANNEL SYSTEM WEIGHT: 14 - 15 LBS. WITH HEAVY-DUTY SERVOS “ YOU CANT GO WRONG WITH A CUB!” Designed By MIKE GRETZ
See your dealer first! For direct orders, call toll free 1-800-247-5008. For mail orders, add $1.50 postage under $10.00. Over $10.00 postpaid. No C.O.D. Catalog 45 - $2.00. SIG MANUFACTURING CO., INC...... Montezuma, IA 50171
4 MODEL BUILDER ^siGir BUY FROM AUTHORIZED SIG DEALERS ^sidít
ALABAMA GRAND JUNCTION QUINCY COLPWATER MEW JERSEY LIMA VERMONT CULLMAN The Hobby Hut Qumcy Hobby Center Hobby Heaven EDISON Callahan Hobbies SW ANTON Chaney's R C Hobby Supples 112927 N Ave 3632 Maine 7 S Monroe Street C.J- R C SUPPLY 1229 E Elm St The Hobby Shop 601 5th St SW CONNECTICUT ROCKFORD PH 517-278-5894 2SO PUmtiekl Ave MANSFIELD RFD1 Rt 7 PH 205 734 2402 BRISTOL Rockford Hobbes. Inc DEARBORN PH (201) 90S 8660 Top FMe PH 802 5242715 HOMEWOOD Bristol Hobby Center. Inc. 615 N Prospect Street Joe's Hobby Center POMPTON PLAINS 15 N Mam VIRGINIA Homewood Toy 4 Hobby 641 Farmmgton Ave ROCKFORD 7845 Wyoming Ave Hobby Hut TOLEDO ANNANDALE 2830 S 18th St Bristol Ptaza Wmgs 4 Things PM: 313-933-6567 567 Route 23 The Hobby Stop Model Masters. Inc MOBILE PH: 583-7273 1122 Broadway EAST DETROIT PH 20 10 35 2077 4907 Summit Street 6920 Braddock Rd Dixie Hobby Crafts DAN8URY PH 815 963 7363 Joe's Hobby Center RAMSEY WAPAKONETA RICHMOND 3077 Dauphim Street The Hobby Center WAUKEGAN 17900 E 10 Mile Hi Way Hobby House Dad's Toy Shop The Hobby Center MONTGOMERY » 6 Mam St Lake County Hobbes PH 31 37 33 82 94 Route 17 129 E Auglaize St 1709 Wiflow Lawn Or Modelers Supply GLASTONBURY 3102 N SheodanRoad EAST LANSING RANDOLPH YOUNGSTOWN WASHINGTON (Mad Order Catalog Sales) Dams Hobbes PH 312-662-4544 Rider’s Hobby Shop Carrs Hobby Center Boardman Hobby Center BELLEVUE Box 7185 Fox Run Mall INDIANA 920 Trowbridge Road 500 Route 10 6820 Market Street RC Modet Shop PH 205 263-2634 NORWALK INDIANAPOLIS FARMINGTON PH 201 3664300 ZANESVILLE 1 4 0 » N E 21st St ALASKA At's Hobbes Wests«* Hobby Joe's Hobby Center. Inc RED BANK Thompson Radio Supptte* PH 747 9914 ANCHORAGE 54 Chestnut Mill Road 5235 Rockville Road 35203 Grand River Ave Hobbymaster». fnc 1 I0 S 6th Street KENT Anchorage House of Hobbies WATERFORO IOWA PH 313-477-6266 62 White Street OKLAHOMA Ken: Hobby 604 C Street 272 1043 Shoreline Craft CARROLL FARWELL WALLINGTON OKLAHOMA CITY 1313 W Meeker 4211 Spenard Road 5 Hayes St P 0 Box 222 Stereo Town,Kendall Co Lockwood Aero 4 Hobby Shop B ednjrz Senncenter Campbell's Hobby House PUYALLUP 3521 Mt View Drive PH 443 1458 201 West 4th Street 3060 N County Line Road RC Hobby Supplies 3500 N MacArthur Firgrove Model Supply 8225 Old Seward FLORIOA COUNCIL BLUFFS FLINT 356 Mam Ave TULSA 10611 136th St East ANCHORAGE BRADENTON Bud s Hobbes 4 Crafts Rider's Hobby Shop NEW MEXICO House of Hobtues PH 8 4 5 7675 Hobbycratt Inc Semaphore Hobby Center 133 W Broadway » 1 2 Corunna Road ALBUQUERQUE 6914 E Admiral Place SEATTLE 800 East Dimood Btvd 1838 14th Street West DES MOINES KALAMAZOO Valley Hobbies OREGON We ts ie r Supply Co Suite 136 CAPE CORAL Iowa Service Company Rider's Hobby Shop 4522 4th St N W CORVALLIS 178IB Aurora Ave N ARIZONA A 4 J Models Inc. 2706 Beaver Ave 3417 So Westnedge PH 505 345 9608 Trump's (OJ's) Hobbies TACOMA PHOENIX 1928 Oel Prado Btvd WATERLOO LAPEER CARLSBAD 1875 N W 9th St Bi«'s Hobby Town Exeter Mobb«es CAPE CORAL Bob s R C Supply P>pps Hobby 4 Toys The Schettiers PH 5 0 3 753 7540 14914 Pacific Ave 3285 E McDowell Rd Uncle Bob's Country Store 432 Ardmore 112 West NepressmgSt 1009 N Eighth St PENNSYLVANIA PM 206-5318111 PHOENIX Hobby Supply WATERLOO PONTIAC NEW YORK ARDMORE WALLA WALLA The Hobby Bench 4 7 » D S E 15th Ave Howard's Hobby Shop RC Hobbies BROOKLYN Ardmore Hobbies Harley's RC 19th Avenue 4 Northern PH 813-9450900 110 East 4th 921 Huron Brooklyn's Model Masters 19 A W oods«* Ave R ou t· 1. Bo· 277A PHOENIX JACKSONVILLE WATERLOO ROCHESTER 1307 Gravesend Neck Road BATH PH 5 0 9 5 2 *2 6 1 8 Hobby Bench Field'» Hobby Shop. Inc Les s Bicycle 4 Hobby Tracks«* Hobbies PH 212 339 9250 Traeh R C Hobtues WEST VIRGINIA Peradise Valley Mall 1096 Ontario Street 900 U P onte Rd 418 Mam Street BROOKLYN RO 1 Box 262 CHARLESTON 4550 E Cactus Rd LEESBURG KANSAS SAGINAW Watt's Hobby Shoo BATH Fountain Hobby Center SEOONA Top Value Hobby KANSAS CITY Tail's Hobby Shop 12 7909 5th Ave Dick Wetzel s Hobbies 200 W Washington St My Hobby Shop 2740 North Hwy 441 27 R C HOB8IES C 326 Fashion Square Malt PH 212-745-4991 514 E Mam St WISCONSIN Sm ith's Comer Fruit land Park Ptaza 5620 State Ave SAULT ST MARIE DEPEW PH 2158376681 MARSHFIELD PH 602 282 1290 MELBOURNE LIBERAL Pinnae* Hobby Shop Depew Hobby Center LANCASTER M«J Wisconsin Hobby Center TUCSON Ernie's Hobby Shop Miller * Bike 4 Hobby Shop 129 E P o rta « Aven 5866 Transit Road The Flight Box Northway Ma» Tucson Hobby Shop 631 ApoHo Btvd 105 E Seventh TAWAS CITY PH 684 5555 Lancaster Shopping Center 503 E Ives SI 4352 E Speedway MIAMI WICHITA Great Lakes Model 6 Mold Co ELMSFORO LANSDALE MENOMONIE ARKANSAS Crown Hobbes The Hobby Shop 412 Margo Street Andy's Hobby Shop Penn Valley Hobby Ctr True Value Hardware FAYETTEVILLE 7439 Coral Way 9S4 South Oliver TRAVERSE CITY 36 Mam Street 837 W Mam St 151? 9th Street Collier s Air Crafts MIAMI KENTUCKY Ray's Rad«yControi Shop KINGSTON LEHKWTON L Mart Shopomg Ctr 1610 Foxhunter Road Orange Blossom Hobbes. Inc LEXINGTON 517 SO Uruon J & J s Hobbies. Inc Carpenter Hobbies MILWAUKEE LITTLE ROCK 1975 N W 36th Street X Celt Model*, me PM 616-947 4949 785 Broadway Rt 5 Box 337 Casanova's Hobby Sherrill's House ot Hobbies ORLANDO 347 Eastland Shoppmg Ctr UTICA RICHMOND HILL MILTON 1423 S Muskego Ave 3400 S University Ave Bob'* Hobby Center. Inc PH 606 254 2406 Henderson S Hobbies Wilson Hobby Kreb's News tand PH 41 4 6 7 2 2700 Hall Ptaza Shopping Center 7333 Lake Underhill Road LOUISIANA 2441 Auburn 104-40 Jamaica Ave 83 Broadway WAUSAU PM 5 6 2 -8 2 » PENSACOLA BATON ROUGE WARREN ROCHESTER PITTSBURGH Pope's Hobby Land NORTH LITTLE ROCK Bobe's Hobby House Hobby Towne Prop Shop Hobbies Dan's Crafts 4 Thing* Bin 4 Walt * Hobby Shop 640 South 3rd Ave Mad'io Hobby House 5719 North W Street 3112 College D rive -S u ite A 23044 Van Dyke 352 Empire Ølvd 116 SmithfieW St CAN40A 4212 McArthur Drive PLANTATION MANDE VILLE 1 Block N ot 9 M i* SYRACUSE READING BAWLf ALBERTA CALIFORNIA Universal Hobbies Mercury Hobbes. In c WYANDOLLE Walt's Hobby 4 Craft Iron Horse Hobby House B 4 P Transport Ltd BURBANK 141 South State Road 7 Rt 6 Box 734A Stoner Hobby Center 4300 W Genesee Si 60 South 6th St Box 6 T 4 A Hobby Lobby POMPANO BEACH METAIRIE 145 M ap * St UTICA READING PH 373 3953 3512 W Victory Btvd Trade N Hobbes M 4 M s Hobby Art 4 Craft Ctr PH 313 283 2355 American Hobby 4 Sports O tt 's Hobbies CALGARY ALBERTA COVINA 2159 S E 9th St 5229 Veteran* Blvd MINNESOTA 2107 Whifesboro Street 5 » N 10th St Hobt-r World Canada Covina Hobby Center SARASOTA NEW ORLEANS BEMID/l PH 315-724-4959 SLATINGTON Box 968 Stn M 140 N Citrus H 4 H Hobby Sales Pet 4 Hobby Center Hobby Hutch NORTH CAROLINA Valley Hobbies 4 Collectibles CALGARY. ALBERTA PH 331 1910 4121 S Tamumi 4035 Touro Street Paul Bunyan Malt CHARLOTTE 102 Mam Street P M S Hobby Craft EL CAJON SOUTH DAYTONA WE ST WE GO BLOOMINGTON Science Hobbies. Inc WARMINSTER Calgary North Hill Centre Mika's Model Shop Ace Hobbes Ctark's Hobby 4 d a f t Center Jolly's Hobbies 4 d a fts 2615 Central Ave. J.C RC Hobbies WINNIPEG MANITOBA 229 East Mam 2133 So Rdgwood Ave 729 West hank E ipressway 7935 Southtown Center EDEN 13 York Road Cette- Dweller Hobby Ltd FRESNO PH 904 7619780 MAINE CRYSTAL Coke s F« it 4 Hobby Shop PH 215-672 5200 1354 Mam St Fresno Hobby 4 Cretts TAMPA WATERVILLE Crystal Schwinn Cydery Rt 2 Box 222 WAYNE PH 589-2037 » 2 6 N Cedar Ave Farmers Sundries 4 Hobbes JFK Hobby 4 d a f t C tr Inc 6324 Bass Lake Road PH 919627-0166 Hyatt Hobby House WINNIPEG MANITOBA FULLERTON 4939 E Broadway JFK Mall DULUTH GREENSBORO Gateway Shopping Center Gooch's Hobbies California Model Supply PH 81 3 248 3314 MARYLAND Carrs Hobbies Sports 4 Hobbies Unlimited PH 215-687 2244 646 Portage Ave 1056 South Brookhurst GEORGIA WALDORF 2014 West Superior Street 2144 Lawndale Drive SOUTH CAROLINA ST JOHN'S, NFLD HAWTHORNE ALBANY Doug s Hobby Shop ST PAUL Lawndale Shopping Center GREENVILLE Caprtd Hobby Centre. Ltd Chuck s Mode· Shop Lowett's Waldorf Shooper's World Gulliver's HENDERSONVILLE The Great Escape 6 Freshwater Road 14106 Hawthorne Btvd 1601 N Slappey Btvd MASSACHUSETTS IS26W Larpenteur The Hobby House Pteasantburg Shoppmg Center DUNDAS. ONTARIO LAKEWOOO PH 912-8882095 AMESBURY RICHFIELD 1211 Asheville Mwy 1426 Laurens Roed Skycratt Hobbies Inc Hobby Warehouse MARIETTA Goodwm's Photo 4 Hobby Hub Hobby Center PH 692 6683 Ph 803 235 8320 or 242-4229 139 v ork Road 4120 South Street Complete Model Supply » Mam Street 16 W 66th Street HIGH POINT MYRTLE BEACH SCARBOROUGH. ONTARIO LIVERMORE W ests«* Shoppmg Center BOSTON ST PAUL Berme's Craft 4 Hobbies. Inc Ed s Hobby Shop Toronto R C Hobby Hobby Haven 806 Sandtown Road Eric Fuchs Hobbies Mac's Modets. Inc 2291 English Road Mwy 501 Next to Fenjoy 1869 Lawrence Ave E 1756 First Street ROSWELL 28 Fremont Street 1322 N R DEALERS: Write For Details On How Your Name Can Appear In This Column OCTOBER 1983 5 gories are defined in the rulebooks. Oh done with this one, had anything gone yes, Tony's aircraft metthe IMSspecified wrong. Model aircrafting would have wing loading limit of 1-1/2 ounces per received another, and possibly fatal square foot. black eye from the public when in While we readily acknowledge the actuality the Bellanca was not a model in difficulties overcome in accomplishing any legal sense of the word, except that the feat performed by Roland and his it did not carry a living human being (nor pilots, we cannot get any positive feel does any RPV or radio guided missile). ings about the potential hazards gener The primary motivation for establish ated by this kind of flight attempt. Was ing a national model airplane organiza the FAA contacted for permission to tion some 46 years ago was based on the make the flight? Assuming the pilots fact that the nation was about to follow were transported in a ground vehicle, one state’s decision (Connecticut) to did they have permission to exceed the limit the flying of gas powered model maximum posted speed limit in order to airplanes to licensed full-size aircraft keep up with the aircraft? Was there, pilots! Before our national government perhaps, a police escort to clear the way threatens to step into the picture again, for the ground vehicle? What did the our modeling organization had better aircraft have to fly over (traffic, pedes show that it can handle its responsibili trians, populated areas) not normally ties with regard to the safety of the protected by insurance, AMA or other public. Favorable publicity for this ' f r o t n wise? Remember, it was carrying as “ record” flight could encourage others much as 40 pounds of gasoline. less skilled than the Spicer group to try AMA's letter to Spicer explaining that even more hazardous feats using larger ø m the flight could not be officially recog and heavier aircraft which the public nized for a record also commented that, would mistakenly identify as being N o r t h r o p ' * "The flight deserves recognition and it model airplanes. will no doubt receive much favorable LOOKING FOR publicity. (It) is an outstanding accom Harry Utgard, N-8720 Vikholmen, w o r k b e n c h plishment." Norway, is looking for a fellow reader of While we go along with AMA’s recog Model Builder who may have detailed • On June 4 of this year, an R/C scale nition of the flight as being an outstand information on the Boeing XL15 Scout. model of a Bellanca Skyrocket was flown ing accomplishment, we cannot under This was a rather strange looking pod- on a non-stop round trip totaling 454 stand why those involved were not and-boom fuselage aircraft, single en miles. The flight started at St. Augustine admonished for the illegal and poten gine, with outrigger flapsand an inverted Airport, Florida, and the turnaround tially hazardous conditions involved. flat-bottom stabilizer. Twin rudders point was the intersection of 1-95 and When the news media will unknowingly hung down from the stab, making the Route 267. Total flight time was 8 hours, believe and publish the story that a 50- whole tail section appear to be upside 13 minutes, producing an average flight pound lawnmower could be flown by down. speed of 56-3/4 mph. radio control, rather than the model it The model was designed and built by really was, imagine what they could have Continued on page 100 Roland Spicer, of St. Augustine, Florida, and it was piloted on this flight by Rhett Radford and Dean Mclnnis. The Kawa saki 3.15 powered aircraft weighed 50 pounds dry, and on the distance flight, carried 6-1/2 gallons per fuel, consisting of Amoco white gas and Chevron two- cycle oil. It still had 1-1/8 gallons of fuel at completion of the flight. A Zinger 24x 10 prop, CB wheels, and Coverite were the other known commercial products used. Although an FAI record application was filed by Burnis Fields, Jacksonville, Florida hobby shop owner and CD, in behalf of Roland Spicer, it had to be turned down by AMA, as the aircraft was too heavy to qualify in any FAI, or for that matter, AMA model category. In fact, with the 6-1/2 gallons of fuel on board, the aircraft weighed 92-1/4 pounds at takeoff, considerably over the AMA Safety Code limit of 55 pounds! As for the unofficial status of the ADVICE FOR THE PROPWORN Dear Breaking Up: "record” flight, we can feel for Roland —By JAKE I'm not sure. How much did you pay Spicer, who by the way, is a mere Dear Jake: for the kit? youngster of 77 years. During our IMS My wife is constantly complaining that —Jake Trade Show in Pasadena, California, my hobby takes up all my time, stinks up ★ ★ ★ the house, and makes a terrible mess. I several years ago, Tony Nacarrato also Dear Jake: just bought a brand new Phoenix 8 kit set an unofficial record, flying an electric I don’t understand the distinction and a Webra Special 61. She says it’s the powered (lithium cells) R/C model in between elevator and stabilizer and last straw, and that if I build it, she’s the exhibition hall, over the heads of between rudder and fin. Which is which? leaving me. Now I must choose between spectators, for 1-1/2 hours! Same prob —Confused in Compton lem . . . no official AMA or FAI category! my hobby and my wife. What should I However, Tony did not file, as he already do? knew there was no category. All cate —breaking Up in the Bronx Continued on page 94 6 MODEL BUILDER OVER THE COUNTER ψ . 'Ψ ...... ···· - · ········'· · ϊ ; ;; · ' ‘-111 1 11 w l 1111 ΗΠΛ'ΑΟΑΟ M.M.U.1.1.1.1.1.1. v * * V ^ y jv * ‘ * * ~ ~ V·?*:·:·!::::::χ :χ χ Χ χ ·χ ;· χ ::::;:::χΧ ·:*£'·:*· i n / * * · £ i n ;ň | : .\·Χ·Χ·Χ \·Χ·Χχ·χ·χ·* χ·Χ·Χ·Χ·Χ·*·Χχ·χ· ,*·Χ·Χ·Χ i'·*· l n i X x :v ťiÝ v! χ#χ χ .χ ·χ ·χ·Χ χΧ ·χ· ··· · v·.·..χ·χ<·χ"!·:·.· -<·.·.·.·.·. c· χ . ; ? $ · % . ]Æ ϊ ' Μ B yÉil f a r » - - « 3 5 3 SR?"* r n s t ø ? · ϋ & A ll materiaI published in "Over the Counter" is quoted or paraphrased from press releases furnished by the manufacturers and/or their advertising agencies, unless otherwise speci fied. The review and/or description of any product by R/CMB does not constitute an endorsement of that product, nor any assur ance as to its safety o r p e rfo rm a n ce b y R/CMB. • Bryon Originals has just announced the release of its much improved, cus tom F-16 kit designed for the patented Byro-Jet ducted fan and the popular Rhom Air retracts. Numerous additions and improve ments are featured in this superb kit. Both the General Dynamics markings and a decal/template package to repro duce the new Air Force Thunderbird markings are now available. An im proved flying stab control horn and linkage system provides added stabilizer rigidity. Convenient plug-in wings now include Bryon Originals’ exclusive Plug- In Aileron Linkage system for added Indoor Model Supply's newest P-nut, the Alco Sport Home Built. ease of wing removal and assembly. And last, but certainly not least, a truly Byron Originals kits, the new F-16 is inch diameter or less. It is also capable of functional, realistic, optional adapter kit indeed a complete kit. The factory direct bending square and rectangular metal for Rhom retracts is also available. It price for the kit is $264.98 plus $10.50 rods of 1/8-inch measurement. The Mini makes installing the Rhom belly mount shipping. The optional retract adapter Wire Benderwill make any wire bending system quick and easy. kit sells for $65.95 plus $2.50 shipping. job so easy that you will actually look All fuselages are now lighter and of For additional information, or to place forward to using this tool time and time superior quality. They also now include an order, contact Bryon Originals, P.O. again. factory installed mounting bases that are Box 279, Ida Grove, IA 51445, or call (712) The Mini Wire Bender is designed to predrilled and ready to accept the 364-3165. be clamped in a bench vice for easiest specially designed retract adapter kit for ★ ★ ★ — use, although with smaller wires, a pair the Rhom Air retracts. A unique gravity K&S Engineering now has a smaller of channel lock pliers will do the trick. feed fuel system that ensures a positive version of the popular K&S Mighty Wire The base has two incredibly strong metal and uninterrupted fuel flow to the car Bender.' The Mini Wire Bender is just the pegs sticking out of its surface, one of buretor has also been added. As with all right tool for bending music wire of 1/8- which serves as a pivot axle for the handle. The third peg sticks out of the handle’s upper surface and pulls the wire around the pivot peg insuring a bend that won’t over stress the metal and cause cracking or failure. If you have a need to bend music wire, or any other kind of metal, you need this tool on your workbench. The most common applica tion for this tool will undoubtedly be for forming landing gear, but it will also come in very handy for making clamps, hangers, brackets, and a host of other gadgets. For those who need a wire bender for music wire or metal that’s a little heavier than 1/8-inch, we recommend the Mighty Wire Bender (pictured with the Mini Wire Bender). With this larger version you can bend up to 1/4-inch metals. You definitely will need a bench vice for these operations as mere pliers will be ineffective. Both tools are plated with a protec- OCTOBER 1983 7 K&S Mighty Wire Bender and Mini Wire Bender (above) and in use (left). mixture, economically consuming only one-half ounce per minute at full throttle. It mounts directly to the fire wall, eliminating the need for heavy expensive motor mounts, and facilitat ing thrust adjustments. Overall dimen sions of the Echo 20 CP are 111 x 194 x tive. black oxidized finish for long life of Peanuts from Lew Gitlow. The kit 186 mm (4.3 x 7.6 x 7.3 in.) including and appearance. Both tools come with features two plastic cylinders and a muffler and air cleaner. handle grips for ease of use. Look for drilled and turned nose block that is part The Echo 20 comes complete, ready to these two great wire benders at your of the engine. run, with a factory adjusted Walbro local hobby shop or order directly from All IMS kits in the “ Miniature Air diaphram-type carburetor with built-in K&S Engineering, 6917 West 59th St., craft” series have a historical data sheet choke and air cleaner: one of the most Chicago, IL 60638, (312) 586-8503. Send with fine detail and three-views, and a reliable and easily adjusted carbs ever 25 cents for price list and catalog. The history of the aircraft. Send for the new made for this class of engine. Included Mini Wire Bender retails for $7.95. IMS catalog and include $1.50 (includes also is an NGK resistor-type spark plug, ★ ★ ★ postage and handling). Kits sell for $6.95, long lasting, readily available and in Just when you thought Indoor Model and the book Peanut Power is available expensively replaced; plug lead; muf Supply had released its last Peanut for $8.95 (postage FREE in the USA). fler; fuel mix pitcher; flywheel cover; model for the season, out comes the Indoor Model Supply, Box C, Carber- plug and Allen wrenches; and opera new 1929 Alco Sport Home Built. This ville, CA 95440-0039, (707) 923-3500. tor's manual. nifty little paper and stick model is the ★ ★ ★ If your present .90 powered aircraft is latest "Miniature Scale Aircraft” in a list News from California Model Imports underpowered, or if you are contem has reached us that the new Kioritz Echo plating building one in that size range 20 GP is now available to the general or slightly larger, 12 pounds or heavier, public. The Echo 20 GP is a 21.2 cc (1.29 the Kioritz Echo 20 GP is the engine that ci) displacement engine recommended will put sparkle into its flight. for those airplanes too large for a The Echo 20 is priced at $159.95; dealer standard .90 and yet not large enough inquiries are welcome and promptly for one of the extremely large engines answered. Contact California Model now available. Imports, P.O. Box 1695, Garden Grove, The Kioritz Echo 20 is rated at 1.2 hp, CA 92642; telephone (714) 638-3372. and 9000 rpm maximum. It is a magneto ★ ★ ★ equipped ignition engine, designed to run on an inexpensive gas and oil Coverite announces the introduction Coverite Pocket Thermometer for irons. California Model Imports Kioritz Echo 20 GP (1.29 ci). 8 MODEL BUILDER Prather Products Fast Cat Tunnel. of a much needed tool to helpeliminate sags. With the Pocket Thermometer, this common covering problems, such as hidden problem is corrected. bubbles and sagging. They have devel In addition, Pocket Thermometer is oped a Pocket Thermometer that you recommended for use on all engine to put on the bottom of your tack iron for make sure you do not accidentally an instant reading of the exact tempera damage the engine by overheating due ture. This enables the modeler to adjust to a "too-lean” run. Many modelers rely his iron so it works properly on wood or on the sound of their engine . . . some foam, film or fabric. A handy chart what of a gamble; many others simply comes with the Pocket Thermometer hope and pray the engine is set up and it shows the correct temperature properly. With a few seconds use of range for every type of covering. Pocket Thermometer, you will know In many cases iron temperatures vary positively that the engine is not running as much as 60°, without the modeler too hot. knowing about it. As a result, sections of Pocket Thermometer comes with a the covering do not receive the correct amount of heat, resulting in bubbles and Con tinned on page 92 Kimbrough Products Wingties (above) and Gear Adaptors for Tamiya. Ernst Mfg. Futaba Charge Receptacle (above) and Thrust Plates. OCTOBER 1983 9 This rear view shows two nice extras: needle valve extension (right); Side view of the new Enya .90 Four-Cycle engine shows what it carb choke extension (left). You got cowls? NO PROBLEM! looks like with the muffler installed. Q-U-l-E-T.. . • Have you ever been fascinated by an Here's how things went upon opening up another "10.” engine? Perhaps . . . but then again you the box. .. Next, I perused those other accom may only have been interested in an It sure looks great. In fact, I seriously panying papers. You know, the ones engine or engines. Be that as it may, don’t think anyone could ask for more in you read when all else fails. They’re there is no question that, in recent years, the way of appearance. Chalk up a "10” called: Instructions. They were excellent the four-cycle engine has become quite for looks. as far as the general subjects of starting, popular amongst modelers. Ten years There were other things in the box, break-in, etc. They were, unquestion ago, who would have thought we'd be notably tools peculiar to the engine. I’m ably, outstanding with respect to flying chain saw or lawn mower engines? referring to millimeter wrenches, etc. peculiarities of four-cycle engines which A lot of modelers now do just that. Although our nation has officially en require special attention to such things However, it’s nice to observe that several dorsed the change to the metric system, as valve clearances, timing, etc. Another model engine manufacturers have re it’s still quite difficult to obtain metric " 10." acted in a commendable way by pro tools at the local hardwarestore. Frankly, Of course, there was a parts list. Nice, ducing sone four-cyclers designed spe there’s almost nothing more frustrating but the great part was that they included cifically for modelers. than trying to use American Standard a superb exploded view drawing of the I recently had the pleasure of receiv tools on metric nuts and bolts, or vice engine. Without reservation, this is the ing one of these engines through the versa. Fortunately, Enya has foreseen best model engine part drawing that I aegis of Model Builder. The engine? The this dilema and provided a mini tool kit have ever seen. Again a very so//d “ 10.” Enya .90 Four-cycle. OK guys, let's let it . . . all you’ll need to service the four At this point I was beginning to be all hang out. This is one of the finest cycle .90. suspicious. Don’t ask me why. It was just engines I have ever had the pleasure of One of the accompanying photo a "wondering” about how so many handling. Considering that I’m quite graphs shows what I mean. As an engine pro two-cycle, that’s a considerable bit. tinkerer, this was a big plus to me. Chalk Continued on page 78 Here is a close-up shot of the carburetor and Another view of the top of the Enya shows Thorough to the max, Enya provides a nice choke. Simple, effective, very nice. the exhaust adapter and lock nut. Any angle! metric tool kit with each engine. 10 MODEL BUILDER Russian OSA Missile Boats By WALT MUSCI ΑΙΜΟ . . . Part Two of the Russian missile boat story delves into the actual construction of this fascinating, and little known, weapons system. This one features a live-firing missile, guys. It's HOT! • The full-size Russian missile boat can CONTROLS is dry, check the deck outline and launch up to four Styx cruise missiles R/C operation of our model includes correct as necessary. Using sandpaper, from combined hangar/launchers. steering, proportional speed control smooth the joined sheeting, and note These Soviet boats revolutionized the (plus astern operation), and the launch the rounded overhanging deck edge. existing concepts of naval warfare when ing of a model Styx missile from one or Also notice that the deck tapers down an Egyptian operated missile boat sank more of the hangar/launchers. This toward the bow in the profile view. Lay an Israeli destoyer in just a few minutes requires three channels; however, the the deck on a flat surface, cut the 1/8 x with four direct hits. The Osa Fast Patrol missile launching is entirely optional, 3/4-inch balsa coaming strips to shape, Boats-Missile are the advanced state-of- but it's great fun and creates a sensation and cement them to the inside edge of the-art, and are the David in the “ David every time you fire. the deck opening and to the full depth and Goliath” contests envisioned by CONSTRUCTION (thickness) of the deck. Use plenty of today’s naval strategists. The Osa boat Construction of the Osa model is the cement and be sure to cement the and Styx missile story appeared in last epitome of simplicity using plywood and coaming pieces to each other at the month’s Model Builder, complete with sheet balsa throughout with sheet corners. The coaming is necessary to rare photographs of the Osa boats and aluminum and oak tag card for the hold the superstructure in place as well Styx missiles. Our model is built to a hangars. There are nocompound curves, as to prevent water from entering the scale of 1/4-inch equals one foot. and no planking is required. Power is by hull should water inadvertently flow 5 electric motor, so fuel proof liquids in construction are not mandatory. All metals in contact with water should be brass. Our model follows the full-size boat with three propellers and two rudders. If desired, one large motor driving a single propeller with one rudder can be successfully installed for simplicity. The deck is the first component to be assembled. The wood grain should run athwartship (across from one side of the boat to the other) for added strength. Notice that the center of the deck is an open rectangle which runs between the coaming and deckhouse sides and the deck pieces should be assembled around this opening. It is necessary to edge join Launch! Walt's OSA missile boat fires a model several 3/16-inchbalsasheetstogetherto Walt Musciano shows the two Styx missile ver Styx cruise missile across the pond at an un form the proper hull length because ot sions used with the OSA boat. .. one is scale known target. It follows a low trajectory. the athwartship grain. When the cement and the other is functional! See plans for both. OCTOBER 1983 11 in its proper position. Be sure to apply plenty of adhesive to the tube installa tion as well. Place weights on the joined keel halves until the epoxy adhesive is thoroughly hardened. The hull structure begins by cutting bulkheads “ A" through "K ” and the 1/8-inch chine pieces to shape. Note the grain direction. Although the plans show only one-half of the bulkheads, they should be cut in one piece from side to side. Of course, due to the limited balsa width, and the fact that the grain should run athwartship, a hori zontal seam near the keel is necessary where the pieces must be edge-joined. Mark off the bulkhead locations on the assembled keel, then place the bulk heads on the plans, inverted, holding in place with pins driven diagonally through the bulkheads and into the workboard. Carefully place the keel into the bulkhead notches and check the alignment of all bulkheads. Apply plenty of cement to the bulkhead/keel joints and, when dry, recement all joints. The OSA's innards are revealed when the The local pond can be a real gas if there are superstructure is removed. Note antenna lead While these are drying, the chine some ducks to race. When the OSA is armed, to hatch, large battery, and receiver. pieces can be assembled at the splice other R/C boaters will keep their distance! lines and cemented into the bulkhead over the bow and onto the deck. notches. Recement when the first appli aft from the center pieces, on both sides The keel is 1/4-inch thick. It is made cation is dry. Using a sandpaper block, of the hull, to prevent a possible bend from two layers of 1/8-inch plywood. trim the chine flush with the bulkheads ing or warping of the structure. Be sure Cut enough pieces to make two keels, in preparation for the hull covering. to cement every adjoining piece to the and assemble the keel pieces along the Check all joints and recement as neces previous covering piece as well as to the splice lines. Each keel half is assembled sary. structure. All seams must be well separately and not joined until the shaft The hull covering material is 1/8-inch cemented. When the entire bottom is tube is installed. Notice the extra cutting sheet balsa. Note the grain direction covered, the edge of the covering at the away of the keel for the universal joint which adds strength and facilitates the chine should be sandpapered flush with and the motor. Of course the shape of slight bending in the bow areas. the sides of the bulkheads to give the this cut-out depends upon the equip The bottom covering is applied first side covering a good surface for ment used. Cut the center propeller with the hull structure inverted. The cementing. shaft tube to length. Very carefully mark only fitting required at this time is to The 1/8-inch sheet balsa hull side the location of the shaft tube on both bevel each piece of 1/8-inch sheet balsa covering pieces are installed similarly to keel assemblies. Be certain the marks are to fit the keel as the sections illustrate. the bottom pieces starting at the middle on the inner surface of the keel halves. Begin covering the bottom amidships of the hull and progressing fore and aft. Using a routing tool, such as an X-acto, around bulkheads “ E” and “ F” . Apply Each piece should be cut at the proper cut a groove into each keel half for the lenty of cement to the keel, chine, and angle so the edge of each covering piece shaft tube. Cut a little at a time, placing ulkhead, then quickly press the first rests evenly on the work board as it is the tube into the groove periodically to covering piece firmly in place, holding cemented to the inverted hull. The edge check the fit. When the keel halves can with straight pins until dry. The second at the chine should be cut slightly touch with the tube in place, the keels piece should be the identical counter oversize for trimming after the cement should be well cemented or epoxied to part for the other side of the hull. each other with the tube between them Covering should progress forward and Con tinued on page 74 12 MODEL BUILDER Dick Hanson with Tiporare at local "small' flying site in Utah. You Here's a very lightweight engine and pipe set-up on a Cheap Trick. couldn't hit a tree here if you wanted to ... nothin' for miles! Engine is an OS VS .46. See text forsorne build-it-light tips. • How do you build a really light pattern 9) Pushrods. Use .047 wire in .062 I.D. get it to run well and produce power at bird? This is the most asked question I plastic tubes. about 12,000 rpm. Frankly, we are not have received to date. I have tried to 10) Tail surfaces. Use 1/16 balsa over convinced that it's the way to go because answer this question several times in the foam, cover with Monokote. no matter how good the propeller is, the past, but the basics seem to require 11) Linkage hookups. Use 4/40 .60 two-cycle engine just won’t produce some clarification. I guess I should start threaded wire for elevator, rudder, and high power at this rpm. by noting that the "average” pattern aileron horns. Bury these in discs or 1/2- The loss is probably about 50 percent model used in AMA pattern by the inch dowel sunk into the foam surfaces. of what these engines are capable of "average” pattern enthusiast who flies 12) Wing. Use 1/16 balsa over foam, producing, and that's just plain too Sportsman or Advanced class has ap cover with Monokote. Attach balsa to darned much! We had hoped to have proximately 700 square inches and foam using epoxy. tests done on the new 1.2 O.S. four-cycle weighs 8-1/2 to 9 pounds dry. 13) Landing gear. Retract or fixed . . . engine, but the engines were shipped I know you are not average, but never the weight is really not much different if later than planned. the less that’s an average profile. A light you analyze it. If the gear is mounted in The O.S. gear box engine still pro pattern model of 700 square inches the wing, the structure must be able to duces more usable thrust than anything weighs 7-1/2 pounds. Depending on stand the same loads of landing. There we have seen or heard of at this point in your tastes, this may seem a trifle light, fore you will probably use the same time. but it is a good combination for most amount of wood to properly locate Depending on the size of the model, people and many winners agree. either fixed or retract gear. which can vary from 900 square inches to Oddly enough, the new FAI maneu 14) Wheels. They will be the same for 1200 square inches, you can use the 1.4 vers for 1984 may require even lighter either set-up so the weight stays the gear box or the 1.9 gear box engine. A models. What we mean is the wing same. 14-8 prop on the 1.4 engine and a 16-10 loadings may have to be lighter yet for 15) Gear wire. You use less on a on the 1.9 model seem to work well. The the best performance. retract gear but the retract has a best 14-8 we have seen is the D.W. How do you make the things lighter? mechanism which weighs a couple of design; the best 16-10 we have tried is Ribs, tissue, nitrate dope, etc., come to ounces. The net difference is very slight. the Top Flite. The key design features to mind, but they are really not necessary. 16) The retract gear weighs about two look for are stiffness and a thin tip. Let’s take a model from front to rear ounces including the mounting plate,so You really have to rework for best and look at the possibilities for weight this is the real weight gain. performance, but I don’t recommend reduction. 23456781 17) The bare fuselage can be made of this unless you fully accept the fact that glass and or wood for under 18 ounces propeller reworking can produce á 1) The spinner. The spinner can be on the typical .60 size model, so it is not dangerous propeller which may crack or eliminated, or a light plastic one can. be impossible to arrive at a finished model break with serious results. This means used on slow turning (12,000 rpm) weighing six pounds, give or take a little. you can be hurt or others can be hurt as a engines. Is all of this really necessary? I think so, result of your attempts at whittling. 2) The engine. By using a lightweight but I like a plane that can be accelerated The reason I keep mentioning these or slowed down just by using the throttle. tuned muffler, you can save about six engines is the fact that they produce the I don’t like sleek models which drop like ounces. maximum power available from a box- rocks when the nose is pointed down. stock engine that fits the AMA rulesfora 3) The motor mount. Use hardwood Another design trick which will result pattern engine. Note that I didn’t say rails with an aluminum plate on top. in less weight is the thin wing. Don’t be B.H.P. or net torque or any other specific 4) The nose gear. We suggest a tail- afraid that it will make the model diffi ratings. They simply turn the most dragger set-up, so this is out . .. so is a cult to fly; that problem is directly efficient propellers at the fastest speeds. thick firewall if the engine is on rails. related to a heavy model with a thin The new four-cycle engines have not 5) The tank. Not much to worry about wing. Try flying a good Quickie 500 to been tested against either model O.S., here. satisfy yourself that thin wings can be but I will be very surprised if they meet 6) The tank floor. Design it out. very groovy. or exceed the power produced by these I hope this has answered most ques little buggers. 7) Wing mount. Use 1/4-inch ply tions about light construction. If you Next month we will have all the latest wood front and rear. have any specific ones, let me know. poop on the O.S. four-stroker and the 8) Servo mounting. Use 1/8-inch ply For the last month, we have been S.T. 2000 . . . Till then . . . KEEP ON plate, no rails. working on a two-cycle .60, and trying to TRYING. · 14 MODEL BUILDER Electric Powered By LARRY JOLLY ... Do you seriously doubt that there could be such an animal as an electric pattern plane? You'd better read this! • Clyde Der Taubin and his buddies in and asked Paul Bender if I might have a enough, 16 cells gave me enough power Texas won’t be in this article because I'm shot at electrifying his new Chipmunk. to fly the Chipmunk at a current rate that very serious about this subject, and I Paul agreed, and I hurried back to would yield reasonable flight times. hope you will read it and think about its California to assemble my new toy. Back to the shop with a Challenger 40 message. This article deals with what I Before I started assembly, I had to in hand, I was off and running. I modi would consider a major breakthrough in decide what electric motor I would put fied the engine mount that came with radio controlled electric sport aero in the plane. I decided against the Keller the Chipmunk into a motor mount for batic models. The model in the spotlight or Geist 40 because they simply re the Challenger, and installed an Air- is one of Pilot's new EZ-build series, the quired too many cells to achieve the tronics radio for control. Sixteen, 1.2- Chipmunk. power level I would require. I went to amp, yellow Sanyo cells easily fit into the The Chipmunk is as close to an ARF as see Astro Flight’s Bob Boucher, and we Chipmunk’s fuselage. you can get. It is constructed from a hard bench-tested his new cobalt Challenger Before I go any further, a few words plastic foam laminate with internal 40. The Astro 40 achieves maximum are in order. At no point in assembling wood structure. There is no finishing. power on 18 cells. I had decided that I the Chipmunk did I try to save weight. The scale color scheme is moulded on would need at least a 9-5 propeller to As the airplane is an ARF type, little the hard outside shell. One merely joins motivate the Chipmunk. weight could be saved in the airframe, I the wing halves, bonds the tail surfaces Bob placed a 9-5 Rev-Up prop i n place used large servos and a 450 mah airborne in place, installs the motor and servos, and cranked his power supply to 18 pack. This model was assembled exactly and he is ready to go play Art Scholl with volts, "taching” the 40 showed us we as an average R/C modeler would have a model that really looks like the Chip had 12,000 rpm, and a rather disappoint assembled it. The Chipmunk, ready-to- munk. The vital statistics are: wing span, ing 27-amp draw. Remember, when fly with Astro 40 and 16 cells, is 96 52 inches; wing area, 411 square inches; utilizing 1.2-amp cells, 72 divided by 27 ounces, or six pounds on the money. length, 38 inches; dry weight, 42 ounces; yields under three minutes of flying time The Chipmunk wing loading is33ounces and it is designed to be operated with even with the prop unloading. I asked per square foot. The electric Chipmunk four channels of radio control and a Bob to turn down the voltage until we weighs a little over one pound more .25-,28 glow or .40 four-stroke engine. had a draw of 20 amps, this would give While in Toledo, I saw this new model me at least 3-1/2 minutes of flying. Sure Continued on page 69 SPORTSMAN OPEN SEQUENCE You can expect pattern performance from converted pattern planes when you use the Astro Cobalt 40 on 16, 1.2-amp Ni-Cd cells. The Pilot Chipmunk holds everything you need right here: RX battery, receiver, aileron & elevator servos, power pack. OCTOBER 1983 15 Are you looking for a perfect R/C trainer . . . electric style? Try the Leisure Playboy, it has hands-off stability, yet is the best thing going in electric Old Timer contests. As a trainer, if you get into trouble at altitude, just let go of the stick, the Playboy rights itself and flies straight. -ELECTRIC By MITCH POLING • As the steady readers of this column send you some black and white photos ROW. Finally, after three years, he know, I love seaplanes, both in model back in return for your efforts. I do found that the Top Flite 6-4 cut to 5.25-4 and full-scale form, and when Terry return the negatives promptly. I can did the job. McGill sent me photos of his friend Jerry make black and white prints from the The plane is built entirely out of sheet Holcomb's electric Widgeon, / went color prints too, but it means I have to balsa, including the wings. The motors bananas/ The photos were color prints, take a photo of a photo to get the black are twin Astro 035s, with simple, on-off however, so I asked Terry to send the and white negative, so the quality isn’t as control, and run from a variety of packs, negatives so I could use the color good. from a 900 mah SR pack, to a Kraft 600 negatives to do black and white prints. Anyhow, back to the plane . .. Jerry mah pack, to a Sanyo sub-C pack, all six- Terry was kind enough to do just that, does immaculate work. (He is also a full- cells. The Widgeon will ROW with all of and so we can enjoy the photos of the scale aircraft builder with an excellent these, and weighs 32 ounces with the Widgeon. working knowledge of composites and Kraft pack. This is remarkably light. By the way, if you have photos of your metal. Right now he is working full time I built a Widgeon three or four years electric and would like to see them in on an almost-ultralight called the Ultra back, in exactly the same way, all sheet, print, don’t hesitate to send them. Most Imp, for the Recreational Pilot category with twin Astro 020s, and was disap people nowadays use color print film, that has been proposed to the FAA.) pointed with an all-up weight of 39 and this is fine, if you would include the Jerry had to do a lot of experimenting to ounces. My Widgeon will not ROW at negatives. I can make excellent black find the right prop for the Widgeon, the that weight, and was marginal on hand and white prints of the photos from the 5.25-3 props recommended for the launch. So, Jerry is doing something color negatives, and if you want, I can Astro 035 would not allow the plane to right! Leonard Bedford pops the cover from the side-mounted flight pack Ah-cho-o-o! Leonard's Playboy didn't sneeze, what you are looking of his Leisure Playboy. Note 360-bend in LG: keeps LG from bending. at is a Top Flite 11-7-1/2 prop. Astro belt drive, air scoop cooling. 16 MODEL BUILDER Widgeon's tip floats are complete, even down Jerry Holcomb's Grumman Widgeon model weighs only 32 ounces with a six-cell battery pack, to the wire bracing! All sheet construction is used. Astro 035s do the job of motivating with help from 5.25-4 props. Jerry’s Widgeon has a span of three tion in the letters I receive is "what plane feet, and a wing area of 250 square do I start w ith." Usually, I have to qualify inches, so the wing loading is fairly high. my answer, depending on the goals of This is not a beginner’s plane as it flies the inquirer. There are a few planes, pretty fast, but neither is the full-scale though, that I can and do recommend to one! everyone because they have outstand The radio system consists of a Kraft ing qualities. One of these is the Olympic receiver, 100 mah battery, and KPS 18 650. I now have a new one to add to the servos. Four channels handle all of the list: the Leisure Electronics Playboy controls. Senior. The finish is Silkspan over the sheet The Leisure Playboy kit is not new, it balsa, and K&B Superpoxy is used for the has been out for a couple of years, and it color. has won every contest it has entered for Jerry found the drawings for the plane old timers. It really startled me when I in the March 1967 issue of American saw the Playboy’s rate of climb this year Modeler. Unfortunately, this magazine at the Astro contest. At the time, I wrote has been out of business for many years. that it made a joke out of the 90-second Paul Plecan had an excellent set of plans motor run, five-minute max rules. It for the Widgeon in just this size. The does six or more minutes from a 1-1/2- plans are now available from John Pond minute motor run in still air. Plans (order from the rubber power Flowever, I still thought of it as only a scale catalog). contest plane, it hådn’t registered with One last item . . . Jerry made the me that it is also an excellent sport plane motor cowls of fiberglass . . . they are a and a beginner’s plane. This is a very rare perfect job, and they sure make my combination. The only other planes I model look crude! I am not sure what know of like that are the Olympic 650 Jerry’s color scheme is, mine was done in and the Olympic II. Well, they’ll have to Coast Guard colors. Later, I found that make room for the Playboy! Kurtzer, who is my instructor in float What happened that changed my planes, has an immaculate, full-size mind was Leonard (Larry) Bedford came Leonard Bedford learned how to fly R/C with Widgeon, and it is all white! That would up to me at the Boeing Hawks Electric the Leisure Playboy, then taught his son, be an easy one to do. Ramsey. Both were "naturals" with the LP. Probably the most-often-asked ques Continued on page 65 Leonard charges his flight packs from two motorcycle batteries which Jerry Holcomb molded these perfect fiberglass cowls for his electric are kept in a wooden box to prevent acid spills. Leisure charger. Widgeon. Jerry also builds full-size aircraft. OCTOBER 1983 17 The TOP TEN two-meter sailplane pilots as determined by this year's Two Meter World Cup held in Modesto, California, on June 11 & 12. See text for a complete description of planes. Take note CIAM! Organizer-supplied, identical winches W ORK!!! T h is is one o f fiv e w inches which were used very successfully at the Two Meter World Cup. NO COMPLAINTS! south of Sacramento, the capital of California. It is also the town where George Lucas, the creator of the Star Wars trilogy and the movie "American Graffiti” , lived and grew up as a teen By B IL L FORREY ager. In fact, Modesto was the basis for the movie “ American Graffiti,” and PHOTOS BY THE AUTHOR Modesto celebrates that fact every year with a gigantic (people come from as far California, in conjunction with the San away as Canada), crazy, all-out “ cruiser” Fernando Valley Silent Flyers of Los parade featuring every kind of car Angeles, California, were the two clubs imaginable with emphasis on the '50s responsible for the success of this event. variety. This year’s "Graffiti Night” Richard Hansen, the contest director, happened to be the Saturday night of did a super job of running one of the the contest. It was wild! . . .I’m getting most difficult contests there is to run. off the subject here, I know, but I just The Modesto R/C’ers made many sacri thought I'd throw that in for some local fices and went through a lot of work that color. I’m sure they didn't fully anticipate to This year’s 2MWC was different from FOURTH ANNUAL TWO METER make sure that this year's 2MWC was as previous World Cups in many ways, but WORLD CUP classy as all of the previous ones. A big the three that stick out in my mind like Looking back at this year’s Two Meter THANK YOU to all of the MRCC fliers the Grand Tetons over the plains of World Cup (2MWC), I will have to who chose not to fly, but chose to help Wyoming are the standardized winches, conclude that it was the best of the four out instead. As a result, this 2MWC was the time of year the contest was held in most areas. Before I get into any of the one of the smoothest running 2MWC (late spring vs. the dead of winter), and details of what was flown by whom, or contests on record. that all contestants were required to why I thought this 2MWC was the best, I The contest was held in Modesto, of have back-up frequencies in the event would like to get a few words in about course, and for those who are wonder of conflicts in that area. the site and the organizers. ing, "Where in the%#?! is Modesto?" I’ll The standardized winches were the The Modesto R/C Club of Modesto, clue you in: Modesto is about 65 miles most outstanding improvement noticed Gary Ittner launches AMA Junior flier, Adam Rich Spicer was the first to launch in the WC Keith Kindrick pulls hard in final turn of his Peltz, into the blue. Adam is coming into his this year . . . and became the first crash sta 10-lap distance task. If you finish the course, own as a competitive flier in multi-task. tistic also. Plane is called Evolution. you had better do it quickly for best points. 18 MODEL BUILDER Typical 2MWC scene. Those guys are racing each other and the clock. Weather conditions this Ed Holder launches his Harrier. The plane was year favored fast-paced action in the distance events. Exciting? YOU BET! developed in the SBSS. E-374 thickened 1.5%. Fred China came from Canada to compete in this year's 2MWC. This is his second World Cup. The plane over his shoulders has: E-205 section, coupled rudder /ailerons, flaps, 17% stab area. strong launches and equality of power, 2MWC, you too will fly from these Mike Reagan heaves Larry Pettyjohn's Ospre. in short, they did the job they were winches as they are being set aside just Model met its doom by hitting winch battery. supposed to do, and they did it flawless for future 2MWCs. HEY WORLD. WAKE ly! A big thank you must go to Buddy Fox UP! The concept of standardizing at the contest. NOBODY complained who constructed them, and the rest of winches WORKS! about them, there were only about four the SFVSF group who donated the I thought that I would run photos of all line breaks during the two day contest, necessary funds. They were: Carl Gold five winches just to show you how they were strong enough to launch the berg, Ed Slobod, Dick Odle, Larry Petty identical they are, but decided against it heaviest two-meters, each winch had john, Mrs. Dicie Bower, Dick Peltz, for two reasons: firstly, five photos take two, brand-new, deep-cycle marine Richard Hautzenroeder, and Knute up a lot of space that would be better use batteries which were rotated to assure Johnson. If you come to next year’s used for aircraft; secondly, except for Don Edberg assembles his Solution on a tripod stand a la the Swiss So, that's how they do it! Unidentified spectator checks out a thick Spartacus. Model is almost all fiberglass and foam. Smooth wings. winged model belonging to Dave Peltz (MB-303515). OCTOBER 1983 19 Robert Regalado IDs Marion Crowder's Interceptor prior to unlimited Gary Ittner IDs Mike Reagan's Lyre Bird 2-m. Mike won the contest distance task. E-193 section with higher camber mod. F/A/C-R/E. on the first day's flights: 3,000 points. MB-303515 section, R/E only. Lee Hodgdon (SBSS) poses with his Harrier. Features: F/A/C-R/E, E-374+ 1.5% section. Brian Chan's Heavy Solution used a molded fiberglass skinned wing w ith E-214 section. Front the donor tags on the front, you couldn’t hole is for aileron leads, next hole is ballast tube, double blade steel joiners, pin, F torque tube. tell if I had printed the same negative five times! Yes, they were lhal identical! Joliet, Illinois. There were probably Personally, I had to buy an extra Silver The other two differences in this many other events (soaring and non Seven receiver and transmitter module year’s 2MWC probably had a negative soaring) being planned by possible in order to comply with the new rule. . . effect on the number of contestants who entrants from all over the U.S. and perhaps others didn’t want to bother? entered the event. There were (I think) abroad which may have conflicted with Enough of this kind of reporting! The 55 people who sent in their entry forms the 2MWC . . . so who really knows? 51 contestants who came to this World of which four did not actually show up Maybe it’s the economy? Cup were richly rewarded with some of for the contest. Why were the entries Another possible contributing factor the best contest conditions I’ve ever down this year (by about 15 to 20)? Well, may have been the requirement for seen for a multi-task event such as this in previous 2MWCs there were no contestants to have back-up frequen one. Besides, it didn’t seem like there conflicting events taking place as most cies. I don’t see how this would have were fewer fliers this year because there of the country was in its “ building stopped any of the “ serious” fliers from were probably three times the spec season” . . . mid-winter. This year there attending . . . it really is an advantage for tators! was one major event scheduled for the all concerned as it streamlines the DAY ONE same time period: The Great Race in running of the event (theoretically). The contest began with a bang . . . Winch victim. Thick winged aircraft had glue joint failure at joiner Mid-air victim. Dick Harty no sooner finished his ten-lap course, blade. Also, joiner ended abruptly, causing stress-riser. turned around to land, then BANG! Didn't see it coming! 20 MODEL BUILDER Base A action got intense in the last tw o rounds of the 2MWC. Keith W ithout prep time or working time, the 2MWC moves a lot faster than Kindrick sights for himself and gets a much better turn than other guy. F3B. You'd better be ready to go when your name's called! The Fresno Soaring Society was represented by Marion Crowder and Robert Regalado who flew Interceptors, and Mike Stroup who flew his Vivace: F/A/R/E, E-193 section. Last flight of the contest. Sometimes if the lift quits, 10-lap distance can be a battle of the quarter-laps. Here we see Pettyjohn about to pick up Mike Reagan's plane outside L2. round: two-for-two casualties! Don Edberg was next with his all literally! Rich Spicer, flying his latest was a local policeman . .. who witnessed fiberglass ship, the Solution. It featured Evolution two-meter (see photo), was the entire incident from outside his the rather thin Eppler 182 airfoil and the first flier to launch in the first round house . .. with another police officer! molded fiberglass skins (see photo). I . . . speed. His launch was a warning to The very next flier was Keith Finken- didn’t record his time as I was too busy all who were to follow: near the apex of biner with his Askant. Keith had the with my own flight preparations (I was his launch, Rich’s wing folded with a misfortune of spinning out on the after Don), but I seem to remember that snap, and hisairplanestreaked off minus ground at the end of his speed run . . . it was in the high 20s. . .very respectable. one of its wing panels toward a house demolishing his plane. It appeared that bordering the field. It hit the roof of the this was going to be an interesting first Continued on page 86 house and lodged its nose (up to the wing root) in the wooden shake roof. All was well with the owner who actually felt sorry for Rich losing his plane and wasn’t too concerned with her roof. She actually came over to the field on Sunday and cheered for Rich from the sidelines! Incredible. There could have been a big scene, too, had she wanted to make one, as her next door neighbor Two Meter World Cup trophies were displayed on a table on the second day . . . as usual. . . to Goodies and more goodies. A prize for every- get the troops into a more competitive spirit! The big-un is the perpetual M.A.N. World Cup. body who competed. Radios, kits, more! OCTOBER 1983 21 PRODUCTS IN USE DSC ships its Pov/rtow in two separate boxes Harry Middleton and Baron Mludek eagerly helped out with the assembly of the Pow'rtow because of UPS weight limits. Small box con which took all of about 15 minutes. Motor comes mounted to plate, you bolt plate to frame. tains winch motor, large one has Retriever. DAVEY SYSTEMS POW’RTOW AND RETRIEVER By BILL FORREY . . . Our R/C Soaring columnist journeys into the realm of product evaluation with his review of the Davey Systems Corp. Pow'rtow and Retriever. So you want all the whistles and bells? • In the course of the testing and the purpose of a product review. review is a more detailed description of evaluation of the Davey Systems Cor Actually, this is a review of two sep each and an evaluation of the perfor poration Pow’rtow winch and Retriever arate products. It just so happens that mance of each. system, two questions were almost they work very well together and are POW’RTOW WINCH always asked by interested glider guiders made by the same company. Very brief I’m going to describe this product to right away. They were: “ Does it work?” ly, the Pow’rtow is a 12-volt, multi you as if we were both in my garage and, “ How much does it cost?" It seems feature winch with a low current drain, looking at the thing. Take a good look at that most people were more interested industrial motor. The Retriever is also a the pictures of the Pow’rtow. As this in the how and the how much than they 12-volt device, and as its name tells you, article continues, you may wish to refer were in the fine points of what the it retrieves the winch line by means of a back to them, so fold over the corner of individual components were that made large, fiberglass-nylon, five-spoke BMX this page of the magazine to enable you up the system. I wish this review could wheel used as a take-up drum. Both to get back to this page easily. be a simple as two easy answers: yes it devices are well designed, functional, Okay .. . the first thing you’ll notice works, and it costs X amount of dollars, good-looking, come with complete about the Pow’rtow is the elevated take- but that would leave a score of other operational instructions, and are rea up drum. The dimensions of the drum questions unanswered, and that is not sonably priced. What follows in this are: width between flanges, four inches Typical launch with Pow'rtow and Retriever in place. Pilot controls Admittedly posed shot of Howard Doering shows how you would winch during launch. Helper operates the Retriever. operate Retriever hand switch and Pow'rtow foot brake in retrieve. 22 MODEL BUILDER Bird's eye view of Pov/rtow. Note single cable Turnaround is elevated. Bicycle hub is used as Rear view of Retriever. Framework is light to motor, bearings on both sides of drum shaft, pulley. Insert in ground like a shovel, easy! and strong. Hand switch is removable. The Retriever may be used with other winches; it adds no noticeable Pow’rtow winch pedal. Borg-Warner heavy duty starter switch is in drag to launch;high weeds need to be removed in front of Retriever. tended for use with solenoids. Had a few problems, however. or 10.2 cm (FAI minimum is 7.5 cm); good wind (10 mph or greater), a large thicker line will interest you . . . it’s spool diameter, three inches; flange sailplane (1000 or more sq. in. wing something to consider. One last thing diameter, six and a half inches. The area), and a pilot wishing to strength-test about the winch drum and line: you get Pow’rtow winch comes with 1800 feet of his spars, it might just break, but under a large-sizeparachute (18-inchdiameter) 115-pound, low-stretch, braided nylon normal, everyday launching on a grass as standard equipment. This parachute is tow line. This line is more than adequate field, I don’t see it breaking very often. large enough to allow the winch line to for any glider you are going to launch off As an option, you can ordei your Pow’r drift down wind to the winch and of this winch. Never once during the tow with 160-pound, braided nylon line shorten your retrieval walk. course of testing did anyone break this if you feel like it, but it’ll cost you $5.00 As you can see, the take-up spool is line. That’s not to say that under the right extra. Perhaps if you have a rough field conditions it wouldn’t break . . . given a the extra abrasion resistance of the Continued on page 82 Two really nice features of the Pow'rtow are the tow ring hook (for Pulleys are interchangable between drum shaft and m otorshaft to holding the line when not in use), and the anti-backlash brake. allow variable speed/torque. Comes with extra 2" and 3 " pulleys. OCTOBER 1983 23 Electric Powered By STAN WILSON . . . Here is a simple, semi-scale, electric powered Citabria for you that’s easy to build, lightweight, and a good performer on six cells. Clean, quiet, CITABRIA inexpensive fun, that's what it's all about. • I like my R/C planes to have the look needed by the wing. You may wish to sure to make a left and a right fuselage of real airplanes, and the Citabria has add them for a more scale look, it's up to side. After the sides are dry, place them always been a favorite of mine. The you. upside down, and install the fuselage Leisure LT50 Gear Motor electric system FUSELAGE CONSTRUCTION crosspieces. I start by making the cabin offers some excellent characteristics Begin by soaking the basswood area square and firm. Next, I add the which lend themselves quite well to longerons in water to enable them to cabin floor. This will enable you to draw scale flight and appearance. As the make the correct bends. After they are the tail posts and nose together without Citabria I had in mind was a rather large sufficiently soft, pin the longerons and having a banana-shaped fuselage. model, the climbing power generated uprights on the fuselage side plans. The Score the longerons (slightly) behind by the 11-6 prop seemed perfect for longerons will still be a little wet when the cabin before pulling the tail post achieving scale speed, while not falling you drop Hot Stuff on the joints, so you together. Install the remaining cross out of the sky. With this in mind, I will get excellent bonding. I use Super members at this time. Be sure to go back proceeded to design the model from ‘Τ' Hot Stuff on all joints as filets. and fill in the score with Hot Stuff Super three-views, using “ free flight rubber Repeat this process after the first side ‘Τ' and Hot Shot. You should install the construction” for a light weight model. I has dried to make two fuselage sides. I hardwood wing mounting block at this omitted the wing struts as they only then glue the 3/32 sheeting along the time. You will drill and tap it later to added drag, and no real support was nose and cabin sides as indicated. Be accept the nylon wing bolts. Stick and tissue type construction allows for a very light airframe. Shown are all components of the Citabria ready for covering. Note Cannon radio system. Leisure geared electric motor, 6-cell motor battery 11.2-amp cells), preformed landing gear, and wiring harness with switches. 24 MODEL BUILDER ...... ^ * / V V M *I ■ '/ ov* r>? f r ' A*> X tť f* J)X* 'Λ ^ > u i C a 'A! S*g*-c**éi a ' / * W >/$'& 3.JB z — - r **>Za . ■»"V’ , ______^ ______— ' aWnm ^/VW * / (fr, y4y A a cifa í wh-M v*!· {fa‘fy . -Α&',/ί Aíř J- Shock-absorbing mount allows nose impact WING without damage to motor or gears. Unit is The wing can be built for aileron Flipside of motor mount. Springs and blind suspended by small springs. See text. control or without it. Pin the leading nuts clearly seen. This side front, from inside. 26 MODEL BUILDER Beehive R/C Model Aircraft's Kloud King rests on the deck of an abandoned, WW-II airstrip (left) on the island of Maui. Al Tuttle, who lives and works on this island paradise in the state of Hawaii, uses this field on lunch breaks to fly his Kloud King . .. eat a sandwich, fly a model. FUN! PRODUCTS IN U$E Beehive R/C Model Aircraft Co. By AL TUTTLE .. . The Kloud King is an Old Timer that is available in two forms from Beehive R/C Models. You can buy it all framed up and ready for covering, or as a partially assembled " k it" as you see here. • The Kloud King is an Old Timer side window material. struction of the wings, wing center model, circa 1938, for free flight or R/C All individual assemblies such as the section, and empennage. There are assist. It is available either fully-framed rudder, vertical stab, horizontal stab, seven pages of printed step-by-step and uncovered, or in kit form with the wing, etc., are precut and packaged instructions, plus twenty-three assembly fuselage sides prebuilt. This review separately which makes for easy iden detail sketches. concerns the latter. (Guess who is doing tification. The holes for the control The fuselage is assembled by install the review on the fully-framed one?) surface hinges are even drilled! In ing the front cabin former and firewall to The kit is packed in a box fifty one addition to the prebuilt sides, there are one of the fuselage sides, installing the inches long, by eleven inches wide, by two preconstructed crutches, which opposite fuse side, and then adding the four and one half inches deep. when installed, form the top and bottom rear cabin former and the prebuilt top Hardware includes formed, 1/8-inch rear crosspieces that automatically crutch. diameter steel wire landing gear, tail shape the fuse when pulling the aft fuse The tail posts are brought together, and wheel assembly with a 3/4-inchdiameter sides together. while being held by clamps, fuselage Perfect wheel, Robart hinges, nylon Plans are of the blue line Ozalid alignment is checked. After alignment, control horns, formed windshield, and variety, and are used during the con the tailposts are glued together, and the top crutch is glued to the fuselage sides. The fuselage is then turned bottom side up, and the prebuilt rear bottom crutch is installed. With the help of Hot Stuff, the preceding took me approxi mately one hour to complete. Triangular braces, landing gear platforms, etc., and rear top formers were installed. The top rear stringers are 1/8-inch by 1/4-inch spruce. Because of the sharp curve on the top corner stringers that run up to the cabin, these stringers are laminated from 1/8-inch sauare spruce. This was a nice touch, and made what could have been a tough job, very easy. Instructions call for a removable hatch, but I chose to make mine an integral part of the fuse. However, before installing it, I built a floor to hold the fuel tank. The tank is easily acces sible from the cabin. The wings and center section were built next. Here, one has a choice of three options: solid, one-piece wing; both wing panels removable; or, one wing panel only removeable. Being lazy, Al's Kloud King makes a sweeping low pass over the runway before pulling up to play near I chose to build a one-piece wing. The the clouds. With a setting like this, you would be tempted to fly every day! wing panels are built first, and then used OCTOBER 1983 27 The Kloud King flies well on a four-stroke .45 with an 11-6 prop. Using a 10-ounce tank will give you loads of flying time between fill-ups . . . would you believe 45 minutes worth? during construction of center section. beginner until he can land with no Empennage construction is straight problems, then by all means, build this forward, and as mentioned earlier, holes for a first airplane. The instructions and for the Robart hinges are predrilled. sketches are well done, and easily Even so, check for alignment prior to followed. On this particular kit, all parts assembly. Mine happened to align fit well, and the quality of wood was almost perfectly. The empennage can good. The Kloud King in its "k it" version comes also be made removeable. Here again, I I have only two criticisms, and these p a rtia lly assembled, as you see here. chose to attach it permanently to the are meant to be constructive: the fuse fuse. lage sides and crutch balsa cross and I covered the airframe with one of the vertical members were too soft, and I new low heat fabrics. The fuselage is was continually breaking them during blue, and the wings and empennage are the course of construction. The landing yellow. Nothing fancy, but it does look gear should be made of 5/32-inch quite nice. diameter steel wire rather than the 1/8 A four stroke .45 engine swinging an inch diameter wire furnished, which 11-6 prop provides the motivation. splays out violently during landing, and Radio is a Kraft Series 74, KP-7Z with takes a permanent set. I realize that my KPS-24 servos (Mode 1, of course). ship is a bit on the heavy side, and with The Kloud King’s dry weight, ready- the 1/8 wire gear, the airplane hops to-fly, is 5 lbs even. I am using a Kraft 10 down the runway during landing like a oz. tank, which results in approximately drunken kangaroo on a pogo stick. 45 minutes of flying time. A six-ounce If you want a fun ship that is quick to tank would be perfectly adequate. build, this is the way to go. It took me Flying this thing is an absolute gas (no only two weekends from the time I pun intended)! Actually, it flies by itself, started construction, to the day I flew it. and an occasional nudge of the rudder Construction time was approximately 32 and or elevator, keeps it within range. In hours including covering. Hot Stuff fact, what with the gentle purr of the adhesives were used throughout, which four stroke, and the plane just ghosting contributed greatly to the fast construc around the sky, it is difficult to stay tion time. (Fast for me that is.) awake. Talk about laid back flying . . . Our flying field is two miles from ridiculous!!! Even though this is an where I work, and as I have an hour for extremely easy aircraft to fly, I hesitate to lunch, I manage to get in a 30 to 40- recommend it for a first airplane, as it is minute flight several times during the fairly “ tender,” i.e., the empennage/aft week. The thermals are booming at that fuselage area is weak, and can be easily time, so I actually do more soaring with it broken in a cartwheel. Of course, if than anything else. Try one, you'll like it! Joining the fuselage sides together at the there is a qualified instructor to help the Aloha, Al Tuttle, Maui, Hawaii. · tailpost is a snap using Hot Stuff. There’s plenty of room in there for your servo installation, fuel tank, The top corner stringers which you see curving up to the cabin are radio receiver, etc. laminated from two 1/8-inch square spruce sticks each. Easy! 28 MODEL BUILDER 1. This group photo was taken at the annual Salinas Area Modelers Old Timer contest. For a complete description of all the models and pilots, see the text. Original photo reveals just how brightly colored these O/T models really are! Looks like there was good flyin' weather! CHAMPS-II” and .020 Old Time Replica (gas). The opening day, Saturday, will be devoted to flying scale models designed by Joe Ott. Incidentally, Ott is putting up the trophies for this most interesting p w s m m meet. By JOHN POND To round things off for the rubber fanatics, a CO2 Old Time Replica event will also be held on Saturday. Naturally, with such a prestigious • West coast old tim er contests are becoming overwhelmed. location, dinner on Saturday night will undergoing considerable changes as the Hence, contests (like the contestants) feature French cuisine! Man! Is this contests themselves are becoming ever are improving immeasurably from the meet ever going to be fancy! more competitive with each other! With standpoint of organization, operational Talking about gimmicks, the Salinas at least six major SAM Chapters hosting efficiency, and of late, highlights such as Area Modelers have a group picture contests, all of them devoted to O/T R/C barbecues, luncheons, and victory ban taken at 12 noon on the field every year. flying, contests are coming at such as quets. The latter, of course, was first At the Saturday Awards Banquet, every rate that the average competitor is instituted at the John Pond Com contestant is given a large 8 x 10 color memorative held annually in the San photo as a memento of the meet. Photo Luis Obispo/Santa Maria area. This No. 1 shows exactly what we mean. proved so popular that most contests are Rather than give a description of the now two-day affairs with the Saturday meet, we will show all the contestants in evening generally reserved for a semi- formal banquet. This has led various chapters such as SAM 49 and SAM 30 to put on lunches devoted to hamburgers, hot dogs, and beans. The Salinas Area Modelers (SAM) have gone them all one better by offer ing breakfast and lunch on the field at very nominal prices! Imagine getting up 2. Frank Swaney, Jim Kyncy, and Speed Hughes admire Lanzo Record Breaker. late, yet having enough time in the early morning to get a plate of bacon and eggs! Of course, there is always the quickie breakfast, coffee and dough 4. Jim Parsons flew a brand new Ehling 4-1/2 nuts, but the custom set by Jack Jella of Hour Flyer. Powered by Merco 49. the SAM generally offers these goodies at the field all through the morning. In short, you have your cake and eat it too! Probably the most enterprising offer yet made is the two-day event being put on by SAM 27 (Don Bekins, CD) a» the Olive Ridge Tennis and Racquet Club located at Black Point, Marin County. This contest will be held Sep tember 17th and 18th, and will feature only two gas events per day. In collaboration with this meet, the Marin MAC division of SAM 27 will offer 3. Tragedy! Frank Swaney rekitted his Lanzo two rubber events per day. Sunday will 5. Side view of Parson's Ehling 4-1/2 Hour after it flew out of his range of vision. see the “ PACIFIC ACE WORLD Flyer. Administrators appear comfortable! OCTOBER 1983 29 6. Jack Alten is ready to grab hold of Jim Kyncy's reduced scale. 7. Don Bekins' new Hornet 60 powered Valkyrie is the model to Class C Anderson Pylon O/T just as soon as Jim gets her going. beat! John Pond holds. the photo and what they were holding at SAM member with his Scientific Com the time. modore. Up and to the right of him is Jim At the very left is an unknown SAM Parson with an Ehling 4-1/2 Hour Flyer helper with Walt Parker, the Chef, Chief powered by a Merco 49. For a new Cook and Bottle Washer, etc., etc. comer, Jim has been doing very well. Kneeling in front is Ed Solenberger with Next we have the old man, John a scaled Playboy jr. utilizing a McCoy 60 Pond, with his equally-old, white and for power. Ed eventually won the fly-off red Dallaire. This meet was a particularly against Doc Patterson. bad one for the old master as he ruined Continuing to the right is Jack four models in four events. You won’t Albrecht with his double-size Kerswap see that Dallaire again as it lost a half powered by a McCoy 60. Does this wing at 1,000 feet altitude. There were model ever perform with a McCoy 60 no pieces longer than six inches left! (I that sounds like a glow engine on would take this to mean that the half ignition! Jack is a real threat at any time wing went 0 0 5 . . . right )ohn? ... It to win Class C. The hot performance is happens to the best of 'em. wrf) no doubt due to the cross-section rule Holding a Hornet powered Sailplane being dropped in 1941 thus allowing is Don Bekins with his new recruit on his much sleeker designs to compete. As right (name unknown). This is the in Harry Murphy, newsletter editor of the famous model that hit the outhouse at C.I.A. "Informer” so astutely pointed Marysville. Don has since continued this out, the cross section is what holds the 10. Old time engine manufacturers. Dan practice, and is rapidly earning an Bunch and "Bud” Warren have fun at one of unenviable name. performance on a more equal basis. their hydro meets. Aircraft were Scorpion Anybody out there care to expound on a Majors. High rudders aided hydro stability. Next to Pond, kneeling, is the “ King” , scientific basis? Otto Bernhardt, with his old, rebuilt Directly in front of Jack is Jim Adams, Directly to the right, in the back, is Lanzo Record Breaker. This model also the most successful newsletter editor another Cumulus being held aloft by won the Beauty Award. Truly a shame SAM has ever had. Jim showed up with a Paul Forrette. Paul is the modeler who the model cannot be seen in plan form. brand new Playboy powered by a Super flies the Peerless Panther, a low wing Behind Otto is Nick Nicholau, the Cyclone. Lest we miss him, the Contest design, in the 1/2A Texaco event, and spark plug of SAM 30. Nick has built Manager and CD, Jack Jella, stands next never fails to place. At those altitudes, most all the models presently being used to Ray Van de Walker holding a Shere- you can’t tell the difference between a by SAM 30 members, and a few out shaw Cumulus originally powered by an high wing or a low wing! siders. For a change, "O ld Weak-eyes Ohlsson 60. Down in front is another unknown Nicholau” was able to keep his Miss 8. Bob Nichols cranks up the Turner Special belonging to Judith 9. Cedric Galloway's first original design control line model. Flew Anderson (background) who appears to be doing a preflight check. with Ohlsson Gold Seal engine. The year was 1943. 30 MODEL BUILDER 12. Reg Parham's 1939 Wakefield design took second place in a re 11. Kelso Barnet, of Universal City, Texas, built this neat 1/2A cent Odiham Vintage Wakefield event in England. Keith Miller photo. Texaco version of Pete Bower's F lybaby. America in sight and gain a second Wallock is donating the perpetual! mick(s) these days! (As if the $500 prize place in Texaco. Getting on with the contest report, we money isn’t enough! The other gimmick Kneeling to Otto’s left is Don Carrl might sneak in a plug for Frank Swaney, is only $1.00 entry fee for all events!) who loves to fly the smaller models. His shown in Photo No. 2, for his “ Fly-For- Photo No. 2 shows Jim Kyncy and Gas Bird or “ Diamond Zipper” as Carl Bucks” contest as sponsored by the Speed Hughes assisting Frank Swaney Goldberg calls it, is a combination Class editor and publisher of the Colusa Daily, with his Lanzo Record Breaker. Unfor A-B utilizing ignition McCoy 19 and 29 Henry Johnson. To publicize the meet, tunately someone forgot to tell the timer engines. Don has been successful in Frank, along with Neva Nicholau, was that Swaney’s eyes were bad, and the lightening the model to the point where giving out bent (or crooked) ball-point model would go out of sight in short the glide is halfway presentable. pens with the slogan, “ Straighten Up order. Standing in the rear is "O ld Fence and Fly Right with Frank Swaney” in Photo No. 3 shows the results! (See, Buster," Al Staben, with an O.S. 60 four scribed on them. Ya gotta have a gim Pond? You're in good company. Our cycle powered Dallaire Sportster. Al finds this is one of his better flyers. Kneeling in front are Bill Bowen, Doc Patterson, and Loren Schmidt. Bowen has a scale Baby Playboy with a Schneurle Torpedo 19 that suffered from engine run problems. Doc Patterson is holding his favorite, a Spitfire powered Ander son Pylon that is always a threat to win the Antique Event. Alongside of Doc is Loren Schmidt with one of the wildest (and overpowered) Rangers this writer has ever seen. It is amazing he hasn’t stuck it in the ground more! To wrap up the photo, Jim Kyncy is holding a scaled down (for a change) 13. Dave Baker took this remarkable photograph of Mario Gandolphi with his Shereshaw Anderson Pylon with a Hornet 60 that Cloud Cruiser under an English sky which actually cooperated with a little sunlight! just paralyzes the competition in Class C. Hopefully, next year the 55-second motor run will be reduced to the point P e g a s u s where you can see the models! DRAWN ΘΥ ALLEN POND WEST COAST CHAMPS 0 12 3 Along with all the gimmicks to attract 1 i I i I i i i I i I i 1 the contestants, SAM 21, with John Pond SCALE as contest director, offers you the West Coast Champs at the Dichondra Ranch as an inducement to fly off of the finest flying field in the world. Imagine, 200 acres of nothing but dichrondra grass!! In keeping with the status of the West Coast Champs, over 21 trophies will be awarded with 40 merchandise awards! This should make the boys turn out! Also, of special note, istheannounce- ment by the SAM 21 boys that next year’s meet will feature low-wings. In this meet, all types are eligible, but any low- wing design will receive a 50 percent bonus in time up to a “ max” flight. This low-wing event is something that Gene Wallock of the SCAMPS has been after this writer to do for a long time. With one year's notice, we’ll see how they turn out! (Contest details are discussed at the end of this article, wrf) There won’t be any shortage of trophies as OCTOBER 1983 31 MAZ ORBACK GAS MODEL ASS'N. J.L. Sadler ...... — ...... Presid ent c~^~*** ...... 5 /3 JIT. Ckrk St.r Little Pock, A rk ...... NATIONAL RECOGNITION __ Tkd Kleuser, V. Pres. John Worthed. Theas. H .A . Th o m a s . Sec. S.R. J a c k m a n , P u b lic ity 15. How about this letterhead for a bit of nostalgia? Note who's president . .. old "Kingfish" himself! condolences, Frank, wrf) By the lime the shows Bob Nicols starting up the engine CLASS B TIME timer looked up, the model was in a dive of Judith Anderson's Turner Special. It’s 1. Ed Solenberger (unkwown to Swaney). Too late! Truly a really great to see teams like this! (Playboy Jr/Torp 29) 20:33 shame as this could have been easily A lot of the readers have been asking if 2. Nick Sanford (Playboy Jr/McCoy 29) 19:30 avoided! we would list the model and motor used For the first time out, Jim Parsons 3. Don Bekins (Alert/Torpedo 29) 11:19 (Photo No. 4) did really well with his by the winners. We’ll try to do our best CLASS C TIME with the following results: 1. Jim Kyncy (Anderson Frank Ehling “ Four-and-a-half-hour Pylon/Hornet) 30:57 Flyer” powered by a Merco 49. Al 2. Ed Solenberger (Playboy Jr/ though the model came out heavy, the CLASS A TIME McCoy 60) 30:45 design glides well. Looks like we have 1. Loren Schmidt (Ranger/Torp 19) 13:09 3. Don Bekins (Sailplane/Hornet) 30:04 another competitor! 2. Don Carrll (Gas Bird/McCoy 19) 9:36 Although we are again showing the Con tinued on page 94 Ehling model, the main reason for Photo No. 5 is to show part of the crew in the background, Sandy Alten, Maryann OLD TIMER Pond, and Robert Pond. Will you look at Model of the Month WEDGY Designed by: Leon Shulman Drawn by: Al Patterson Text by: Bill Northrop • Can you it? An Old Timer on left (looking from the top rear), which which it’s easy to install a dethermalizer overcomes the right glide turn during 14. Chuck Provance, of Wyoming, sent in this (scuse me . . . DT)! With the simple powered flight. Note that the motor shot of his Plecan Simplex which is powered addition of a stab platform and a leading mounts bolt in separately, allowing for by a P.A.W. 2.46 diesel. edge guide, the stab on Leon Shulman’s ease of engine changes and thrust Class A 1940 Nationals winner can be adjustments. that tremendous expanse of dichondra popped up to the usual DT angle with- All flying surface construction is basic, grass!!? out gross modifications to the model. As for the wedge-shaped fuselage, Photo No. 6 shows what can be done “ Wedgy” was featured in the Novem- begin by building two sides, including by scaling the Anderson Pylon model ber 1940 issue of Model Airplane News, the hardwood and balsa engine bearers down to Class C size utilizing a Hornet fresh after its record setting 22 minutes and the 3/16 sheet side cowls. To motor for power. This has proven to be plus flight at the 1940 Nationals. The assemble, lightly clamp the sides to- an excellent flying combination. Jack deep, triangular shaped fuselage, some- gether at the bottom longerons, spread Alten, acting as mechanic for this flight, what reminiscent of Frank Ehling’s 1938 the top longerons apart the required offers a few sage words of advice on “ Triangle” design, made it immediately amount, and glue in the cross-pieces, starting ignition motors. identifiable. The win was not a fluke, as Taper the cross-piece ends carefully for Following that is Photo No. 7, showing Wedgy placed among the first three in a snug and solid fit. Now glue the that gorgeous, classic Goldberg design, every contest entered. bottom longerons together, install the the Valkyrie. This one powered by a The model balances at 1/3 of the landing gear, sand the bottom long- Hornet has proven to be a superlative chord back from the leading edge of the erons to a flat outside section, and add flyer. Pond holds on to the wing. 42-inch span wing. Wash-out is built into the 1/4 x 3/8 cap strip. (Original text says Might also mention that Bekins tore the outer panels, preventing unwanted 1/8 x 3/8, but the drawing showed and up a Torp 29 powered Class B Playboy at tip stalls. The flight pattern is a tight left- called for 1/4 x 3/8). this meet, and in its downward plunge, hand spiral climb, followed by a right The original model weighed around the model hit the tree sheltering . .. the turn floating glide. With the wing and 17 oz. with silkspan or double-tissue outhouse! Missed it by two feet!! Well, stab incidences shown on the plans, try covering and two coats of dope. A glow- we all have to be famous for something! for a smooth flat glide with a slight right powered model should be even lighter, Let’s shift gears here and take a look at turn. Thrust offset is three (3) degrees Wing area is about 285 sq. in. · the distaff side of things. Photo No. 8 32 MODEL BUILDER OCTOBER 1983 33 Walt Schoonard, the man behind Miniature Now the product review on the Competitor helicopter from Gorham Model Products is com Aircraft Supply, proudly displays the new plete. If you want to know more, see the August and September Chopper Chatter. Superior. More details next month .... helicopter (say 15 inches) and you have a 13-inch hover from the ground to the helicopter’s skids. Anything above 13 inches will require more power and pitch. This is why fixed-pitch helicopters are more difficult to land than collective pitch helicopters. With a fixed-pitch ship, rotor rpm must be reduced to reduce lift. As the helicopter gets within a foot off the ground the effect increases CHOPPER so rotor rpm must be reduced more yet to get the ship on the ground. By the time the helicopter lands, rotor rpm can By RAY HOSTETLER be decayed to the point where the PHOTOS BY AUTHOR CHATTER control system is not nearly as effective as it was at a three-foot hover. Tip-overs • After the last three months of reviews longer to work on each air molecule, are more likely to happen during land- and flying different ships, a few things (and there is less induced drag, but I ig because control effectiveness is have jumped out at me that I feel I want to keep it practical. . .) so the rotor significantly reduced. should pass on to you, so it’s .. . becomes more efficient and requires On the other hand, with a collective BACK TO BASICS less blade pitch (and therefore less pitch helicopter, lift can be directly Earlier this year we looked at rotor power) to hover close to the ground. See reduced through the lowering of each heads, Bell vs. Hiller, degree of head Figure 1. blade’s (collective) pitch, without sacri rigidity, and how it affects the control- Many of you think of ground effect as ficing rotor rpm. Therefore control- ability of the helicopter, etc. A part of a cushion of air under the helicopter. liability is greater and a tip-over is less head rigidity that I did not cover was While an engineer would tell you some likely to occur. how the different heads act in forward thing like what I have described in the If you want to play with ground effect, flight. So I'm going to take a helicopter last few paragraphs, thinking about a hover at three to five feet and reduce at hover and explain what happens as it cushion of air is a good way to visualize collective/throttle slightly. The heli hovers, departs from a hover, and goes what’s happening from a practical stand copter will drop down lower but will into forward flight. point. continue to hover because of the in HOVERING Ground effect is most noticeable up to creased ground effect. If ground effect In a hover, the helicopter essentially one-half rotor diameter above the did not exist, the helicopter ought to sucks in air from above and displaces it ground. If you have a 56-inch diameter descend all the way to the ground. downward. In order to hover, sufficient rotor, the rotor disk will be most effi Ground effect has been given a lot of air must be induced through the rotor cient up to 28 inches off the ground. flack, i.e., “ Get the helicopter out of disk to equal the helicopter’s weight, Subtract the vertical height of the ground effect and it will flysmoother...’’ otherwise it would not be able to hover to start with. This is why a helicopter’s induced flow (air sucked down through the disk) increases in velocity as the V I Hll' helicopter gets larger. More weight, more air. In some of the larger full-size ships the induced flow reaches 100-150 mph! (You could really get a good "dusting" in that kind o( hurricane! wrf) A HOVER NEAR THE GROUND When a helicopter (model or full-size) hovers close to the ground, it is called an IGE (in ground effect) hover. Ground effect comes from the ground restrict ing the induced flow through the rotor OUT OF GROUND EFFECT HOVER, disk. As the ground slows the induced W IN D C A L M flow, each rotor blade has a little bit FIG.2 34 MODEL BUILDER FLYING FORWARD AT 5 KNOTS RELATIVE WIND ___ m~ * x GROUND EFFECT DISRUPTED; HELICOPTER NOT YET IN EFFECTIVE FLYING BACKWARD AT 5 KNOTS TRANSLATIONAL LIFT. GIVES "DISH OUT" DURING TAKEOFFS. r-,~ o RELATIVEWIND FIG.4 WIND 5 KNOTS OR LESS or, “ Ground effect crashed my heli hover at six inches to a foot above the its way back through to the tail rotor. copter because of bumpy air.. ground. It had to depend on ground Because the tail rotor now has to work in For the most part, I wouldn't believe effect to fly at all. turbulated air, tail control may be those excuses. Yes, you can get low-level In all of the preceding paragraphs I inconsistent or jerky. Also, the larger the turbulence close to the ground in some have assumed a calm wind. Let’s see canopy is, the more this air may be cases, but it is mainly the pilot over- what happens when the wind is not turbulated. Notice, too, how the incom controlling the helicopter because he calm. ing air is starting to come from forward fears the ground itself to start with. THE RELATIVE WIND of the helicopter. My advice to beginners is "keep it in Einstein would have made a good This is also the point where the heli ground effect.’’ If the helicopter starts to helicopter pilot. I’m sure he could copter is not in ground effect anymore, get away, smoothly reduce throttle and understand the relatively of one thing to however, the helicopter has not yet let it settle back in, and try again. It is another. picked up effective translational lift much harder to “ reduce throttle and let If your helicopter is hovering and a (which will be discussed in a moment). it settle back in” from a three-foot five-knot wind is blowing, the five-knot This situation requires more power to fly hover! wind can be called the relative wind. than hover, and more power than in A HIGH HOVER Relative wind is the incoming airflow forward flight. It is characterizied by the Out of ground effect (OGE) is essen to the helicopter itself or to the heli helicopter dropping down slightly or tially anything above a 13-inch hover. It copter’s blades, which ever example we “ dishing out’’ as I prefer to call it. To play will take more power and more pitch care to look at. First, let’s consider the with this, try taking off sometime with because there is nothing to restrict the incoming airflow to the helicopter itself. out adding any additional throttle/ airflow as it passes through the rotor Relative wind to the helicopter can collective. If the air is dead calm it will be disk. In other words, the air passes also be described as being opposite to difficult to do as there is such a long through the disk faster with decreased the helicopter’s direction of flight. If the delay between losing ground effect and efficiency because each rotor blade has helicopter is flying forward, the relative picking up effective translational lift (or less time to work on each air molecule. wind comes from the windshield back ETL for short). If there is just the slightest See Figure 2. over the entire ship. If the helicopter is breeze the gap is minimal and the In all full-size helicopter flight flying backwards the relative wind dishout will hardly be noticeable. manuals, hover ceiling is given in IGE comes at the tail first and then passes In Figure 5, I have given a 10-knot and OGE. If you take any helicopter it over the rest of the helicopter. See wind. Notice how the air is being sucked will hover (at sea level) at three feet or Figure 3. in from above the rotor disk, and that thirty feet. However, take the machine Once there is a headwind, the incom the tail rotor is out of the turbulated air. up to 7,000 feet and it may barely hover ing air starts to distort or disturb the flow EFFECTIVE TRANSLATIONAL at three feet and will not hover any pattern of the rotor's induced flow of air. LIFT, OR ETL higher. My point is, the different in the See Figure 4. Let’s say this is typical in a With the condition shown in Figure 5, power required between IGE and OGE hover with five knots of wind, or in slow the helicopter is said to be in, or passing means the difference between flying forward flight with the wind calm (same through, effective translational lift. and not flying in some areas. For in relative wind). Notice how the smooth Notice that the incoming air at the front stance, last summer at the Grand airflow pattern is disrupted. The tur Canyon, my SuperMantis would only bulence from the front of the disk works Continued on page 71 100 MPH FORWARD AIRSPEED RELATIVEWIND r "RETREATING" "ADVANCING" 1 V B L A D E B LA D E - ) f l 4 0 0 400 Λ y +100 - 1 0 0 = 50 0 i y - - Γ r = 30 0 B L A D E I / B L A D E A IR SP E E D / AIRSPEED (MORE LIFT) I f (LESS L IF T ) 200 KTS DIFFERENCE CAUSES DISSYMETRY OF LIFT FIG.8 OCTOBER 1983 35 Roland Spicer's record setting Bellanca Skyrocket, built along with a sister ship in five months. Has a built-in nine gallon tank, although she took off with only 6-1/4 gallons. After the 454 mile flight, the Bellanca had a little over a gallon left. Roland has plans available. This is the Type 5 ignition module as described in the text. It does wonders for any engine that uses magneto ignition systems with points and condensers. It eliminates the points and condensers and adds spark advance. Just nail it to the firewall and connect two wires .. . get ready forsorne fantastic flying! can’t have one without the other, and I just found a way to make that gas burner of yours a lot more reliable. It’s kinda hard not to be skeptical about anything touted to make our engines run better because there have been too many "things” . .. mechanical, electrical and liquid . . . that have come down the pike and have been made to IS MY TUSH FACING May I direct your eyeballs to the sound like THE only salvation for BIG THE WRONG WAY? photo of the newsletter masthead. Now Bird Lovers. Unfortunately, their ideas as That’s the big question. According to I k now that very few of us are experts, or to what’s good rarely stands up to the a number of folks, my tush is most even knowledgable, about a bird’s tush acid test . . . flying. definitely out of alignment. As they . .. any bird's tush . . . and I also know So when Jim Hursh, a new "kid ” in the couldn’t possibly be referring to my own that whatever is in the logo normally neighborhood, began extolling the personal, still youthfully slim, supple, does face the center of the page. How virtues of a 1 in. x 3/4 in. electronic and sinewy body, their comments must ever, in my defense, let me point out module that eliminates the points, is be aimed at the logo on our (Puget that in keeping with the true spirit of the ridiculously easy to install, and en Sound Rocs) newsletter . . . which is name of the newsletter, the Roc is hances performance, I immediately aptly named, “ The Roc’s Droppings.” perfectly positioned. Consider how he’d asked for a demonstration (while trying I was expecting some kind of feed look if I were to turn him around; he’d to hide my excitement). And demon back about the newsletter: you know, no longer be able to contribute heartily strate it he did, using a 1.9 Roper. Now I like, “ It’s really good” . . . or, “ It's really to the newsletter pages, and without this have never seen an anywhere-near-stock lousy?” . . . or whatever. But instead, humongous legendary bird doing his Roper run worth a damn; they've all most everyone seems to be up tight thing, “The Roc’s Droppings” would been hard to start, rough running, and in about the direction the Roc’s tush is now have to be renamed. general, cantankerous . . . and always facing; these same people insist that I Whadyathink? fell short power-wise. goofed and should have the BIG Bird RELIABILITY However, after seeing and hearing turned around. It goes hand-in-hand with safety; you Jim's Roper before and after this com- Here's the tush that caused all of the controversy. There really is no On the right is a stock Mag-Aero, on the left is a Mag with the high other way for the Roc to face; if his tush were facing the other way, performance head. There is a big difference in power between the "The Roc's Droppings" would have to be renamed! two. Another contributing factor is the "velocity stack" on carb. 36 MODEL BUILDER You might be able to get these modules at your local chainsaw or small engine shop, although experience indi cates that many dealers don’t carry them because the chip makes your engine too reliable and dependable . .. The best and fastest way to get yours is to write to Jim Hursh at 22909 41st Avenue, Ct, East, Spanaway, WA 98387. Postage is $1.50. although Jim mentioned large orders might be free of postage. THESE DO WORK! AUTOLITE NO. 85 Shortly after moving up here to "God’s Country,” I mentioned that some of the natives were using Autolite 85s in their Quadras with good results. I finally got around to trying one, and my Quad seemed to run as well with the No. 85 as it did with the RCJ-7Y. A few flights proved to me that this Autolite matched the 7Y's capability for more power without detonation ... which was un Steve Stephans, of Roy, Washington, cranks up his new Balsa USA Flybaby. The subsequent expected because the 85 is supposed to test flight was uneventful.. . Steve not only turns out fine looking birds, but he also pays at have the same heat range number as the tention to details . . . like balancing, checking thrust and incidence angles, etc. RJ-13Y and, in fact, is supposed to be a outer ignition chip was installed, I had to against the firewall, and made the two replacement for this Champion plug. have one also . .. because, guys, it's like connections using the twist caps that are The price for the Autolite 85 is right a miracle; the engine looks the same, included. Soldered connections might . . . about a buck-and-a-quarter, and but runs and sounds like you just had give some of us additional peace of they are readily available. The only some very expensive rework done. Jim mind, although these caps really do lock “ bad” part about this plus is its physical says he’s seen a bunch of different on, and Jim’s had nothing loosen up in size; like the 13Y, it sticks out 2-1/4 engines with and without this chip well over two dozen flights on his most- inches, while there's only 1-5/8 inches of installed, and that every engine ran modified Da Giant Stick. the 7Y that protrudes from the head. better and smoother with it. It couldn’t By now you’ve noticed that I haven’t This certainly could be a problem for be more simple to hook up (the instruc said anything about the price, so you’re those who have to cope with a small cowl. tions are complete and easy to follow): probably getting ready to either sit Bruce Edwards, one of the guys who's just connect two wires, one to the coil, down or brace yourself before I lower been using the No. 85, has put many and one to ground. This tiny piece of the boom. Are ya ready? Okay, how hours on his big Fleet since switching to electronics simply bypasses the points does $14.95, plus shipping, sound ? That’s Autolite . . . and still hasn’t found any (which can be removed) and automati right! It is a paltry sum, isn’t it? Hey guys, thing to grump about. So, if something cally advances the spark when the even if engine performance remained over a half-inch more plug sticking out throttle is advanced. unchanged, just being able to swap won’t ruin your day, you might try I have no idea how this circuit works, those all-to-often fussy and trouble spending a little less money for a change. or how much the spark advance is . . . some points for a reliable electronic CLEANING PLUGS but it does work and allows the engine system with spark advance is well worth to more closely approach its full poten the asking price. Continued on page 67 tial. In every case, as with the Roper, engines idle better, run smoother, have a more crisp and positive throttle re sponse without mid-range hesitation, and better top-end performance. Prob ably best of ail is the reliability you’ll get from eliminating those pesky points; no more pitting or burning or fusing or floating in oil ... and hallelujah, no more gap to guess at. These modules (by the way, they're made down under in Sydney, Australia) replace the breaker points and con denser in magneto ignition engines and are available in two configurations: Type 5 (green), or Type 7 (blue). Both are the same physical size; it’s just a matter of determining whether your engine has a two (green module) or a three (blue module) leg coil. Typically, engines like the 35cc Quadra, the 1.9 Roper, and the Mag-Aero have only two coil connec tions and use the Type 5 (green) com puter ignition chip. You don’t have to baby these modules; they’re made to mount directly to a chainsaw and to stand up to all kinds of This very impressive and well detailed P-51 was seen at the First Annual Budweiser Fly-In. The vibration. As you can see from the pic, event was held in Petit Jean State Park, Morrilton, Arkansas. The owner's name was not record Jim Hursh mounted hissmackdabonand ed, but he is obviously an excellent scale modeler. Don Langer photo. OCTOBER 1983 37 we can come to getting something for nothing! In my test circuit, which involved a 50 ma charger, with which we intend to charge a 100 ma battery, at the recom mended 10 hour rate of 10 mils, I had to install a 150 ohm series resistor to obtain that rate. By a happy coincidence, this resistor under this condition creates a voltage drop of exactly 1.5 volts across it (see Figure 2), and when the LM3909 is connected to it, with the proper polarity, the LED flashes merrily away, at about a one-second rate. As with your normal LED charge indicator, if the battery is unplugged or the connection is broken in any manner, the LED ceases to flash. The circuit as shown will operate with Ě íJ 3 3 ŽJP3 i l ( Í 3 ^ voltages up to three volts, which is probably as high as you will ever run into with a 50 ma charger as a beginning. But there are so many chargers and so many (äsw w jtäi? · . . . » v battery sizes now, there are some com binations that might result in a higher CHARGING ADAPTERS FOR lator designed to flash light emitting voltage being developed across the SMALL AIRBORNE BATTERIES diodes (LEDs). By using the tim ing dropping resistor. If so, simply divide the It is all jordan Flakser’s fault! In answer capacitor for voltage boost, it delivers total resistance into smaller individual to his letter, back in the July column, I pulses of two or more volts to the LED units, to obtain a lower voltage across mentioned that I had previously written while operating on a supply of 1.5 volts just one resistor. Using arbitrary values an article which I felt thoroughly covered or less". Also, it does this at miniscule to keep the calculations simple, assum the above subject, and offered copies to current drains. The basic 3909 circuit ing a five-volt drop across a 500 ohm those that had missed it and were (Figure 1) uses only 0.32 ma of current, resistor; you would find one volt across interested. Well, we sure sold a lot of which most of us can’t even measure. At every 100 ohms. Using a 150 and a 350 those who had missed it and were that rate, a new, alkaline D cell will keep resistor in series to obtain the desired stamps that the post office has seen fit to that little red blinker going for 5.2years. total, we would be able to draw out 1.5 bless us with, I'm sure modelers the We can put this little baby to work for volts from across the former. country over have snapped them up. us as a charge indicator for those small This simple solution works in this case Anyway, that and a criticism that I read batteries whose charge current is too due to the very small current drain of the in another model publication about the low to light a series LED, as is used for the 3909 circuit. If we attempted to draw a lack of a charge indicator for a 100 larger cells. First, let’s take a look at the higher current from across the series milliamp airborne battery as furnished basic charge adapter, or rate reducer, as resistor, all of the currents would change, with a certain R/C system, has led me often furnished by the R/C manufac causing all voltages to change, etc. But it back to the subject to see if there was turer. It is simply a resistor of the proper works in this case, and leads us to something I might have missed, or if value to reduce the current flow down another possible use for this 1C, as a ... there are some new developments that to the required amount, with the proper TRANSMITTER “ O N" INDICATOR we might make use of. Sure enough, my connectors for marrying it into the Some time ago, another model publi research brought to light a National system. Now, Ohm’s Law tells us that a cation showed a simple LED "o n " indi Semiconductor integrated circuit with resistor in a circuit will cause a certain cator for the transmitter, it was recom many possible uses in this and other R/C voltage drop across it, determined by mended as an added reminder that you applications. It is the LM3909 LED the applied voltage, and by the current had left it on and were running down Flasher/Oscillator, available from most through it. I’m sure you begin to get the your batteries. The idea is not without mail order electronics suppliers, and picture . . . it is this voltage drop that we merit, except that in that case (a simple from Radio Shack (RS No. 276-1705 for are going to use to power an LM3909 LED with a series resistor across the $1.09). circuit, and thus get an indication of transm itter's 9.6-volt NiCd) you are National Semiconductor describes its charging current flow. As that voltage is running the battery down at as much as a LM3909, which comes in an eight pin already there, and is dissipated as heat, 25 percent higher rate. Here comes the DIP package, as: ", . .a monolithic oscil using it for something useful is as close as LM3909 LED flasher to the rescue again! Graph of voltage and elapsed time for charging cycle of Delta Peak Delta Manufacturing BC824 Peak Detector Charger. See text Detector charger. See text for explanation of graph. 1°r a description of its operation. 38 MODEL BUILDER LED H 1.5v —* _____ I______+ + 8 7 6 5 / v w 50 ma 100 100 ma CHARGER BATTERY LM 3909 n - — 1 2 3 4 i ------1------FIG.2 National Semiconductor LM3909 LED Flasher/O scillator IC c irc u itry fo r use as a "Charger ON" light (left), or a "Transmitter FIG.1 ON" light (right). Above: 1.5v from charger leads is accomplished through 100 ohms. It will consume such a small amount of case of the normal eight-cell transmitter one of the small power connectors from current that it can be disregarded, and battery. Sometimes, for another who Radio Shack (such as No. 274-1759, or the possibility certainly exists that the knows why, when they are recharged in No. 274-1551, plus-to-plus, negative-to- little flashing red light will catch your that condition, they go into reverse negative) and you are in business. Do eye at the right time. For this applica polarity, which is not good for the life of not use a phone jack for this, as a tion, I can recommend the circuit in your airplane. momentary short is created every time Figure 3, driving an LED mounted in a Actually, I feel that cycling, for the the plug is inserted in the jack. reflecting chrome holder, such as the sake of cycling, is really important only NEW FREQUENCIES, ET AL! Radio Shack 276-068. to those who fly once or twice every You are probably bored to death with There are bound to be other uses for other month, and during the winter for stuff about the new frequencies and such a handy IC device, and for those of those who are unfortunate enough to be their related problems by now. Unfor you who wish to do your own experi grounded for long periods of time. The tunately, on some subjects, such as that menting, I have a National Semiconduc active flier, who uses his equipment an one, there is unavoidably some repeti tor, specs and application sheet which I hour or so two or three times a month tion from publication to publication, as will gladly share with you for the usual seldom has battery problems. A cycler, none of us knows what the other one is SASE, and your promise that you will the type that tells you elapsed time, is doing. Quite often two or more of us share the results of your thinking with more valuable because it tells you the wind up saying the same thing at about the rest of us. condition of your battery, in a way that the same time. Well, bear with me, I EXPANDED SCALE VOLTMETERS, really matters, the actual capacity. This have to touch on the subject one more CYCLERS, AND SUCH! will allow you to catch that sneaky cell time, though it is on a point that I don't I had a note from Earl K. Purkey, of that has less capacity than it should and is believe has been mentioned in print Morristown, Tennessee, who relates his sitting around waiting for you to take before. experiences in trying to connect a Tower that ” one more flight” before it zaps The subject has to do with plug-in Hobbies ESV to his Circus IV (JR) trans you. crystals, which have been with us for mitter. It doesn't work, and neither does In the meantime Earl, it really isn’t all some time, but which with the advent of connecting a cycler through the charge that difficult to connect a battery test jack, due to an internal diode that plug to any transmitter without one. Use Continued on page 80 permits the charge current to flow in, but nothing to flow back out. This diode is common in a number of the Japanese radios. To my knowledge, it is found in not only JRs, but also in Futabas, Tower System 500s, old Cox/ Sanwas, and the SR Series Airtronics, possibly others that I don't know about. Unfortunately, I am not sure what it’s intended purpose is, and can only surmise that it is in there to protect the battery in case the charger is plugged in with reversed polarity. Though if a charger is furnished (which it is), and a non-reversible plug is used (which they are), the chance of a backwards connec tion isalmost non-existent. Ifthecharger was not already providing the DC neces sary to the battery, the diode would then have a purpose, to rectify, but that is not the purpose either. Who knows? Earl further writes that he has been Mod·! EP 1280 12 Volt ao AH told to just let the transmitter stay on till it stops working, and then recharge, in an effort to cycle the batteries. This I certainly don’t recommend, as another problem might occur, that of reverse charging. NiCds don’t like to go down Technacell 12-volt rechargable, "Solid-Gel" battery for just about any 12-volt field use. below 1.1 volt per cell, 8.8 volts in the This battery is sealed so it can't make a mess of itself or you .. . weighs 8.2 pounds. OCTOBER 1983 39 Associated RC150 chassis hides beneath Associated's Ligier Maserati GT body. Would you believe this car had a half-dozen races to its credit when this picture was taken? It did! R/C AUTO NEWS By DAN RUTHERFORD • Last month we went off on a tangent, PHOTOS 8Y AUT HOR back in. Matching the power to the track talking about the proper approach to and your style of driving is very impor club racing and carsetup.this month it is )ohn is using an older version of tant. Don’t ever forget it! back to business, dealing specifically Delta's slide valve carb on his K&B, this is Don’t mistake my use of the smaller with Associated's club racer, the RC150. the one with a flat plate slide, and I bore inserts for an inability to drive the We left off with the motor/carb setup. believe they are an out-of-production car in a tidy manner. I already do pretty As mentioned, the K&B .21 is an obvious, item. If you can find a used one, pick it well in our club races, but the super and very good choice. Back when a car up. They are very reliable and easy to smooth line is where it’s at. With a teeny like the RC150 was the “ in thing,” we did work with, plus carb tops with different choked area in the carb, such as you get have some reliability problems with bore sizes were also made, allowing the with a .161 insert, you are forced to drive K&Bs; we had to build our own full- knowledgeable racer to tune the power right on the line and to be smooth. You complement rear ball bearings, replace to the track. If all you can find is a Delta can’t jerk the car around because you broken center blocks, replace broken carb with one top, and it measures have to maintain momentum, not hav cranks, and so on. No more. K&B has anything over .200 bore, forget it. How ing the brute power to regain it. Lap fixed all of the problems I know of, and ever, it is possible to fabricate a part times are the bottom line; I fully expect the motor now has the power that made which looks like a washer, slipping it to be slightly quicker with the .161 insert. it the number one race motor a few under the slide, and you can whittle out Then, when the natural rythm of years ago, plus the reliability to easily go several of these with bore diameters smoothly getting though our infield a season at a time between look-sees at ranging from .125 to .200. comes back, going up in bore size the internals. If you are serious about 1/8 racing and should result in even lower lap times The motor that Snyder is using in this just know your next car will be one of with the car squirting from corner to particular RC150 is the 8800 series K&B those hot-tip suspension numbers, best corner a bit quicker. However, even for .21, current at the time, now replaced by choice for a carb is again from Delta, this experienced racers, the first order of a later version that has a chromed back time their current slide valve carb, the business is getting the twisty stuff figured door, stronger mounting flanges for the SVC800 series. There simply is not a out to the max, even if doing so means header, a square heat sink head,and the better carb available . . . which is a good having to sacrifice the straightaway. best internal machining yet with the thing considering the $60.00 price tag on Back to carbs, Dick McCoy offers a finish on the liner being super. The Dirty them! One of the nicer features of this pretty close copy of the Delta number, Racing Team just finished installing one carb is the easily replaced nylon insert and his is less money at around $40.00, of these motors in our RC500, so you that allows you to change the bore size including the changeable inserts. The know you’ll hear more about it asweget of the carb by switching to an insert of a DRT used an early example of the some racing time in. larger or smaller bore. I still use this McCoy carb on the K&B 8800 in the In any case, your club race motor has feature; lately I have found myself RC500 for almost a year, although with to be reliable, it has to put out decent driving too much on the edge, once in the recent change in engines, we also power (no "Killer Motors” required), awhile overshooting a corner, and for went back to a Delta carb. Late word via parts and accessories have to be easy to this weekend's race am actually going Gary Kyes is that Dick has made some get .. . and it has to be fresh. Needle from my usual .200 insert back to a .161 detail refinements to his carb, so it is settings are really no problem if you pay that I drilled over-size from a .125. If that worth checking into. attention to what the motor is telling gets me back to driving the close line, For a low-bucks approach, there are you, but worn out motors don’t always then there are a couple .187 inserts in the literally tons of brand-new Perry small tell the truth. Make it easy on yourself, box. or if things are going really well and bore carbs laying around the workshops start with a new motor. the car is just perf, the .200 insert will go of racers with several year’s experience 40 MODEL BUILDER Bottom view of the RC150. Note huge, homemade Kydex bumper. Top view RC150. Car is currently being raced as you see it, with: strong engine pod and bolts, and ground-flush Phillips head screws. 5-cell batt.; RX on left; uld-style Thorp muffler; MRP clutch; K&B .21. behind them. You see, K&B used to sell dirt in the bore of the crank. In fact, I them to the front-mount pipes a couple their car motors fitted with Perry carbs, always figured the crank, operating as a years ago. If you're buying new stuff, but very few racers used them, instead centrifuge, probably captured at least as you might as well go with a pipe, but throwing them in with the pile of spares. much dirt as the crude air cleaners did! keep in mind that it will run up the left These carbs work OK and can be had for The first real air cleaners I used are side of the radio tray, which means little money. They are extremely sensi referred to as “ thumb” air cleaners, and relocating the receiver. A rear-mount tive to junk in the fuel, however, and MRP imported them from japan. They can muffler really makes the most sense even a very fine hair can clog the idle are still available from MRP and Asso on an RC150, however. Just bolt it on a passage, causing untold frustration. ciated, and I think that McCoy is also homemade extension to the rear chassis The usual mesh fuel filter will not trap stocking them. If they fit your choice of plate. This extension can even function all of the stuff that can mess up a Perry carb, use them. With a Perry carb, they as the rear bumper. carb, you must use the most efficient don’t like to stay attached of their own Muffler/pipe pressure to the fuel tank filter available, which is the FF770 from accord, so a stay of some kind is re is common practice; it tends to give a Delta. If you are using either an Asso quired. I used to bolt a piece of 1/16 wire more consistent run from a full to nearly ciated or a Delta molded nylon tank, to the head of the engine, the other end empty tank. Be careful of leaks, and use virtually the same thing is used as the terminating in a loop that fits the head of lots of fuel line for the pressure line. fuel pickup, this eliminating the need the cleaner. A little bent-in tension on Many times racers will simply take a for in-line fuel filters. the wire will retain the cleaner satis short wrap of pressure line around the When fed only clean fuel, the Perry factorily. On some carbs we have re tank; what they are doing is decreasing actually works pretty well if you adjust moved the thumb element from the their fuel mileage. At the end of the the idle mixture on the rich side (when base and then zip-tied it to the top of the straights, pressure has built up in the set properly, the motor should load up carb. I can recall doing this with OPS and tank, and while the throttle is chopped, and die rich within 15-20 seconds when Supertigre carbs. Most recently, we used this pressure will actually force fuel out allowed to idle without blipping the this trick on a McCoy carb, using seating of the pressure line and into the header, throttle). The only other problem with tape to build up the outer diameter from there it goes out the exhaust. By the Perry is that it simply wasn’t designed enough to accept the element. using a long pressure line, before the to be cycled constantly, as we do with With Delta carbs, use only Delta air fuel can reach the header, you're back race cars. So they will wear out; carry a cleaners; they are efficient, rebuildable, on the throttle. Simple, no? spare with you. and stay on through the most vicious Transmitting all of this carefully No matter what kind of carb you use. crashes. Adapting Delta air cleaners to massaged horsepower to the rear wheels an efficient air filter has to be part of the other make carbs can be tough but is the clutch, and here we made some package. When I started racing, the air worth a try if you’re not satisfied with the changes. The first thing toget tossed was cleaners were a real joke; most were just stock setup. the supplied clutch bell. It is too big the open-cell plastic variety that kept For an exhaust system, most anything (15-tooth, as I recall), plus it has a (gag, the big chunks out but let fine dirt right sold within the past four or five years is choke) simple oilite bushing bearing. in. It wasn’t uncommon to tear down an probably OK. Lots of "can” mufflers are engine and find a build-up of caked-on out there, as most guys switched from Continued on page 79 Delta's latest update kit for the Super Phaser. The Delta steering How badly did you say you wanted to save weight on your Delta blocks feature improved wear characteristics. Threaded axles: 4-40. Eagle suspension car? Steering blocks with alum, bushincp, axles! OCTOBER 1983 41 This may look like a Hotshot 45, but it is really a reduced size version called a Hotshot IV. Beautiful. 10 year-old, Denise Dunlap models This month, Jerry describes how he arrived at his final design, and all of the best mods. her dad's Hotshot IV. "Buy this boat mister?" R/C POWER BOATS By JERRY DUNLAP • We’ll begin this month's column with gained popularity quickly. Most of the race site with fairways (or surroundings, a letter I received from Ed Ryder, presi credit for this can be given to the and a first class cocktail award's party. dent of the Broward Model Boat Club of Georgia and Alabama members. At the Racers joined us from all over the state Coral Springs, Florida. I wish to thank Ed last regatta in Atlanta, Georgia, there and were supported by hundreds of for the informative letter and photos. were thirty-three 3.5 and thirty-one 7.5 spectators. At the Woodmont race, we Wanted to drop you a line and com tunnels. That was almost one-third of added pari-mutuel betting for the bene pliment you on the excellent articles you the total entries. fit of the Lukemia Society with the present in Model Builder. My associate, We consider our club the largest bettors receiving donated prizes. Over Luis Pinasco and I own the Hawk Boat IMPBA organization in the country with two thousand dollars was raised for this Company and use much of your infor over one hundred members. (That charity. The races proved interesting mation in our work. I have noticed that would also make it the largest model enough that we have been requested by much of your reader information is boat club in either IMPBA or NAMBAJd) other country clubs to hold similar supplied by R/C boaters from the west We race at Mission Lake, a city park, with contests at their facilities. Should any of ern part of the country. Florida and the the permission and support of the City of your readers want more detailed infor Southeast are very active areas, and I Lauderhill. Twice a year we hold state mation about setting up one of these thought I might provide some informa races in all the classes, hosting over two affairs, please have them contact me. My tion about our end of the world. hundred model boats. We also run address is 4401 NW 102 Terrace, Coral Our year-round balmy climate gives monthly races awarding trophies each Springs, FL 33065. us twelve months of racing, and anyone time and accumulating points (or annual I've included photographs of the not minding some traveling can parti awards. various products we manufacture. Of cipate almost every month. The winter This past year we added two new races special interest is our new "El Tiburon” winds often add another dimension, to our schedule. They were run at the (the shark). The picture is of a 3.5 wood other than just speed. Boca Raton Golf and Racquet Club. hull but we are in the process of devel Hull popularity seems equally distri Boca Raton, Florida and the Woodmont oping a fiberglass version. It will also be buted between outriggers and deep Country Club, Tamarac, Florida. At both available as a 7.5. Both sizes are out vees. There is a fair share of scale boats, affairs, the host donated over one standing performers as inboards as well and in the past two years, tunnels have thousand dollars for trophies, a fantastic as outboards. Somewhat of a hybrid * Ed Ryder, of Coral Springs, Florida, sends this photo of his Hawk. Hawk Boat Co. sells this Boat Caddy for outrigger and tunnel boats. Twin .90 powered, watch out! Downward slope of front end prevents engine flooding. 42 MODEL BUILDER Hotshot IV framework features eggcrate con Use Hot Stuff Super 'V to glue bottom in Clamps are useful to hold sponson sides in struction. Use building fixture for straightness. place. Wooden kits go together FAST! place while you work. Ctamps, pins, and masking tape are all used Tunnel wedges (light colored strips) are very Bow wing keeps the boat down on the water to keep top deck sheeting in place. useful to improve cornering. Simple mod! while running into the wind. Try it! design, it incorporates the stability and which once served as the location for the speed of a four point suspension out 1980 NAMBA Nationals, has increased rigger with the cornering and aero tremendously. We have a real problem dynamics of a tunnel hull. The modified with our floating, fine feathered friends. tunnel gives it quick planing ability One would think that the noise of our and it tiptoes across the water surface. engines would cause them to go to some The scale-like appearance has attracted other area of the lake. Such is not the a good deal of attention. Our main case. At one recent race, at least ten problem seems to be getting other ducks were struck and killed. boaters to race against it. It is much We have tried the usual things to get quicker than other tunnel hulls, and we them away from our racing activities. do not feel it should be classed as an Racers’ wives and children have gone to outrigger. More information about our the other side of the lake to feed the boats and our “ Boat Caddy" can be ducks and have attempted to get them obtained by writing me at the address off our race course. The problem still given above. remains. The boaters are getting dis Ed’s group and many other boat clubs couraged because they spend more are doing excellent public relations with time dodging ducks than racing. Even their benefit races. This type of event though a racer is disqualified when he provides a positive image for our model hits a duck that has been called to his ling activities. I encourage others to attention, this doesn’t help in eliminat share with us some of their promotional ing the problem. Hotshot IV business end: K&B 3.5 outboard; or charitable events. I would be the first to admit that ducks Prather mount; Octura X-442 prop. LORD LOVE A DUCK have more right to the lake than we do. I’m sure the Lord does love the ducks After all, it is their home. I’m asking for and all the creatures here on earth. ideas or suggestions from those who However, I know that most of the model might have similar problems and have boaters who race at my club’s local found a solution . . . other than a mass running site don’t share that same duck hunt the day prior to the race. How feeling. During the last few years, the duck population at our running site, Continued on page 72 The Woodmont Country Club hosted "Race Against Lukemia" in Tamarac, Florida recently, Hawk Boat's "E l Tiburon" combines best of and donated over 1,000 dollars for trophies, awards party, more! Over $2,000 to the charity! outrigger and tunnel design. Very, very FAST! OCTOBER 1983 43 5 «4- [ z K> in i L a m f Ϊ < > a < ML!JI — — i H i J l .— .— ·, OCTOBER 1983 To order full-size prints of these drawings, see ad on page 89. 4b Flightmasters West sparkplug and founder. Bill Warner launches P-nut scale model. behind Mather's 9 min. and 20 sec. time. Mark Levoe logged a 6:42 for third. Then Who says the girls don't enjoy this hobby? Shirley Baxter gets a helping hand from her other came Earl Hoffman with 5:23and Warren half. Dick Baxter. Model is the Feather Plane (No. 5) Ornithopter. Good beginner’s flapper. Williams flight of 5:18. As the Hand Launch models took to the air in the Peanut building, we joined the duration flyers for the Novice Penny- plane event in the second building. There was much pole steering and recovery from the ceiling heating ap paratus in this event. The room was a By KEN JOHNSON sweatbox! The winning times were: 7:50 flown by Earl Hoffman of Carpenteria, California, then Clarence Mather’s 6:43. TAFT INDOOR REPORT but the model was somewhat difficult to Third went to Cezar Banks (proxy flown Indoor flying at the Taft Free Flight trim. As the turns wound down, the by Mr. Bill Booth) and Fudo Takagi Champs was a "HOT” affair again tnis model settled as if dethermalizing. As it captured fourth with 4:53, while Warren year. The temperature was a definite turned out, the CG was too far aft (The Williams’ 5:18 was good enough for fifth factor, to say the least. At 6:30 p.m. the rear peg was later moved two stations place. gyms were already quite warm, and it forward), so the Cessna became my No. After seeing my model on test flight, got wrose as the evening wore on. 1 entry. the prop was noted to be the wrong Your editor was in the building where Meanwhile in the other gym, The Easy design for this room and did not war the Peanut Scale event was being flown. B event was being won by Clarence rant putting in an official flight. Half my Many new and exciting models were Mather of San Diego, California. Cezar time was spent retreiving my plane from seen being wound and being flown. Banks of the same city finished second the ceiling obstructions. Earl Hoffman’s Carlo Godel was again the contest with a flight of 7 min. 53 sec., just and Clarence Mather’s models were director. The Los Angeles area was well represented with indoor flyers such as: Dick Baxter, Chuck Conover, Barnaby Wainfsan, Tony Naccrato, Tom Com- paret, Von Whitlock, etc. The winners were: 1st, Ken Johnson, flying the previously mentioned 1911 Cessna; 2nd, Frank Godel and his Bede 4; 3rd, Dick Baxter, flying his LET (Flight- master’s president, Farrell Papic, also entered a LET). Tony Naccarato flew one of Lew Gitlow's new Peanut kit models. The 1909 Clerget was flown by yours truly. Waterman Gosling Peanut racer, beautiful. For the experienced flapper flyer only, these scale Leonardo da Vinci ornithopters were both Builder: Eric Erickson, Pasadena, Calif. built by the author. Double bellcrank model flies best (top). This was Leo's first airplane. 46 MODEL BUILDER Dick Ganslen flies his EZB at Bedford Boy's Ranch rec center. Bed- Chambermaid racer won Peanut for Von Whitlock at Los Angeles ford, Texas. Dick is world authority on pole vaulting! Randolph pic. Indoor Annual. Two-minute flights common with this one. most impressive. Perhaps a canard and then cruise nicely as the torque flights worked well with right turns, but pennyplane entry for next year would dissipates. Chances are the turn will open as the moisture-laden wings began to be my choice. and your little flying machine will head twist, the pattern was changed to left. In THE DANCER OF FLYING straight for the nearest wall. I remember this instance, the plane flew well to the WITH TORQUE an incident at the indoor portion of the left and won the meet. The extreme Most indoor duration models turn to ’68 Chicago Nats. My little Piper Vaga washin that developed in the Cessna's the left. For this reason, the left wing bond was flying great to the left on .035 left wing was beneficial to the flight. The panel is somewhat larger. This makes the rubber. The first flights were put in with wing was held up and could tolerate the model turn left as the larger left wing is only about half the turns on the motor. left torque turn. heavier. As the torque force on a dura My times were higher than those of the If you are flying a high-wing scale tion model is less (the rpm is much other entries. If I had continued with the model with struts, tnestrut length can be less than that on a scale model) the same turns on the last flights, the contest trimmed to build in a degree of washin aircraft can turn the same direction as would have been won. However, I in the inboard wing. Breathing on the the torque. The lesser pull of torque will opted to up the turns to the max. The wing while twisting it may help some not make the model spin in to the left. It results were disastrous. Each time more what. Usually this only works on a is still advisable to add about 1/8-inch of turns were added, the model would structure that is very light. The best way washin in the left wing. If you trim your spin in to the left. The result was that I to obtain the correct washin or washout duration entry to fly to the right, you lost the contest. If the model had been is to build it into the structure when it is may be in trouble. Sure, the airplane correctly trimed for a right turn pattern pinned to the board. To build in wash may fly beautifully in a right circle, but it . . . Oh well, more spilled milk! out on a Peanut scale wing, place a 1/8- will be opposite to the other models in A comment from the latest Taft con inch block near the tip under the trailing the air. The chances for a midair collison test mentioned above: the room was so edge. The benefit of washout in both are much greater when you are heading very hot and moist that my 1911 Cessna wingtips is that this controls tip stall. In directly toward the other models. changed its trim by warping. The first other words, the airplane can climb at a Now, let’s consider what happens to a scale or Peanut scale model when it turns to the right or left. The most _ D R A W WHEEL ATTACH SANDED WHEEL. normal way for this type of craft to turn is φ OUTLINES ON SHEET. ~ TO BLOCKS DM to the right. Rudder and/or thrust ( £ ) J l& C E M E R UNES. adjustment will cause the plane to turn right. If this doesn’t work, a small amount of clay on the right wing tip will bring it around. A left turning Peanut is dangerous because of the increased torque. The model may spin in on the power burst CUT OUTLAM/NA TED (2) ^ = = ^ < A J N G S T?A ΙΗ Γ WHEEL. BLACK AFTER E N D V IE W NOTE SHAPE. BUILD WHEEL ~T/A. & DRAW SPOKES ARE H U Chris Johnson's P-47 Peanut is covered with ^PO SITIO N. condenser paper, painted silver. Johnson pic. SPOKE POSITIONS-AS SHOWN OCTOBER 1983 47 higher angle of attack without stalling. in the days before Microlite. Ideally, the never got around to building one of INDOOR ROW REMEMBERED seaplane would jump right off the water these airplanes. Can you imagine flying duration and climb to the ceiling for a flight of CONSTRUCTING WHEELS models inside, and off water? Well, this about five minutes. The tiny, one-half by Many builders have shied away from was in fact, an indoor event. As late as one-inch pontoons were mounted on building early airplanes because of the 1964 I remember going to an indoor the ends of long balsa struts. If the model spoked wheels. Many times first place in meet in a suburb of Cleveland, Ohio, nosed over into the water (which hap a contest can be determined by the look and watching my buddy Ron Ganser set pened more often than not), it became of the wheels on the plane. a national record in ROW. A small tank saturated and was finished for the day. For many years, balsa wheels were (usually with only about 1/2-inch of Many times someone would step in the available in the rough-cut fashion. They water) was set on the floor in the area water or kick the tray across the floor, needed to be sanded and painted. deemed best for takeoff. The model was which made a big mess. Before this, hardwood sanded wheels set on top of this 18 in. x 12 in. body of Apparently, people lost interest in this were used by many modelers. The water. event, and it was later discontinued. It model airplanes of this age were rather The airplane was usually microfilm sure was unusual to see a mic covered heavy by my standards, partly because of covered. A stick/cabin fuselage was ship lifting off the water. Needless to say, the wheels. World War One wheels required, and the tiny, built-up floats more power was needed to fly a sea were covered with cellophane. This was plane than the other types. I’m sorry I Con tinued on page 78 Pfaltz Biplane Peanut scale model built by Eric Erickson was perfect WHOTAPROPELLER! Dick Baxter's LET monoplane flew very well from every angle! Ken Johnson photo. at the Flightmasters West Indoor Annual. Not hard to see why! 48 MODEL BUILDER Lloyd Wood built this beautiful 1913 Schneider Trophy winner, the F1D second place winner, Cezar Banks, carefully weighs his model Sopwith Tabloid. on the electronic scale during processing. Tony Bough is all smiles after a flight with NFFS Executive Director Hardy Broderson Father/daughter team, Dennis and Jeni Burr Stanton's all-foam "Bostonian." assists Ed Courtright, a local R/C flier. Jaecks prepare an SE5 built from MB plans. sented at the end of this article, so we will plaints, protests, or confusion with the order of the day. try here to give you some of the high largest turnout Westbaden has seen to The list of winners for these events is lights. date. Saturday was reserved for test and truly a who’s who of indoor modelling: The first half of the week was the NFFS hangar flying. Official events com Richmond, Chilton, Obarski, Van meet with Tony Italiano acting as CD, menced Sunday afternoon with Easy B Gorder, Markos, Banks, Skrjanc, Norell and ably assisted by Ffardy Broderson, and Paper Stick. These categories attract . . . just what one might expect, and a Charlie Sotich, and Gordon Wisniewski. beginners and experts alike, and at fact that points to a suggestion I first Tony and crew did a superb job; the Westbaden, the air above your head heard from Stan Stoy a few years back. contest was so well run that these gents looks like a summer evening around the Stan feels that instead of the current Jr., even had time to do some flying. Tony swamplands! A computer model of the Sr., Open classification of contestants in should run a course on how to prepare air picture would have predicted abun accordance to their age, we should have for, and then run a contest. No com dant mid-air collisions, and that was the Novice, Sportsman, Expert classfications Dave Erbach (Canada) flew one of the few re Stan Chilton (Kansas) processes paper and Butch Hadland (Gr. Britain) judged scale maining indoor cabin models in captivity. stick model; took 2nd with 24:46 flight. entries. Phil Cox's J-3 Cub, again. OCTOBER 1983 53 Bob Clemens (New York) entered this Luton Minor in the AMA scale Bob Siedentopf's fantastic Stinson Voyager placed 2nd in AMA event. scale. - JC- EZB rules say wood structure only. Richard Rich Doig (Mich.) releases his F1D indoor model. It came down 31 minutes later! Obarski complies fully with this model which uses fine balsa strips fo r "w ire s ." Ron Ganser from Pittsburgh has been about one hundred plans. If you’re as is done in R/C Pattern. This would playing with Ornithopters for several interested, drop him a SASE at 910 surely encourage some newcomers who years, and he pulled from a box his new Broadfields Drive, Louisville, KY 40207. are not necessarily minors. The way secret handiwork. This bird was a twin- He had with him two Foker D VII Cleve things are today, it takes many years motor, double-boom flapper with one land kits which I promptly snapped up, before a newcomer stands a chance to motor driving each wing. Unfortunately, along with plans for an XS-1 Cox Klemin see his name on a winner’s list. More in spite of the terrific workmanship, the seaplane which was a small biplane about rules later, now let me continue bird was a total failure. The wings were hydro meant to be carried aboard with the contest. beating alternately, and it just seemed to submarines. As Easy B and Paper Stick models beat the air with no results. Next time, Back again to the Paper Stick event.. . swarmed overhead, a friendly gent from Ron will stick to the way the breeze worthwhile noting was the advanced Lincoln, Nebraska, Walter Erbach, was flapping daddys from the old school do state-of-the-art of these models once systematically working with a small fleet it, rather than come up with new inven intended for beginning modelers. The of Ornithopters. These differed from tions. Walter Erbach’s new record thus winning models are now extremely most that have been built to date in that stands, and we congratulate him. delicate . . . possibly just as delicate as they had high aspect ratio wings and During the meet, a fine gent by the the microfilm ships. Stan Chilton, who is very long tail moments. Within a couple name of C.F. Shultz displayedan impres one of the more advanced fliers, was of hours, Walter managed to crack the sive collection of old-time plans, mostly using boron fibers to reinforce the existing record with a flight of 3:41. If rubber scale. These are full-scale copies motor stick, and he also was using the you have ever watched these non-living from old-time kits like Comet, joe Ott, highest aspect ratio wings. In the end, flappers, you know that this flight is an Megow, Stanzel, Peerless, Ideal, and first place in the event went to the most accomplishment that will be tough to many others. The price was most reason calm and cool flier, )im Richmond with match. able at $1.50 each. He has a price list with 26:57. Chilton placed second with 24:46, Richard Doig poses with the ultimate (?) AMA Dave Erbach (Canada) earned a second place John Voorhees (Ohio) is an R/C flier who is stick model: 300 sq. in., 1.3 gr., 26 in. prop. with this Bostonian model. just getting started in indoor. EZB models. 54 MODEL BUILDER Paul Me llrath entered this fantastic 1911 Caudron monoplane in the Here's another look at Rich Doig's AMA stick model. Prop pitch is NIMAS Peanut Grand Prix. a steep 45, and with its 2 6 -inch diam., it turns about 40 rpm. Former world champ, Jim Richmond, winds his F1D. Took 3rd in this NFFS meet. Californian Larry Cailliau took 1st place in FAI with this model. Times: 37:51, 35:32. and Obarski was right at his heels with 24:40. Think of these times . . . almost one-half hour with a paper covered, all wood prop, rubber powered model with no thermals to help! Easy B events also were won by the experts, and they had superb times: Ron Ganser (Penn.) flew this twin engine, bi One of several entries in the P-nut Grand Prix by Mike Arak. Piper Vagabond here. Markos, Van Corder, and Banks all plane flapper. Twin engine bird??? topped 18 minutes. As good as these Stan Chilton, the scientific flier from One flier, Bernie Boehm, had the meet times were, later in the week during the W ichita, Kansas, established a new won from the start. He has the best NIMAS record trials, they were ex record of 22 minutes and one second. catapult arm I have ever seen and it is ceeded by a substantial margin when This flight brought the house applause consistent. After launch, his first flight upon landing. hit a wall and was short, but from then Tuesday morning was reserved for on, every flight exceeded one minute. Indoor Hand Launched Gliders (IHLG). One hundred thirty-six seconds for two flights was his winning time; 116 seconds was his closest follower. Bob Larsh. I truly missed seeing Stan Stoy who has in the past several years shown up for the IHLG event with his sophisticated "Folder” . With this folding wing Glider, Stan shows how to compensate for the fact that he does not have the strongest arm in the U.S.A. Tuesday afternoon was the class event of the contest, or at least for me it was. Watching the slow, majestic flight of large microfilm models, is what indoor is all about. The first four rounds of the FAI event were scheduled from 1 p.m. to Jack McGillivray (Canada) prepares his 1st Jack Carter checks the heavy traffic above place winning Bostonian. prior to releasing his AMA stick model. Continued on page 62 OCTOBER 1983 55 "You gotta have enthusiasm .. . If you don't have anything to look forward to, you'll just stop." Smilin’ George Meyers of the Philadelphia SOTS club with his highly detailed 1924 • This month's lead-in line is a direct BOO-BOO DEPARTMENT Farman Avionette. Tom Schmitt photo. quote from master scale model builder, In our review of the beautiful Kool- Lou Proctor, explaining why he still hoven book from Holland, a gremlin fine ihree-view of the 1918 Heath bi eagerly anticipates each new project. struck: Although the heading was cor plane and Hoby Clay’s charming Peanut LONGEVITY RECORD? rect, Koolhoven’s name was misspelled model of same, may be interested in Our mention of Clarence Mather’s 24- no fewer that five times in the text .. . obtaining a copy of WW-I AERO for year-old-and-still-flying, rubber surely some sort of record. Apologies all April, 1983. Featured is an excellent powered Stormovik, in the July Model around. history of Edward Bayard Heath, the Builder, brought this response from Dan AND SPEAKING OF RECORDS man, as well as his early, lesser-known Lutz, of Kraft Systems: “ Bob Holland (of According to Dave Linstrum. writing products constructed from 1909 through 1/2A Hornet engine fame) has a rubber from the West Baden, Indiana indoor 1918. These laid the foundations for his model of the Skyfarer that Lew Mahieu meet, Walt Erbach established a new more famous parasols and racer of the and I used to chase on the playground at AMA indoor ornithopter record of four Golden Age era. The author of the piece Echo Park, the meeting place of the Los minutes and twenty-one seconds .. . is Owen Billman, himself a highly re Angeles Aeromodelers. This took place thats a lot of flapping! And what do garded builder of a full-size aircraft, the in the very early 1940s. He recently flew some of the indoor flyers really think of “ Little Pink Cloud". the same model at a gathering of old R/C? During this contest, one was In the same issue is comprehensive timers, and it flew great as I always overheard to say “ R/C Pattern is just information about the infamous Christ remembered it. aerial Pac-Man!" Ah well, to each his mas Bullet (including photos and a “ Now, one who might top that record o w n . . . three-view), Benoist aircraft (ditto) and is Ced Galloway. I hear he has models HEATH HISTORY Fokker triplanes. Of special relevance to that go back to the thirties. . . ” Readers who recall Walt Mooney’s Chip off the old block. Carl Linstrum eyeballs President "Teddy” Roosevelt prepares to go aloft in a Wright biplane piloted by Arch Hoxey. his EZP-30, a P-30 Class model. Photo was The year was 1910. Photo from Edward Petit collection, via Georges Chaulet, of France. taken by Carl's father, Dave Linstrum. 56 MODEL BUILDER Bill Winter, author of The W orld of Model Airplanes, admires Allan Elmo Yard Special, by Gerald Myers, is an imaginary vintage home- Schanzle's Jumbo Scale PT-19. Tom Schmitt photo. built. Power is furnished by a Brown Jr. CO2 engine. Myers photo. model builders should be the story of believe ammonia does). .. but they also 1983 Datsun 280-Z. Alphonse Penaud, by Nigel Mills, of seemed to accelerate mildew problems. ALL SCALE MEET England. Penaud experimented with Anyway, I have found that using house A forthcoming contest being con model helicopters, “ planophores” , hold amonia to wet balsa for forming ducted in Lexington, Kentucky by the twin-prop designs, kite balloons, and purposes does absolutely nothing that X-Cell Team, features both R/C and C/L envisioned a remarkably advanced plain water won’t do, given enough categories. We applaud the concept of amphibian, all of which are described. soaking time. And plain water never encouraging various facets of modeling, This issue is available for $4.00 from: curdles glue!” which in this case will include precision Leonard E. Opdycke, 15 Crescent Rd., PAPER PLANES PLANES PAY OFF scale, sport scale, giant scale, helicopter Poughkeepsie, NY 12601. Please tell him Almost everyone is aware of the scale, and C/L aerobatics, as well as a fly- Model Builder sent you. valuable awards available to the world’s just-for-fun option, and a swap-shop. WET WOOD WORDS top R/C pattern fliers in the annual Details are available from CD Lew Joe Wagner, of Wilmington, Penn Nevada contest . . . but a high-stakes McFarland, 3404 Keithshire Way, Lex sylvania, the designer of many models paper-plane competition? Yep. Accord ington KY 40503. How about including a such as the Dakota biplane, expresses his ing to Florence Bakken, who sent a Free Flight Scale class next year fellas opinion about softening balsa: "My clipping from the Eugene, Oregon . . . even if only Peanuts? experiments seem to show that ammonia Register-Guard, there was such a hap SOVIET SAUCER? has no ‘wood-softening’ effect at all. pening, offering a prize valued at According to an Associated Press What it does do is act as a detergent, sort $16,674. Here's how it worked: A fund report from Moscow, a Ukranian home- of. allowing water to penetrate the raising benefit was conducted in a large built aircraft designer has developed an wood fibers faster. Most modelers are auditorium on the University of Oregon aircraft with the configuration of a 16- unaware of how long it takes for balsa campus. For one dollar, entrants were foot diameter shallow dish, which can wood to become truly saturated with invited to fold and fly a paper glider also serve as an automobile. Addi water. The surface soaks up moisture from the balcony into the open sun-roof tionally, it may be adapted for use on quickly, and gives the impression that of an automobile located on the floor snow or water. As if that wasn’t enough, the wood is wet all the way through. below, a considerable distance away. the craft is also designed to descend like However, I found out, when pioneering Some 1,000 attempts were made, with a parachute in case of an aerial emer the wet die-cutting process at Veco, that 20 gliders actually entering the car. From gency! it takes at least an overnight soaking for this group, a drawing was held to deter DAVID DIELS DRAWINGS wood as thin as 3/32 of an inch to get mine the winner, student Abbas Sayah. Additional stick-n-tissue scale model really saturated. I’m talking about plain Sayah invested a total of 90 dollars in the plans have recently been released by water, of course. We did experiments attempt, and credited his paper airplane David Diels, P.O. Box 101, Woodville, with various “ wetting agents” to reduce experience as a youngster, living in Iran, soaking time, and they worked (as I for his accomplishment in winning the Continued on page 70 Here's a close-up of one of Emmanuel Fillon's rubber-powered tur Emmanuel Fillon holds up his Gossamer Albatross indoor model for bine planes. Misleading markings: "F-O LIE ". G. Chaulet photo. us to see. Note turbine plane on table. Photo by R. G. Moulton. OCTOBER 1983 57 Nat Comfort, of Richmond, Virginia, recently visited new Dayton Gib Robbins, of Anderson, Indiana, is a real live wire competitor in resident. Dale Mateer, and brought his 480 Shocer with a 3.5 . . . Harry Murphy's CIA. Scene is the September ’82 meet at Lawrence- took second at the CIA Fall Meet in Class B. H. Murphy photo. ville, Illinois. Satellite 450 being sheltered from wind. Fries photo. appealing free flight name. Stardusler (and most others with Star in the name): Way upthere,intheair,so high it "dusts the stars.” by Bob Stalik Floater: Conjures up images of flying forever, just drifting on the wind. Continental: Suave and sophisticated. Obviously made to fly in Europe. Time Machine: Such a great name that the clock seems to stop and watch. I wonder about other models. Those such things . . . sort of an Andy Rooney that have names that are flying puns. for free flighters. I have, however, never Those plays on words that burden understood how we can take ourselves otherwise perfectly good airplanes with too seriously, or how we can take our "cutesy” titles. Some examples: hobby too seriously, when we fly models Finnegan's Wake: A literary allusion. with such names as the Zeek, the Flying Who was Finnegan anyhow? Does he Burrito Brother, or the Geef. On the know he lives on as a rubber band other hand, there are many names powered airplane? which inspire the observer. I tend to find Driftwould: It's made of wood. It agreeable such names as these: drifts? If only it would? Sailplane: It should sail the skies Canned Heat: Is it a Jetex model, or a forever! box of sterno? Cumulus: There it is again, playing tag Simplex: Is it simple? Is it complex? THE NAMING OF NAMES with the clouds. Usually, it’s neither. I have long been intrigued with the Satellite: Like its namesake, it is CYSOB: Why should a model be names that we modelers use to christen circling the earth. tagged with "Go You Son Of A B...... ?" our designs. I think that our naming of Cloudhopper: Hops about on the Chicken Coupe: Have you ever been names may connote more about our clouds, a really nice image. around a real chicken coop? Does the selves than the models we fly. As I get Max Maker (and most others with model smell, look, or fly like a chicken? older, I tend to reminisce more about Max in the name): Such an obviously No Non Cents: Cutesy. A Pennyplane, Steve Riley sends this picture of Dan and Adam Tracy, of Maple Jerry Fowler, of Reynoldsburg, Ohio and COFFC, tries starting his Valley, Washington, as Adam is about to launch Wakefield model. Cox .09 powered, enlarged Maverick. Harry Murphy photo. 58 MODEL BUILDER hence the cents part. No non is a double nagative. Dixielander: Jazz music on the free flight field? Or does it mean someone from the deep South? Neither. It’s an English design. Mini Pearl: A country singer? A can of beer . . . small size? Why is it a gas model? Happy Hooker: Hooks thermals with a smile. Well, it's more descriptive than Streetwalker, another definition that’s synonymous. To close off this discussion, I guess the names that are the most descriptive and least inspirational are those that get to me the most. It’s really difficult to go bonkers over such as these: A.L.29: I pressume that this is Andres Lepp’s 29th Nordic. FIC Power: So...... ? Indoor '70 Champ: What happened to ’71, '72, or later? Twin Fin: Here’s a clue . . . it has two fins. Surprise? Modell No. 2 bis: Exciting? What does bis mean? Reminds me of an incom DARNED GOOD AIRFOIL B 8556b be very thermal sensitive. It should be a plete Bison. One of the Benedek sections intended good all-around competitive model North Korean Wake: Descriptive. for A-2 or Wakefield. Some people TOMY TIMER UPDATE Only one Wakefield in Korea? would overlook this one due to the Back in the August issue, I commented Folder IHLG: It’s a hand launch glider undercamber close to the trailing edge upon the new and smaller timers now for indoor. It folds. Now that is descrip . . . leading to some lack of control in the available in the toy shops. Recently, I tive! circle tow mode. With the trailing edge received a letter from Bill Gieskieng of So, now you know my biases. So, now as it is, the glide on this section should be Denver with some info as to how he uses you ask if this is the same guy who excellent, particularly in calmer condi this little wonder. Bill uses his as a timer named some of his ships as follows: tions. Build it using a sheeted trailing in HLG models. He says, "I am not mess Simple FAIman, C-Quell, and A- edge, or use cap strips to keep the ing with the governor pawl by adding Wonder? Yep, you are correct. I also did airoilf’s shape. weight, I am using a plastic disc with Good Times, N orthw ind. and Hot OCTOBER THREE-VIEW: notches cut out on the perimeter (see Lumber. I claim journalistic immunity. BIG MAX 88, BY LEE HINES sketch). These notches receive the However, if you have some favorite Now here is a name: 88-inch wing knotted end of a very fine monofilament names, drop them in an envelope and span: it has Max in the name; it ought to line (one pound test). The rubber band send them in. I think we are in need of be a real performer. As you know that power is not wrapped around the shaft, some new brainwork in the names Lee Hines has designed and flown it, you it is remote. The advantage of this department. also know that it is a performer. variation is that the fine line can be OCTOBER MYSTERY MODEL Several features of the model stand wrapped many times around the shaft Here’s one that would fit into the out when you study the plan. Among without increasing in size and fouling up good names category. I liked this model them: (1) the fin is an "all-flying" type, the running rate. Ten turns give about when it first appeared in American which means that the whole thing two minutes with a single strand of .06 Modeler magazine, and I still do. I got as moves and allegedly improves the effec Pirelli rubber. Also, multiple lines can be far as cutting out a full set of ribs for it. I tiveness of this surface; (2) the wing tips hooked onto the disc. Auto stab works loaned out my full-sized plans to a guy and stabilizer are constructed with well with the dethermalizer phase. The who was hot to build it, then he moved laminated balsa strips, which means that timer will run a bit faster with extra lines out of town. The original was meant to they should be very light, and should attached, but that is an advantage." fly with a Holland Hornet . . . the hot contribute to the overall thermal sen- Bill doesn’t mention it in the letter, setup of the time. Name the model and sitvity of the model; and (3) the boom is but he does remove the spring from the claim the prize. Send your correct name constructed from carbon fiber, which timer. The rubber band in the line acts as to Bill Northrop, be first in line, and you means that the tail end should be light as a power source to keep the timer mov get a free one year subscription to well. ing, while the pawl in tne timer controls Model Builder. (Don’t forget the In all, this ship looks like it is designed the rate at which it moves. This newer, model's correct name, (wrf) to fly well in calm air, but also set up to smaller timer is of a size and weight that DARNED GOOD AIRFO IL - B 8556b STATION 0 1.25 2.5 5 7.5 10 15 20 25 30 40 50 60 70 80 90 95 100 UPPER 1.4 3 4 5.3 6.3 7 8.25 9.15 9.75 10.2 10.5 10.2 9.35 8.2 6.4 4 2.5 0.6 LOWER 1.4 0.3 0.1 0 0.2 0.4 1 1.5 2.1 2.5 3.2 3.75 4 3.9 3.2 2 1.1 0 OCTOBER 1983 59 w 4 4 5 . VR 1 ·? ·? 1 8.5 ----- 1 BO . s p l a m 3 LT + + c f x .G .G x A L - 2 8 /3 5 1 10 -J V 3 ------B + ♦ 5.5 5.5 PROFILE (MAIN5) iws . sk Ply Ply .02 pro file SP.04*.l9-.04S l *.06 im s b t S ) .04 *.35 bass -*■ -*■ 5 .09 *(lo *(lo 45 S * .l .OB WE.B .OB , .OSB -*-Tip .OSB , 0 T ki -*-. PLV 3 +.I 9 .I ______* 04 SP+CF . 16 >4+10* RAKE RAKE >4+10* 16 J. F (.15 . 19^4.06X DBLR SP+C .04 B. SKIN + F.6 (45®)^ EPOX.V MODEL BUILDER .015 PLASTIC SHT-.^KNO T (NOT SCALE) OR WHATEVER RUBBER ACTUAL TIMER SIZE! TIE SIMPLE LOOP, HIT WITH HOT STUFF THEN DIP IN BAKING SODA, MAKES NICE BEAD. WITH SPRING REMOVED & DECK SHAVED Here's a close-up shot of Dan Tracy's Wakefield model which shows the Tomy timer installed on top of the wing center section. Device serves as both DT and VIT. His name, address, phone number, and "R ew ard!!" are just in case .... makes it possible to use it on indoor and outdoor rubber scale models to change rudder and stab settings. It is so small, that it will fit into the wing of nearly any outdoor hand launch glider without adding unnecessary weight, and it can be used to control many items from DT to autostab. Let me know what your uses are for this nifty little gadget. COMMENTS ON THE BUNT SYSTEM In July, I concluded a series on build ing and flying power models using VIT. Included was a short bit about bunt systems. Bill Gieskieng, who has ex plored the bunt system and flappers extensively, passed the following com ments along for the curious. "/ am a bit miffed at you referring to the ‘bunt’ as something new. Heck, I read about some English flier flyinga high thrust FAI ship using a bunt in '63 or ’64. I remem ber well because I had been working on such a technique and felt he’d stolen my thunder. “ I used a bunt on my first FAI ship in '64. It worked beautifully, sometimes, but the design was so weird that I could seldom get it to go in a straight line. I used it again in ’67 on my first flapper (flapper auto-stabs are made (or bunts). The bunt finally did it in. Koster used the bunt on his early flappers. Weird things kept happening. "I am now very reluctant to use the bunt. It is dangerous. It is not simply a question of whether or not the auto gimmicks do their job. I used to think it was a foul up on the gimmicks, but they were working. Something happens aerodynamically that we are not pre pared for. A shift in airflow on the wing can result in a new trim balance . . . "Look out for that badminton game on the other side of the gym." except the darn plane is upside down. OCTOBER 1983 61 During the flight, it is permissible for a INDOOR MODEL SUPPLY contestant to steer his mode! if a colli ENDURANCE RUBBER MODELS sion is imminent either with the building THE EASY B 3 /MS G lid e rs i r So*" ir sp*o ii9oi U 9 5 structure or with another model. This steering is accomplished by means of a "Matched Performance System” string which is pulled up by a helium for TOP PERFORMANCE filled balloon. This steering is a tricky K&B ENGINES task and very frequently ends up with an 16 Airplane - 4 Marine aborted flight or with a damaged model. K&B FUELS K&B GLOW PLUGS 7 Blends 4 ctioices The problem is how to accurately use a string to gently engage and move “ Matched Finish System” around a super delicate model that may for BEST APPEARANCE be 50 or 100 feet above, and although K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER 2 PARLOR THE SLOWPOKE So*« ie K&B SUPER POXY RESIN K&B SUPER POXY THINNER slow, is in constant motion. My obser COPTERS K&B SUPER POXY PRIMER K&B SUPER POXY PAINT so·* $3.95 vation is that 25 percent of all balloon K&B MIXING CUPS steers end up in disaster. One of the K&B MANUFACTURING most frequent problems during a steer is ί ρ*Λ"τ» $4.95 P lM ltc Prop 12152 Woodrufl Avenue the propeller wrapping itself up in the Downey. California 90241 steering line. THE "TIME MACHINE PENNY i models were probably the best flyers of One modeller from Southern Cali all sizes. The 575 was second best, the fornia, Larry Cailliau (an airline pilot) A/B kit job was third, with the T/2A a showed up with a clever improvement poor fourth. Both the. 09 and the 575 had on the usual steering rig. Larry had the I to be "shot down" as their glides were usual helium filled balloon, but instead fantastic. The .09 handled power better of the usual nylon line attached to the (Cub .09) and I used a hot K&B .29 or .32 balloon, Larry used a very light tubing in my 575. I did have some problems about 3/4-inch diameter and made of a I with the high power for which I think a material only a fraction of a mil thick. 13" MINIATURE SCALE AIRCRAFT KITS ea $6.95 little more rudder area would have This vinyl tube was inflated along with OUTSTANDING DETAILS, 3-VIEWS & HISTORY .045" Strip Wood, Light Sheet, Hardware & Prop, helped, but warping the right wing the balloon with helium and was 20or 30 Heat Transfers. Japanese Tissue panel to hold it up under power also feet in length followed thereafter with PLASTIC CYLINDERS in ALCO and HEATH ALCO SPORT 1929 ZIPPY SPORT A.R.V. helped. When they were flying right the usual nylon line. Steering with this WATERMAN RACER 1921 HEATH PARASOL 1928 I relatively rigid and large diameter tube AERONCA K 1937 Span 16" Length 9" they were something. INDOOR MODEL AIRPLANES by Lew Gitlow Harry is collecting such info and old proved clearly successful. There was no 48 pgs. 100 illust. (reprint) + FREE PLAN $3.95 plans for the Zeek. Apparently, there tendency for the prop to tangle; the PEANUT POWER by Hannan. 80 p g s ...... $8.95 visibility was excellent and the man INDOOR BALSA PACK $6.95 P NUT PACK $6.95 were several different versions. If you JAPANESE TISSUE 10 Ige 5 col. ro ll...... $5.95 I have some new or little-known Zeek euverability of the rig was a definite CONDENSER PAPER 2/$2.50 MICROLITE $3 25 memorabilia, send it to Harry Murphy at improvement over the traditional nylon RUBBER LUBE $1.50 BALSA CEMENT $1.50 line. Larry used several steers during his THRUST BEARINGS. Mini Dual or D ual...... $1.00 3824 Oakwood Blvd., Anderson. IN PIRELLI RUBBER .020 to .090" & 125 $2.35 46011. flying and in the end, it may have given 6:1 WINDER $3.95 16:1 MARK 1 $11 95 THE END him the edge to place him first during P-NUT CO-2 ENGINE $34.95 CHARGER $8.95 I this event. P-NUT PROP PACK 4 props, shafts, w.&p $2 95 In closing, let me suggest that you SCALE CYLINDERS 5 pack. 3/84 1 /2 "...... $1.00 consider joining up with the only all- The FAI event wasof particularinterest I M S. P-NUT PLANS ALL 5. 10 sheets $15.00 free-flight organization now serving as competitors are beginning to qualify ADD 10% POSTAGE—-MINIMUM POSTAGE $1.50 U.S. modelers. I am, of course, referring for placings in the team that will repre 1983 4 CATALOG 18 ILLUST. PGS. $1.50 I to the National Free Flight Society. Dues sent the U.S. in Japan at the World BOX C, GARBERVILLE, CA 95440 are $15.00 per year. Make checks pay Championship next year. A group of able to the NFFS and send to member U.S. modellers were recently invited to "In using the bunt, I would opt for a ship chairman, Don Hughes, 8383 Zan- Japan to check out the intended site for very conservative CG (say around 50 canaro Ct., Citrus Heights, CA 95610. the world event and reported on the percent or so). The stab would be Take it from your editor. Charter great Japanese hospitality and flying dropped early, and for a small distance, Member No. 1 of the National Free site. This news is creating great excite rather than shooting for a violent man Flight Society, it’s the organization to ment and competition to represent the euver at the last moment. There must be join. So, do il now! U.S.A. in the event. a very strong return force on the stab to Until next time . . . Thermals to all. · Wednesday was reserved for the scale glide position. More than most simple entries and speed flying. Scale was a well DT tensions give. Anyway, the bunt is represented event and judges Jim Jones, not as straightforward as it first appears." Indoor Week . . . Continued from page 55 Frank Scott, and Bob Wilder were kept Well, B ill.. . Excu-u-u-se me! Serious very busy judging the wide field. Both ly. I appreciate the information and tips 6 p.m. and AMA Stick models after Jones and Wilder are specialty suppliers from one of the most innovative experts 6 p.m. to the Indoor world. Jim Jones makes in the field. And, surprise, surprise, it For those of you who are not familiar very reasonably priced rubber strippers should be no surprise that someone like with indoor models, an FAI model is and balsa strippers while Bob Wilder Bill was one of the forerunners in experi supposed to weigh over one gram, and makes the most beautiful winders and menting with this latest development its span is limited to 25.6 inches. The torque meters known to mankind. . .. 1963, that’s a far piece ago! AMA Stick models are the largest with a The speed events were flown using THE ZEEK limitation of 300 square inches. The two helium filled balloons as pylons. It The CM Informer has been doing propellers used on these models have a was surprising how well many modellers some research on this Nostalgia model. diameter of about two-thirds the wing were able to adjust their ships to fly Editor Harry Murphy has solicited com span, and very steep pitches. A 25 inch around the pattern. It was also surprising ments from those folks who had experi diameter propeller and a 40-inch pitch how many of the scale models were ences building and flying this classic would not be uncommon for an AMA based upon Model Builder plans and ship. He quotes Russ Hansen’s experi Stick model. The propellers turn at sub- magazine articles in both Peanut and ences as to the best of the Zeeks. So, if Rossi speeds: 40 to 50 rpm would be a AMA scale. It was evident that the you are interested in building one for good speed, while a 60 rpm prop would models brought to Westbaden have the Nostalgia contests this year, here are be considered too fast to produce a been gradually improving. For instance, Russ' ratings: The277sq. in. .09powered winning flight. Ed Stoll’s Corben this time had a Model 62 MODEL BUILDER A Ford engine on the nose that looked so good you would have expected it to run. Not only did the model look great, it flew just as well. Not surprisingly, it came in first in AMA Scale. Phil Cox from Highland, Indiana, had a ]-3 which was a Fly With The show stopper based on Model Builder plan No. 782 C.P. It was detailed down to Σ LEADERS !!! the stabilizer trim slot covers and was beautifully built. With as mzny Cubs as we see, you would expect to just walk DU-BRO “WORLDS LEADER” past, but Phil’s Cub made you stop, IN MODEL PRODUCTS ... admire and dream. The Model Builder plan is based on official Piper Aircraft THE FINAL FILTER KWIK-GLO . f * i Hi JflUFF-L-AIRE II Corporation documentation giving you Clo Plug Connector No. 235 all the verification you would ever want. One piece brass During the evening of the 13th, a barrel snaps onto S6.95 plug for a workshop was convened to give the The ultimate in line filter Backpressure positive attendants an understanding of the with twice as much luel and noise level start various rule changes that are currently filtering capacity. 24 V?" can be varied by N o .162 St 75 adiustmg muffling spring in or out under discussion at the AMA Contest with tits any engine from 09 to 80 Board. This understanding will allow the TANK FILTER bat! lugs modelers to go back to their own district Combination weight Spring Steel AXLE SHAFTS representatives and voice their support, and titter designed No. 246 IV* X 1/6“ die. or disapproval, for these changes. For to tit all clunk No. 247 IV . X 5/32" dla. tanks Made ol sin those who may be interested, I will No. 246 2 " x 5/32" die. teted bronze to quickly summarize. The first is a rule No. 24* 2 " X 3/16" die. give ihe ultimate T) addition breaking down HLG into two in tillering na,c C major classes: one would be the tradi tional wooden HLG, and the other No. 161 $1.15 N o .147 S2.25 Pkg of 2 S2.00 would be the “ high technology” HLG KW IK-FILL FUEL PUMPS with exotic materials and gadgetry like COUPLET! FUElMC STSTEM \5yB C H iliLg folding wings. (I suppose we will no MCLUOES CAP FITTINGS F U fl TUMNG «NO » A T I» SMOOTH INFLATABLES longer see the battle of brain vs brawn or 8UkW'\HAND QPMfAMl.''«. AMI II" the Stoy Folder vs the strong arm flyer.) FIFA ON GALlON UUAR1 O · PIN· No. Diameter Per pair Another proposal calls for the crea Sl/I CANS 400R 4 " $1.75 tion of a series of stepping stone events No. 191 (Glo Fuel) 450R 4V ." S10.95 aimed at encouraging the starting $10.95 Features two piece bolt to 500R 5 " $13.15 youngsters. The consensus was that No. 250 (Gas/diesel) gether hubs and hub caps Re SSOR 5V ." SIS.35 S11.95 markably realistic looking. 600R 6" $17.55 though good, this idea should not be a part of the rule book. A series of changes to the Manhattan Cabin event such as stab limitations and S ocket allowance for film covering (but not Head No Ola Per pair u microfilm) were also discussed. Bolt 1.75T orR IV ." $3.00 One important discussion was held BALL WRENCH SET $3.25 <") (S) (T) 2 « i °R or S 2V ." S3.50 Fits 4 40 and 6 32 head suggesting the purge of old and obso SMOOTH SLICKS TREAD 2 50T.Rors 2 v ," S3.75 bolts Leads into any cap lete events. Richard Doig pointed out With aluminum finish wheel hubs 2.75T. Rors 2 V ." $4.00 screw head trom any anqle These low bounce, shock absorbing 3.00 T. R orS 3" S4.25 that it has been 14 years since an event 3 3/4 blades wheels feature a nylon, metalic 3.25 T or R 3V ." $4.50 was dropped from the Indoor reper No 132 S5.25 $4.75 toire. He feels that Cabin for instance is a limsh Pairs matched lor balance 3.50 τ or R 3V ." dinosaur with possibly no more than a BRASS PLATED DURA-COLLARS. Cat. No. 137 1/16" dozen flyers in the whole country NICKEL PLATED SOLDER LINKS Enough stock so that threads will not 138 3/32" strip and can be re worked tor many 139 1/8 " building for the event. other uses Sets include Allen Wrench 140 5/32" Another change proposal under the 141 3/16" Available in sets of 4 $.80 per set General Rules which was discussed Nickel plated links would close a loophole in the rubber will not corrode and powered events. Currently, a statement make an attractive and easy to solder Heavy duty is made which permits the use of “ com connector for servo or control horn Cat. No. 243 · 7/32" 244 1/4" Cat. No. 112 (2 with link guards) $.69 mercially available” balsa wood or $ 1 .0 0 -2 per set. plastic props. Under this wording, one modeler could buy from another a r No. Size QtV highly sophisticated microfilm struc w 8-32 NYLON FLAT & SPLIT WASHERS MS ( 10) tured propeller. The rule is not intended 309 2-56 X V» No. Size SOCKET HEAD 310 2-56 X V. ( 8 ) INSERT LOCK for Indoor, and thus it is recommended 321 No 2 FIAT CAP SCREWS 311 2-56 X V. (6) NUTS that this limitation be excluded from the 312 4-40 X I ( 10) 322 No. 2 SPLIT 313 4-40 X IV. (8) 323 No. 4 FLAT Indoor rules. a s s i f 314 4-40 X 1V» 324 No. 4 SPLIT Tuesday evening, the NFFS held a 315 6-32 X 1 do! v*; - · 325 No. 6 FLAT 316 6-32 X IV . (8) 326 No. 6 SPLIT banquet which was served at the North- N o.329 20 Per Pkg 317 6-32 X 1 Vi ( 6) 327 No 8 HAT S.50 wood Institute building as it has all the a s f i 318 8-32 X 1 ( 8 ) 10 Per Package 328 No. 8 SPLIT required facilities adjoining the flying $1.00 per package 319 8-32 X IV. ( 6 ) $1.00 field (Atrium). The guest speaker for the 320 8-32 X 1 V> (4) evening was Bob Champine. Bob is a DU-BRO PRODUCTS, INC. 480 Bonner Road Wauconda, Illinois 60084 retired NACA and NASA test pilot who has flown some of the most exotic aircraft in the development of modern aviation. Bob is also an avid modeler, OCTOBER 1983 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 63 3. Dick Obarski ...... 24:40 SERIES 5 0 ” Old Tim er R/C STRUCKS 1940 PAPER STICK JR./SR. 1. Paul Loučka ...... 19:04 1939 .. NEW RULER 2. M ike Van Gorder ...... 17:42 AIR TRAILS 3. Bob Skrjanc ...... 12:38 4 Partial Kit SPORTSTER e $39.95 HAND LAUNCHED GLIDER OPEN 0 $33.00 1. Bernie Boehm ...... 136 .29 to .36 1.90) Glow 2. Bob Larsh ...... 116 1938 70" S pan; 835 S q ■ in "C" or "D" Ignition 3. Dick Pivitt ...... 94.6 POWERHOUSE In addition to the Just Released New Ruler, the HAND LAUNCHED GLIDER SENIOR following partial kits are also available. 1. Bryan Fulmer ...... 114 a 9 $39.95 The 1936 FLYING QUAKER (Megow’s) 89" $21.50 HAND LAUNCHED GLIDER JUNIOR 50" SPAN 380 SQ. IN. 32-38 OZ.' Th e 1937 QUAKER FLASH (M cgow ’s) 67“ span $17.50 Th e 1937 "LONG” CABIN. 78" span $20.00 1. Paul Loučka ...... 88 3 CHANNEL. .09 TO 15 POWER The 1937 AIR CHIEF (Ideal's). 61" span $20.00 2. Aaron Markos ...... 85 “SERIES 50“ Kits are Full Kits witn Machine Cut 6 Partial kits arc Rib. Tip. and Former kits, i ney Sanded Parts. Formed Landing Gear, Partial R/C feature Machine Cut and Sanded Parts, Full Size 3. Dave Brown ...... 52 Hardware. Detailed Full Size Plans, and Printed Construction Plans, and building notes. They BOSTONIAN OPEN Assembly Instructions. 12 or 3 Ch R/C Gear Reqd.l meet SAM FF and R/C requirements. 1. Jack McGillivray ...... 566.4 COMING: 59" Quaker. 98" Flybaby. 98" Miss America COMING: 120" KG*2. 89” Miss Delcware; 96" Lanzo RB 2. Dave E rbach...... 489.5 *8” Cleveland Viking. 50" ClevcIamJ Cloudster At your Dealer or 3. Ken Groves ...... 477.6 add $2.00 per order,, MANHATTAN CABIN OPEN j ® 5 m b b w s s m m m , φ φ β η β μ π ? for UPS. Ca. Res ______P. O. B o x #9. Midway C ity. Ca 9?655 1. Walt VanG order...... 9:50 add 6% for Tax. 2. Chuck Markos ...... 8:56 3. Hardv Broderson...... 7:21 geared together at the rear to drive a PENNY PLANE OPEN ALL NEW ! single prop. Don was not a winner this 1. Dennis Jaeks ...... 16:00 time, coming in sixth, but he gets our 2. Gordy Wisniewski ...... 13:16 CUSTOM SCHNEURLE . congratulations for creativity and work 3. Walt Van G o rd e r...... 12:24 COX 009 ENGINES! manship. In Bostonian, the winner was PENNY PLANE SENIOR our Canadian friend Jack McGillivary, 1. M ike Van Gorder ...... 11:12 Racing & Stunt versions with special 2. Tom Norell ...... 10:39 hard chrome & honing technology. followed by Bob Clemens out of PENNY PLANE JUNIOR Also, Rochester, and Ken Groves, another 1. Jeni Jaeks ...... 12:36 Complete inventory of individual stock Canadian walking away with third. 2. Paul Loučka ...... 10:26 and custom parts for Cox Friday the 17th was the beginning of 3. Dave Brown ...... 8:35 T.D. 020, 049, 051 & 09 engines. the Peanut Grand Prix with flying start NOVICE PENNY PLANE OPEN Competition parts & accessories for ing at 7 p.m. and ending 24 hours later. 1. Chuck M a rk o s ...... 12:05 Combat, Free Fit., C/L & R/C Racing, Even with as well a populated entry as we 2. Jim C le m ...... 11:51 Speed, Stunt & Team Race. had on this occasion, there is no wayyou 3. Cezar Banks ...... 11:50 Exclusive distributor for the can complain about lack of time to take NOVICE PENNY PLANE SENIOR Nelson 15 engine & parts. 1. M ike Van Gorder ...... 11:17 your official flights. Eighty-four models 2. Bryan Fulmer ...... 6:40 For detailed catalog, send 50 cents to: were entered in the scale event with the NOVICE PENNY PLANE JUNIOR Kustom Kraftsmanship, Box 2699 monumental task of judging this event 1. Paul Loučka ...... 10:11 Laguna Hills, CA 92653 Telephone: (714) 830-5162 going to Butch Hadland, Bob Andrews, 2. Bryan Varney ...... 7:52 and Phil Cox. 3. Dave Brown ...... 6:22 UNLIMITED RUBBER SPEED mostly interested today in R/C gliders. After one week of full-time modelling activities, this reporter had toget back to 1. M ike Arak ...... 8.21 sec. He showed us many interesting slides 2. Frank Kieser ...... 10:78 sec. and gave us an account of many thrilling the West Coast, so he cannot report first 3. Chuck M a rk o s ...... 10:93 sec. flights. hand on how the flying went. It suffices PEANUT SPEED The organizers and managers of the to say that I spent several hours examin 1. Martin Varney ...... 9.87 sec. contest received a well deserved and ing the superb workmanship and detail 2. Butch Hadland ...... 10:98 sec. spontaneous round of applause for a of the numerous entries. R.O.G. CABIN OPEN meet to be remembered by all. Before closing, we should mention 1. Richard Doig ...... 25:12 that the contest next year is in jeopardy 2. Rob Ganser ...... 24:21 The very next morning commenced 3. Dan Belief ...... 23:38 the NIMAS Record Trials. The idea at this time. The building and surround ings which have served so well for the PEANUT SCALE OPEN during this Meet is to give each flyer an 1. Jack McGillivray (Volksplane).. 211.4 pts. opportunity to fly against the records past several years is up for sale. It is 2. Les Garber (Lacey) ...... 183 pts. existing at the time. The flyer who beats unknown whether the next owner or 3. Ken Groves (F ike )...... 182 the existing record by the widest margin tenant will be favorable to modelling PEANUT SCALE JR./SR. becomes the winner of the NIMAS activities. Some very dedicated model 1. Bryan Fulmer (Lacey) ...... 132 Meet. Larry Loučka became the NIMAS ling leaders are doing what they can to 2. Aaron Markos (Lacey) ...... 118 3. Dave Brown (Lacey) ...... 117 number one man by improving by 24 stay in touch and encourage an arrange ment favorable towards Indoor flying, AMA SCALE OPEN percent the then existing Open, Indoor 1. Ed Stoll (C orben)...... 176.5 Autogiro record with a time of 9:03. The but at this time any forecasts are pre mature. We will try to stay abreast of the 2. Bob Siedentopf second place winner was Mike Van (Russian Ambulance plane) ...... 172.5 Corder flying Novice Penny Plane and developments and keep you informed. 3. Tony Sutter (14 Bis)...... 171 by posting a time of 11:41 Mike im We hope we will be able to meet again at AMA SCALE JR./SR. proved the Senior PP record by almost Westbaden next year for the biggest and 1. Dave Brown (Lacey) ...... 143.5 12 percent. best meet yet. Cheers, Jose Tellez, P.O. FID (Time shown is sum of best two flights) Box 733, Laguna Beach, CA 92652. 1. Larry C ailliau...... 73:23 All in all, there were seven new 2. Cezar Banks ...... 69:26 records established during this event NATIONAL FREE FLIGHT SOCIETY CONTEST 3. Jim Richmond ...... 68:37 which shows the soundness of the idea, EASY B OPEN BOSTONIAN and the value of the meet. These records 1. Chuck Markos ...... 18:46 1. Jack McGillivray ...... 3.06 are shown at the end of this writeup. 2. Walt Van G o rd e r...... 18:20 2. Bob Clemens ...... 2.61 During the NIMAS Meet, we saw 3. Cezar Banks ...... 18:08 3. Ken Groves ...... 2.51 some very interesting Manhattan Cabin EASY B JR./SR. MANHATTAN CABIN and Bostonian flying. There were some 1. Mike Van Gorder ...... 16:23 1. Larry Loučka ...... 10:04 very creative models. Don Steeb from 2. Aaron Markos ...... 12:45 2. Chuck Markos ...... 8:57 3. Tom Norell ...... 12:43 3. Walt Van G o rd e r...... 8:37 Rochester, New York, showed up with PAPER STICK OPEN PENNY PLANE his model called “ Boston Gears” where 1. Jim Richmond ...... 26:57 1. Walt Vangorder ...... 12:15 he uses two motors in the fuselage 2. Stan Chilton ...... 24:46 NOVICE PENNY PLANE OPEN 64 MODEL BUILDER RÖGA/HANNO PRETTNER ---- DALOTEL 150 ---- FOR .35 TO .60 MOTORS See What You Get! SPAN 60” • Completely Prefabricated High Quality Fuselage and T°P D e c k SPATS • Obechi Veneer-Covered Foam Wings. n o t • Preshaped Tail and Rudder Unit. a v a i l a b l e • ABS Cowl, Clear Canopy, Hardware. An Easy-To-Handle 1/6 Scale Model THE QUICKIE BUILD OF ALL TIME CALIFORNIA RESIDENTS ADD 6% TAX Includes MANY OTHER SCALE KITS AVAILABLE Carriage Send Check. 1/7-Scale MOSQUITO, 95" span ...... $4 65 Cashier s Check (Add $30 for special shipping) or Money Order ONLY! 1/4 Scale SPITFIRE II, 102" span ...... $2 95 AVAILABLE FROM SPECIALS - SVENSON 1/4-scale STAMPE . . . $175 359 TROUSDALE DRIVE, SUITE A M AG IC 40, d e lu x e k i t ...... $1 20 CHULA VISTA. CALIFORNIA 92010 M A G IC 60, de luxe k i t ...... $160 POWERMAX Telephone (619) 691-0780 (Limited supply of MAGICS) SAE FOR PRICE LIST 1. Chuck Markos...... 11:55 Up 11-7 prop. As usual, the climb was 2. Wall Van C o rd e r...... 11:44 startling; the plane was up to 800 feet or 3. Jim C le m ...... 11:40 so in a minute. Larry's mouth was hang RUBBER STRIP NOVICE PENNY PLANE SENIOR ing open! He said, “ I had no idea Made in U.S.A. 1. M ike Van Gorder ...... 11:41 FAI RUBBER. electrics could do that!” I then handed SIZES: 1/4". 3/16". 1/8". 3/32". NOVICE PENNY PLANE JUNIOR the transmitter over to Larry and started 1. Aaron Markos ...... 12:24 him on his first R/C flight. 1/16", by 1 mm thick (.042"). 2. Paul Loučka...... 11:31 BOXED: 16 ounces of rubber per box. RECORD TRIALS OVERALL Larry had no problems at all and was INDEX COMPETITION flying it immediately. There are some PRICE: $12.50 per box, ppdin U.S.A. 1. Larry Loučka A u to g iro ...... 9:03 sec. very specific things I do to make flying (California residents add 6% sales tax) 1.248 Index — Open* easier for beginners if they are using old 2. Mike Van Gorder Nov P.P...... 11:41 sec. timers or gliders. The first rule is: no KSB TIMERS 1.118 Index — Senior· elevator whatever. Old timers and FUEL SHUTOFF 3. Aaron Markos Nov. P.P...... 12:24 sec. gliders, unless the turn is a steep one, 30 SEC. $11.95 6 M IN . DT 1.107 Index — lunior* don’t need elevator, and use of the 4. M ike Van Gorder E Z B ...... 16:27 sec. $1 1.95 1.067 Index — Senior* elevator only makes for one more thing SEND 504 FOR 1982/83 CA TALOG 5. Stan Chilton EZB...... 22:01 sec. for beginners to get mixed-up on. Con 1.06 Index — Open* fusion and panic usually lead to roller F, A. I .Model Supply I ^^Slooocwooooooocxjooooooooooooocionritv^wwv^ •Indicates a new record in this category. · coaster stalls, and a crash. PO BOX 3957 TORRANCE CA 90510 Larry had the rudder and elevator on the same stick, as is common practice. he had to do was line the plane up on Electric...... Continued from page 17 Rudder and elevator on separate sticks is final, and let it glide in. The Playboy does probably easier for the beginner as a beautiful job of landing itself, no Clinic a few months ago and asked the elevator cannot be fed in accidentally (I elevator needed. In fact, I would say that old “ which plane” question. He had know, the "old pros” will say that’s the Playboy knows more about flying seen me fly my Astro 020 Request a few terrible for many reasons, but let’s keep than most R/C pilots! If you leave it years back while he was flying his this for beginners). My advice to be alone, it will take care of itself. Wakefield, and he was very impressed ginners with rudder and elevator on the This is the perfect criterion for a by it. That Request must have something same stick is to nudge the stick with the beginner's plane, by the way. My feeling going for it as at least one other fellow thumb (or a finger) from the side of the about beginner’s planes is that they started flying electrics after he saw it stick. This keeps accidental elevator out. should be able to fly with no commands perform. (It is available as a kit from The worst way is to grasp the stick. This at all, and should be able to recover from Midway Models, and it makes a fine feeds in all kinds of wobble, and ele stalls and mild turns with no R/C com single-channel 020 electric.) Anyhow, vator, and jumping, and jerking around mands at all (i.e., “ Let go of the stick!” ). Larry mentioned that he was building the sky! The other piece of advice I give This is an incredibly difficult job for a the Leisure Playboy, and I encouraged is: keep the antenna pointed the same designer, most fail, and that is why so him strongly, as I had been impressed direction the plane is traveling. This many "trainers,” that are advertised as with its contest performance. eliminates the problem of orientation, trainers, require an instructor for several A few weeks later, Larry called to find even when the plane is coming toward hours. If you are a loner and want to out if I would give him flying lessons. I you. If you do this, the turns will be teach yourself, most trainers will crash like to teach flying, so it didn’t take any correct. The antenna may be over your on your first flight without an instructor. persuasion. We met early in the morning shoulder, and it may not look "cool” , If you are a loner, I recommend the at the University of Washington's big but it works. Again, if you are a beginner, Playboy to learn on, I think you will have soccer field. the "old pros” will say this is awkward, an excellent chance of learning R/C Larry had done an immaculate job of but. it is surefire, and there is no memory without help. building the Playboy. The plane was work involved (I never did get that bit Do follow the advice I gave earlier covered in Micafilm, which looks just about lifting the wing u p ...), it’s all about elevator and antenna direction, like silkspan. and everything checked automatic. and you will be able to fly the Playboy. out perfectly. Larry installed the Astro 05 So, with this advice, Leonard flew all of On the second flight, Leonard was doing cobalt motor with its gear unit, and a Rev the first flight, including the landing! All ROG takeoffs. On the third flight, hand OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ‘ EM MODEL BUILDER SENT YOU! 65 time under power to time in glide seems λ 1 to be very close to six or seven to one in W IL L IA M S T CC favor of the glide. This makes it easy to BROTHERS A L L l j j UKI l J get those 20 to 30 minute flights with sub-C ceils. Leonard carries his motorcycle charg >. iPILOTS ing batteries in a wooden box with a STANOARO · SPORTSMAN ^ Ě l l RACING · MILITARY · | * jV. carrying strap, separate from the rest of his equipment. This is an excellent idea, as the motorcycle batteries will always WHEELS ► i f f spill some acid, and wood is ideal for VINTAGE · SMOOTH CONTOUR BALLOON · GOLDEN AGE absorbing the acid, neutralizing it, and keeping things out of harm’s way. I used to carry motorcycle batteries in a field é S tifr . < PRATTENGINES & WHITNET · WRIGHT · IE RHONE box with the rest of my equipment, but after a few acid spills . . . never again! Plastic boxes will hold spills, but will not absorb them, so the acid is just waiting to PRATT^I? A & WHITNEY RTS · IE RHONE ► I do damage. I agree with Leonard, wood WRIGHT · GNOME is best. Anyhow, try the Leisure Playboy, you’ll like it! Another item now carried by Leisure - GUNS 1 Electronics is a partial kit (ribs, formers, plans) of the Ultra, a high-performance glider featured in January 1983 MB. Price LEWIS · VICKERS · SPANDAU · PARABEllUM of the partial kit is $16. Last month I talked about charging, SEND $1 FOR FULLY ILLUSTRATED CATALOG ’/ ’ III I. DEPT. MB 181 PAWNEE ST. SAN MARCOS. CALIFORNIA 92069 _____ * * ° * wc and as a result of those tests, I started wondering how much comes out com launch takeoffs. At that point, I gradu and he did have some problems with pared to what goes in. I ran discharge ated him! Leonard was all smiles, he gears on the gear drives. The Astro tests using the Leisure pattern wind really couldn't believe how easy it was, cobalt motor has an incredible rate of motor turning a 6-4 prop, static. Most and how well the Playboy performed. climb, but the Leisure pattern wind gives runs on a Sanyo sub-C. six-cell pack The story goes further. . . A few weeks the maximum flight time. With the started at 12.600 rpm or so and were later, we got together for the photo pattern wind, Leonard routinely gets 20 stopped at 10,000 rpm after six minutes. session that these photos are from, and to 30 minutes of flight time with no The current had to run through an Leonard’s boy, Ramsey, was flying the thermal assists. This consists of about ammeter so that I could keep track of plane! Ramsey is 10 years old, and he was four climbs to 800 feet or so, then glides the total amperes that went through. flying with all the aplomb of an expert! It with the motor off. The best battery pack The ammeter dropped the rpms about was a classic case of "Show One. Do one. has been the seven-cell Sanyo pack 500, so the motor was capable of a true Teach one.” Leonard had taught Ramsey (sub-C). An 11-7.5 Top Flite prop gives rpm of 10,500 or so at the end of the run. to fly, and Ramsey was having a blast. the best climb with the Leisure pattern I wrote down the amperes at the end of Ramsey does the landings too, and is wind motor, Astro belt drive, and seven each minute. A typical run was like this: now working on takeoffs. cells. 14,13,13,13,12,12,9, for a total of 75 Again, I cannot think of a higher The plans show a hatch on the bottom ampere-minutes. Most packs are rated recommendation for the Leisure Play for the battery installation, Leonard uses at 1.2 ah (which equals 72 ampere- boy as a beginner’s plane. Add this to the a side hatch which is very neat and easy minutes), so it looks like the Sanyos are fact that it is a highly competitive contest to use. The batteries are rubberbanded capable of more time than 100 percent plane, and you have a combination that to a plywood plate that slides in and out of the manufacturer’s rating! This is is impossible to beat! on rails which form a slot. I like this excellent, as the cells are cranking out a Leonard is a machinist by trade, and is arrangement and recommend it. The 10-times capacity rate, which I’m sure a proficient free flight modeler, so he plans do not show motor cooling, Leon Sanyo didn’t ever plan on! However, the had no problems in building the plane. ard uses a removable top hatch with a cells also accept a lot more than 72 am He did make some modifications that corner of a plastic bottle as an air scoop. too, this particular run I put in 81 am are well worth describing. First, though, There are a couple of holes in the before the cells peaked, 13 percent I should say that the kit is very well done, bottom of the nose planking to serve as more than the manufacturer’s rating! and all the pieces are cleanly cut, no die air exits; this works quite well. Leonard Sanyo has been very conservative about smashing! The instructionsareall written bent in a shock absorbing loop in the the rating of their cells, they really are however, and an inexperienced builder landing gear legs so he wouldn’t have to capable of more than advertised per will find it will take slow and careful keep straightening out the legs, this formance. Anyhow, 81 am in, 75 am out, work, as this is a "stick and tissue” type solved the problem of bent legs com comes to 93 percent efficiency, which is design. That is the one criticism I have, pletely. He also sheeted farther back on much more than I would have expected. the plane is fairly complicated to build, the sides than the kit does (this is not It goes to show that NiCds can be very and with no drawings or photos to guide clear on the plans), to just past the rear of good indeed. you, the first-time builder will find it a the pylon, so it is easier to mount radio I have also run some tests with a new real challenge. If you are a new buiider, gear. GE pack which show the same numbers be prepared to take your time and to put The radio is small, and consists of an (83 am in, 72 am out) so the Sanyos are in lots of it, this is not a one-week-to- Airtronics receiver, S22 World Engines not alone. I guess the next question is: build model. Have patience, keep at it, servos, and a 250 mah battery pack. All- could you save time in charging by and you will be rewarded with a high up weight is 46 ounces, with a span of putting in just the maximum efficiency performance plane. 67-1/2 inches, and 582 square inches of number of ampere-minutes? Perhaps Anyhow, Leonard has used the Astro wing area. The planssay the usual weight the packs would have given almost 100 cobalt 05 with gear drive, the Leisure is between 28 to 38 ounces, but I think percent? Was that extra six ampere- pattern wind with gear drive, and the weights in the 40-ounce range will be minutes just a waste of time? I may take a Leisure pattern wind with the Astro belt the more usual ones. At any rate, the look at these questions too, as it did take drive. Leonard prefers the last combina glide is excellent, slow, floating, with a 18 minutes to get 81 am in, and I pul 75 tion best, the belt drive is very smooth, very low rate of sink. The usual rule for am in at 16 minutes. The more you try, 66 MODEL BUILDER the more you learn! 1 Last, and most likely least, I've dreamed up a theory that explains CANNON MINI R /C & SPORT ENGINES R/C SYSTEMS things like memory, and why fast U/CONTROL ENGINES PROVIDE HIGH RPM'S FOR TOP charged batteries show more capacity. PERFORMANCE; THROTTLED R/C ENGINES COMBINE DEPENDABLE IDLE WITH SMOOTH So, here's where I make my claim to TRANSITION TO CONSISTENT HIGH SPEEDS. ALL START EASILY; MUFFLERS ARE STD. fame! First, rechargeable batteries have to have solid material in their plates at all .03 U/C 03 R/c __ .061 R/C Jfc times. Throw-away batteries do not, their plates dissolve, and once dissolved, like Humpty Dumpty, they cannot be put together again (i.e., charged). In a NiCd cell, the solids are cadmium and cadmium hydroxide for one plate, $35.95 nickel oxide and nickel hydroxide for $29.95 00 RPM the other plate. The more finely divided 16,000 - 20,000 the material, the better the reactions go that charge or discharge the cell, as a .061 R /C -C fine powder has a lot more surface area than large blocks. The reactions are on $38.95 the surface. Reactions that go fast 061 U /C produce fine powder (actually, micro FOR CARS & BOATS crystals), reactions that go slowly pro $32.95 duce large particles (large crystals). This 14, 000- 18,000 RPM '■ '.\ \ X iÖ tN^ICLUDED. 4500 - 21,000 RPM just may be the cause of “ memory” , and CASH DISCOUNT PR I CCS SHOWN. VISA or MASTERCARD 5 t , higher. In Calif, add Sales Tax. Shipping $3.00. why batteries that are fast charged and VISA 201 deposit req'd on COD's. Brochure 75c in U.S., fast discharged can yield more power. $2.00 Foreign. Std. Dealer and Distributor Discounts. Everything is happening so fast that the I 13400-26 Saticoy Street North Hollywood. Colif 91605 (2) 3)7 64-1488 J plate material is in a very fine powder form, and so has the surface area for May ’83). However, this time I allowed NO TIME TO BUILD? efficient current delivery. A cell that is myself to get so engrossed in what I was TRY OUR OLD TIME" F/F-R/C AIRCRAFT slow charged and slow discharged, on doing that I lost track of the time and FULLY ASSEMBLED COMPONENTS the other hand, will have time to build never even thought to check or clean n up the particle size in the plates, the the new resident plug, an Autolite 85. surface area goes down, and the cell It was plain old dumb luck that the becomes less efficient. It also will take fouled plug didn’t start to mess things up longer to break up the larger particles, till after takeoff. I cleaned the offensive R/C thus "memory” problems. plug, got rid of the nasty carbon build REPLICA Now, all I have to do is find someone up . . . and once again had a depend OF willing to do all the work to check this able airborne system. I figure that if a 1938 F/F out! Till next time, remember, electrics dirty plug will affect my Royal, it’ll do its IDEAL FOR BEGINNERS & EXPERTS 72* Span — 29 lo 40 Engine Sue (Less Wheels) are the most fun! · dirty deed on virtually any other receiver 2-3 Channel Operation, or F/F . . . in spades. Make that frequent plug Quality Built Components of Balsa. Spruce & Ply Formed Spring Steel Landing Gear/Tail Wheel Assembly check a very important part of your FULLY FRAMED - UNCOVERED $14995 Add $8 00 ShecMntfMwKftnq BIG Birds.... Continued from page 37 preventative maintenance schedule and NEW! NOW IN KIT FORM WITH FUSELAGE SIDES PRE BUILT $89.95 enjoy top engine performance and Thu it a tu» Ait A l component! o'»ng AU A/C SAIPPM U P S N ot· UTAN R£StD£NTS ceivers have sort of lulled me into a false afford to have a less safe and unpre BEEHIVE R/C MODEL AIRCRAFT CO AOO 4% SALES TAX BOX 744. LAYTON. UT »4041 ΟΦβΜι to p u .·«» tontmJ sense of security. I’ve enjoyed so much dictable flying machine? absolutely glitch-free flying using both MAG-AERO K-21 REVISITED the Mag on. If you're hankerin' to get my two-converted-to-four-channel and Here’s an update to the Mag-Aero bit more out of your K-21, this head might my six-channel Royals that I was begin presented in the May “ BIG Birds.” Bruce be a wise choice (unless your engine is ning to think I was untouchable. . .that I Edwards won’t admit it, but he really hardly run. You should also get new could fly through anything as long as I likes to tinker (he would have been in rings and gaskets along with the new had those loyal Royals aboard. hog-heaven messing around with head.). According to Bruce, the head Of course I was headed for trouble, Galloping Ghost back in the mid-fifties), part number is 101011-0096 0, and he but lucked out by not finding out the and he has found yet another way to obtained his from Whidbey City Saw & hard way that even Royal electronics better the 21cc Mag-Aero. Cycle, Rt. 1. Box 664, Clinton, Whidbey have their limitations. Because I've been “ I couldn’t resist getting one of those City, WA 98236, (206) 321-6258 . . . testing a variety of props and oils (and high performance heads pictured in although I’m sure that Roush Manufac some “ hand massaging” I felt obliged to some recent ads. Switching to this new turing and probably Echo Chain Saw try), one of my engines built up a lot of head worked even better than I hoped it Dealers could get this head for you, also. time, and the other day the inevitable would; although I’ve never considered Whether you want to spring for the $45 finally happened . . . my whole world the forward-facing plug to be a real will depend on how much you really went to pieces during some taxi and problem, I do like the way the plug need or want the extra power; Bruce range tests when my rock steady, four- installs vertically in this new head . . . feels it was money well spent, especially channel Royal all of a sudden wasn't so and I’m tickled pink about the K-21’s since he’d picked up his engine for a rock steady. In fact it turned just plain increase in performance. song. flakey on me, and after hysterically “ On the ground, I tached an increase MORE ON FILTERS checking everything else I could think of of 700-800 rpm using the same 16-8 . . . Like most others doing a monthly and coming up with nothing, I checked and in the air, the new head really column. I’m continually amazed as to the plug as a “ last resort” .. . and found I proved its worth. My Aero-Fly had more what generates the most mail (and should have looked there in the first ‘snap’ and vertical performance, which phone calls). The latest deluge came place. I usually keep close tabs on before hadn’t been bad, but it is now from what I thought was an almost in running time and clean my plugs every most impressive.” nocuous statement about on-board two to two and a half hours using a Bruce isn’t exaggerating! This new fuel filters (also May ’83 “ Big Birds” ). It K-Mart Spark Plug Cleaner (BIG Birds. high performance head has really turned was a mixed bag’s worth of communi- OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL‘EM MODEL BUILDER SENT YOU! 67 A number of people have asked about using a large header tank to feed a much Bring Ihe MonoKote ' classroom smaller engine tank ... so Monti’s right to your own TV...with Top Flite's, comments should be an incentive to go one hour MonoKote I Video Tape. ahead. However you go about filtering From simple flat surfaces to fillets your petrol, don’t feed it to your engine and hinges. Top Flite's video tape till it has been cleaned; dirty fuel will not teaches you basic MonoKoting skills. only shorten your engine’s lifespan, but Learn right in your own home... per it’ll probably cause a crash on takeoff, or fect for club showings, too. any other time a sudden and full de η • Purchase for only $39.95. • If rented, return within 30 days for mand is put on your engine. $20.00 refund. A NEW UNOFFICIAL RECORD • VHS or BETA format available. Every year a new distance-in-a- s e s s i o n • Each order receives a valuable straight-line record seems to be set. First coupon worth up to $75.60 off it was over 100 miles; then over 200 list price of 12 six foot rolls of miles; last year it was a Mr. Mulligan MonoKote. going 338 miles; and now Roland Top Flite.. .helping you every step Spicer’s beautiful Bellanca Skyrocket of the way. took eight hours and thirteen minutes to Send check or money order for fly an almost unbelievable 454 miles MONOKOTE I $39.95 with name, full address and non-stop. VIDEO choice of VHS or BETA format to: Friend Spicer’s creation weighed fifty pounds dry, and took off with a payload TAPE of 42.25 pounds of fu e l.. . giving him an TOP FLITE MODELS, INC. initial wing loading of 111 ounces per MonoKote I Video Tape Offer square foot. Wow! Yet Roland (who by 1901 N Narragansett Ave the way is only 77) insists that accurately Chicago. IL 60639 and painstakingly plotting the true Bellanca airfoil gave him an edge. “ We were terribly efficient, and even with that takeoff gross weight, were airborne in less than seven seconds,” he said. Eliminates GLITCH problems associated with long servo leads. At that weight and wing loading, seven seconds really isn’t much time, • Eliminates need for voltage robbing chokes and other devices with although we’re talking about hundreds leads over 15” long of feet; I wouldn’t have been surprised • Modern CMOS IC technology to hear him say it took seventeen • Uses less than 0.5 milliamps at 4.8 volts seconds to get off the runway. Can you STOP • Power lines are capacitor filtered believe that, a 3.15 Kawasaki, turning a Available in 4 versions with connector installed: 23-20 prop, managed to get this bird 95- Single Channel, single servo drive (Single) GS-1 airborne without developing a severe 95- Single Channel, two servo drive (Wye) GS-1 Y hernia? By the way, she spanned eleven $14 95 - Two Channel, two independent servo drive (Twin) GS-2 feet and six inches, with an overall area EMS S17.95 - Two Channel, two servos per channel drive (Twin Wye) GS-2Y of 1909 square inches, and took off and • Overall lead length is approximately 6" to 8" landed back at the St. Augustine Airport • Modeler must furnish own longer extensions as required in St. Augustine, Florida. Although Spicer designed and built this magni Specify Radio S1.00 Shipping and Handling on Pre-Paid orders, add 6% for California residents. Mastercharge and Visa. ficent flying machine, the piloting duties 6175 PALO ALTO DR., ANAHEIM, CALIF. 92807 (714) 637-2161 during the record-setting flight were handled by Rhett Radford and Dean Mclnnis. Roland called me thesameday cations, some for and some against my muffler from entering the on-board of the flight to let me know how well double-filtering fuel from the can. and tank. Later, when I did some RPV work everything had gone (he was riding one not using an onboard filter. Monti for Cal Poly State University’s Aero helluva high after being up for over 24 Farrell, a San Luis Obispo, California Engineering Department, we did the hours), and that I’d helped him in resident, sent a dispatch that did contain same kind of thing very successfully. achieving that 454 miles; he’d used the some interesting information. “ Our camera bird was good for three same prop and aileron control hook-up "Reference: your comments on filters to four-hour orbits to get just the right I’d recommended. in the 24 ounce report. I agree with you set of pictures, and as the RPV used large If you’ve got the yearning to build a about on-board filters . . . with one engines (up to 30 hp), it burned between great BIG Bird, drop a line to Roland exception. For years, the sport flyer with two to three gallons per flight. Even if Spicer, 107 Menedez Road, St. Augus glow engines has pressurized his fuel you try crankcase pressure through a tine, FL 32084. and ask for a set of plans tank with exhaust pressure. This slight check valve, I still recommend a filteron for the Bellanca Skyrocket: they are positive pressure is tapped from the the line to the tank to keep “ stuff” out of available. muffler or exhaust manifolds and is the tank and permit a non-filtered fuel Please keep in mind that even though conducted to the tank through the system. I had some interesting times HIGH wing loadings are gonna be normal vent connection. flying a few of the 130-pound RPVs on associated with record-breaking aircraft “ In my early BIG Bird days, we flew research projects at Cal Poly. like the Skyrocket, 111 ounces per some camera missions with a ten-footer " I’m now involved in developing a square foot is not the kind of loading for using a gallon header tank feeding a four new RPV approach to some civilian our everyday type of BIG Bird. Thirty five or six ounce engine service tank . .. and problems with success. Can’t discuss the to forty ounces per square foot have pressurized by exhaust pressure to the particulars right now, but it’s a fun job proven to be really good ball-park header tank. We found that the Profi .76 with my own company.” figures, and IMAA’s recommended max ran great on clean fuel by double- Sound like you're having a great time, of forty eight ounces per square foot is filtering the ground fuel supply and Monti. Whenever anyone can use the based on lots of experience and sound filtering the exhaust pressure line to words “ fun” and “ job” together, he’s judgement. A lead sled won’t do any keep clinkers and carbon from the got to evoke a little envy from most of us. thing but get you into a heap of trouble 68 MODEL BUILDER . . . so keep those birds l-i-g-h-t. TIP OF THE MONTH “ Time flies like the wind, but fruit flies like bananas.” WHERE TO WRITE N4 ° nWe w Al Alman, 60518th Street, East, Box 95, SIZES! Spanaway, WA 98387. Keep sending Competition-Proven those written goodies and pix in, gang. 1 The name of this game is . . . sharing. FLYING SAFETY IS NO ACCIDENT. · OCTURA Aerobatic . . . . Continued from page 15 X-SERIES than the conventional gas version, not enough to adversely effect the flight characteristics. PROPELLERS The next morning found us at nearby Angel Stadium for the test flights. With X-tra Speed!...X-tra Performance! the Chipmunk all charged up and pic tures taken, I had no choice but to point the Chipmunk into the wind and push FOR PERFORMANCE YOU’ LL BE PROUD O F ... These, as all Octura Propellers, meet the most exact the throttle stick forward. ing requirements. Available now in beryllium copper. The Chipmunk shot off like a rocket. Fit 3/16" shaft. Check your local progressive hobby With tail up, and acceptable airspeed at shop. hand, I eased her off the runway and let X440/3 RECOMMENDED APPLICATIONS her climb out. The Chipmunk required 3.5 OUTRIGGER X445 X447 no trim. I immediately checked out the 7.5 OUTBOARD control responses. I soon realized that .75 DEEP VEE X450 X455 this Chipmunk flew just like Da Big One: 7.5 OUTRIGGER X455/3 65 SCALE HYDRO loops and rolls are good, snaps are even X457 65 DEEP VEE better. After three minutes of terroriz X460 ing southern Anaheim, I put the Chip X462 65 OUTRIGGER a «1 00 for •X467 go DEEP VEE munk on a standard downwind pattern, 3Sj,*.nd P«« turned the motor off, turned the Chip 7 3 " indicates 3 Bladed Propeller munk back into the wind, and accom ca,a list 1»- plished a picture-perfect, wheels-on ” SINCE 1954” landing and roll-out in front of me. I OCTURA MODELS. INC• 7351 N. Hamlin Ave · Skokie, IL 60076 was amazed, true history in the making. The flight was a little under four minutes, and I still had plenty of power simple Mr. Power Flyer. There are to taxi back. Subsequent flights showed dozens of .25-.40 size stand-off scale and the Chipmunk was still a little over sport ships that are about the same size propped. Starting to work on a Rev-Up as the Chipmunk. Most are wood con 9-6. I found the best size to be 8-5/8 struction that could take an additional diameter. The cut-down propeller lets pound of weight out of the airframe. the Astro 40 spin 14.000 rpm on the Taking weight out is the same as putting ground. Flight times are now up to five performance in. I am using a simple minutes with the current draw down to relay switch to control the motor. There 15 amps. The Chipmunk is fully aero are several new transistorized speed batic, including my poorly executed controls available that could do two lamcevaks, "Executed is a good descrip things for you: first, they achieve a Monocoupe 90A tion.” Estimates put the Chipmunk in perfectly proportional throttle control; the 60 to 70 mph bracket. When I second, they pulse the electricity to the % scale demonstrated the Chipmunk at Mile motor allowing for up to a 20 percent Send $2.00 lor Catalog Square, there were several other sport increase in duration. An additional 20 Ikon N'WST planes in the air. No one knew the percent is a minute more air time. Dept. M B. Chipmunk was electric until they saw The fact is, gentlemen, that many of P.O. Box 566 Auburn. WA 98002 me taxi it back, turning the motor on and use are in danger of losing our flying off to achieve taxi. As a matter of fact, fields due to noise. If you convert to ______(206) 941-8248______that day the Chipmunk was the fastest electric power you will benefit in more quires is an occasional dusting off plane in the air. ways than you realize at this point. Sure because of the runway dirt that the prop I have included a diagram of the there’s no noise, but what about fuel. pattern we use at the Astro Flight How much money are you pouring kicks up on take-off. Combine all the Champs. Note that it is a fly through through that ,40's carburetor? Think above benefits with the instant on/off pattern, adapted from the AMA rule about it; my NiCds in the Chipmunk will capabilities of an electric m odel. . . and book. The Chipmunk completes the last an average of two thousand charge/ doesn’t it make sense to fly electric? Astro pattern in two minutes. I am discharge cycles. At an average of 10 I’ve read several articles on electric confident that the Chipmunk, or a flights a week, I'll still be flying the cells that end up saying, “ Electric power is on model of this size, will win the 1984 Astro in my Chipmunk in 1987. How much contest. While the 05s have ruled the alcohol and oil are you going to go the verge of happening, an idea whose electric aerobatic competitions of the through in four years? time has come.” Gentlemen. I say there past, the larger model is so much more Unless I lose my Chipmunk to a thumb is no time like the present. Electric isn’t smooth and precise that it easily over or radio glitch, it will still be here in 1987 about to happen, if has happened! shadows the 05 planes. too. You see, there is no fuel residue Electric power is waiting for you; are you So what is so important about an eating away at the innards of my model. up to the challenge? Until next time, get aerobatic model of this size? It’s real The only cleaning my Chipmunk re- a charge out of flying electrically. · OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 69 ers? Ever see storks in flight with their BIG BEAUTIFUL BOAT long legs hanging way out past their empennage? Same idea . . . nature’s aid ☆ to a short moment arm!” THE WAY IT WAS Gerald E. Myers, who recently de V M N č £ R signed the Zippy Sport, Alco, and Water J-5 PICKLE FORK HYDRO UNLIMITED man racer kits for Indoor Model Supply, K č S é A R £ f f 6 foot 5 inch long by 3 foot beam mahogany is also an aviation history buff. He plywood Kit A spectacular sight on the water encountered a fascinating data chart in a Get in on the giant R/C Boating Fun All wood kit 169.50 Chilton Aero Directory and Catalog, and I BUILD YOUR Above kit c/w J-5 DRIVE-TRAIN 239.50 was kind enough to share it with us. Published during 1931, it offered an OWN ROCKET J - 5 ENTERPRISES interesting insight in its introductory 256 Schuman Dr., Newmarket. Alabama. 35761 Phone 1-205-852-2566 paragraph; it referred to aviation as “ this MOTORS! P.O. Box 82 Belm ont, O ntario NOL 1B0 branch of the automotive industry” ! WE CAN SHOW YOU HOW! Phone 1-519-644-0375 From the detailed state-by-state infor • Our truly magnificent NOW PRODUCED IN THE U.S. mation for the year 1930, we abstracted THUNDERBOLT engine carries the following selections: a full 4 oz. of propellant and Number of Licensed Aircraft rises beyond 3000 feet in Beach, California has been favorable. registered aircraft pilots factories altitude testing. The machine is housed in an enormous Alabama 45 64 1 • With our literature and dome adjacent to the ocean liner Queen California 1.175 2,852 32 some simple tools that 1% 0 you make yourself you Mary, and the current advertisements Florida 135 can build a DOZEN of suggest which may be attracting the Georgia 74 71 2 them in an evening for most attention: “ See the plane, but Iowa 176 265 6 LESS THAN 50C each don’t miss the boat.” Kansas 312 273 19 • We offer plans for FIFTEEN other rocket Actor Jimmy Stewart (who is also a Montana 70 75 0 engines TOO! All can be built by you in your New Jersey 301 404 8 own garage or workshop for 1/5 to 1/10 of model builder) was on hand for the New York 1,193 1.641 31 what you'd have to pay if they were com ribbon-cutting ceremonies. As a friend Ohio 582 802 10 mercially available, which they are not. of Howard Hughes, he had been present Although this is an arbitrary sampling, • INTERESTED? Just send a self addressed during the flying boat’s one-and-only stamped envelope We re fhe DO IT YOURSELF we found it intriguing. Note, for in ROCKET people. flight. According to an Associated Press stance, how similar the figures are for report, Jimmy quipped: “ My bet was Write to: Department L Pioneer Research. California and New York, at opposite 11620 Kitching SL Sunny mead. CA 92388. that he was going to take off, fly across ends of the continent. the country, land in the Potomac, and turn the plane over to the government." THE WORLD OF MODEL AIRPLANES SKY SPY Brand-new this month from Charles Carl Hatrak favored us with the Scribner’s Sons, New York publishers, is Hannan...... Continued from page 57 January 27, 1983, Lockheed Star news William Winter’s long-awaited book. Bill is, of course, well-known as the former Ohio 43469. These are the French Bloch letter, which announced that Kelly Johnson, designer of the U-2, has been editor of A ir Trails, M odel Airplane MB-151, available in both Peanut and News, American Modeler, Junior Walnut scale, and a 23-inch span North listed as . .one of the ten greatest spies of all time.” Modeler, Sport Modeler and other American 0-47A. Included are building periodicals. His previous books have instructions, markings information, and MINI-MODEL included The Model Aircraft Hand a reference list. Diels’ line now consists Also mentioned in the Lockheed Star book, War Planes of All Nations. Hand of some 24 Peanuts, 10 Walnuts, and a was William Yates, who carved a model book of Model Planes, Cars and Boats, twin-engine Westland Whirlwind adap Lockheed L-1011 out of a kitchen match, How to Build Radio Control Models, table to either rubber or CO2 power. spanning a mere four-tenths of an inch! Radio Control Handbook, Radio Con Why not send Dave a stamped, pre PROGRESS? trol for Model Builders, and in con addressed envelope for the complete From Herb Kelley, of Yucca Valley, junction with Walt Schroder, Gas Models list? California: . . Early designers did very and Engines .. . and more. Earning a AND ON A LARGER SCALE well with what they had to work with, living by writing about model aircraft is If your interest runs to Quarter Scale, and much less knowledge of what was quite an accomplishment under any you may wish to investigate the Golden going on than the designers of today circumstances, but to raise nine children Age racing plane drawings being mar have at hand . . . They did have, by and at the same time is truly heroic. So much keted by Burt Thompson (Thompson large, good solutions to the problems for accolades to the man, but what about racers . . . of course!). they faced . . . it does seem to me that his new book? Burt is a cartographer in real life, and the basics, as found out over the years, Physically, the hardbound volume thus is quite accustomed to working on have not been given enough attention, measures 7-1/2 x 9-3/8 inches, contains large projects, although his experience and gadgetry has become the fad.” 294 pages, hundreds of photographs, also includes a line of small solid model FLYING WING STABILITY CURE? plus an almost countless number of line aircraft kits a few years ago. Joe Bickinella offers this slightly illustrations. The latter, by H.A. Thomas, Present plans for Giant Scale are: tongue-in-cheek suggestion for im Hank Clark, and Herb Clukey,should be Benny Howard's Ike, Art Chester’s Coon proving the flight of scale model flying an inspiration to budding illustrators. As and leep; Hughes' 1-B. In the works is wings. After noting problems encoun an example, in place of the usual photo the Crosby CR-4, surely one of the most tered during the recent Northrop con graph of a workbench covered with attractive racers of all time. A stamped, test, he suggests: “ Get four lengths of tools of the model building trade, Hank pre-addressed envelope will bring you a knitting yarn about six to eight inches Clark has, instead, carefully drawn ink complete description from: Thomp long. Tape or spot-glue the ends, one sketches of everything from basic hand son’s Vintage Era Race Plane Classics, 219 each, to the top and bottom of the tools through drafting supplies! One White City Blvd., Springfield, IL 62703. rudder: the other two, one each side of can only imagine the man-hours As usual, we ask you to mention Model the fuselage, just aft of the cockpit. Get invested. Builder. the picture? Let them stream out in flight Presented in the book are chapters on ANOTHER HUGHES PRODUCT under power. Should act as a stabilizer in history; the three “ families” of models Evidently the public reaction to the effect. Not scale you say? Can you prove (F/F, C/L. R/C); materials; tools; con Hughes flying boat exhibit in Long some dashing pilots didn’t add stream struction; power sources (gas, glow, 70 MODEL BUILDER diesel, CO2, compressed air. rubber, electric); covering and painting; flying techniques; a glossary of terminology; » + and an index. Clarity of communication is a Bill Winter trademark, as he has amply SOUTHERN PRO RETRACTS demonstrated in his latest publication. Further, he has gained the cooperation of some of the most proficient model builders and photographers in the hobby, including such acknowledged Formerly: “ names” as Don Srull, Bill Noonan, John SERVO Oldenkamp, Cynthia Sabransky, John ACTUATED PRO-LINE Preston, and Doug Pratt. In short, if you needed a single book FOR and to explain the attractions of model SOUTHERN R/C aircraft building, it would be difficult to RELIABILITY top this one. You've earned a rest, Bill Winter! SIGN-OFF WORDS OF WISDOM: The fewer functions any device is " I f THE RADIO WORKS THE LANDING GEAR WORKS. required to perform, the more perfectly IF THE RADIO DOESNT WORK, IT DOESN'T MATTER" it can perform." (Author unknown.) · SEE YOUR DEALER OR DISTRIBUTOR Choppers .... Continued from page 35 DAVE BROWN PRODUCTS 4560 LAYHIGH RD.. HAMILTON. OHIO 45013 Ph. (513) 738-1576 of the rotor disk comes directly in, while the air at the rear of the disk is sucked down from way above as it is accelerated depends directly on the chopper’s size. through the disk. This differential of Small helicopters, such as our models, inflowing air is called transverse (low go through ETL at less than 10 knots, and VINTAGE M FLANS effect, the major factor involved as the probably between three and five knots is helicopter accelerates into forward a more realistic number. Smaller full- flight (or at a hover with a 10-knot size ships hit ETL between 10 and 15 knots, while larger helicopters find CONSOLIDATED headwind). ΡΒΥ-5Δ "CATALINA” To keep it in practical terms, the air in effective closer to 20 knots of airspeed. 9 FT. WING SPAN the front of the disk stays on each rotor The reason is fairly simple, it takes a ALL RIBS 8 FULL FORMERS SHOWN ON PLANS 11 brisker wind to blow through a 50 foot PLASTIC FNG.COWLS $ 9.90 PR. blade for a longer period of time, while CLEAR GUN BLISTERS $ 6.60 PR the air in the back of the disk is ac rotor disk at the same speed as a much 4 L A R G E p l a n s h e e t s — Plans $16 9 5 celerated through in an instant. The smaller five-foot rotor disk. . . 6 f t . WING SPAN MODEL PBY-5A important point is that in this condition IN FORWARD FLIGHT In Figure 6, the helicopter has passed engine cowls 1 6.50 pr. plans $ 12 95 the front of the disk develops more lift G U N BLISTERS S 4.50 PR ADD 42.50 POSTAGE than the rear of the disk. This sets up an completely through ETL. The helicopter aerodynamic imbalance that will make can be flying forward at 20 knots, or CATALOG-OVER_____ 50 PLANS_ J I 00____ DEALERS WRITE the helicopter vibrate. hovering over one spot with a 20-knot WORLD WIDE Have you ever noticed that under headwind. No difference. The incoming SID MORGAN some conditions the helicopter is air is smoothly accelerated down 13157 ORMOND .BELLEVILLE , MICH.48III u.SA. smoother than others, yet nothing has through the rotor disk and the tail rotor been changed? Most of this is due to is working in clean air. Because there is current aerodynamic influence on the transverse flow in the rotor disk, causing now a greater volume of air for the rotor rotor disk is called dissymmetry of lift. To the aerodynamics to shake the heli disk to use, the power required is less regress for a minute, in a no-wind hover, copter. than at a hover. And as the airflow over the airspeed of each blade is equal. (The Under transverse flow, the disk will the tail rotor is smooth, it works more rotational velocity of the rotating blades also have a tendency to "blow back,” as efficiently too, requiring less pitch to as a disk.) See Figure 7. more lift is being produced at the front produce the same amount of anti As the helicopter goes into forward of the disk and less at the back. This is torque. (The tail rotor also goes through flight, one blade becomes the “ advanc why you have to give a distinct amount its own ETL.) The forward speed tends to ing blade” and the other the "retreat of forward cyclic fairly quickly as the weathervane (he helicopter, auto ing blade". See Figure 8 for an example helicopter starts moving forward. The matically keeping the tail in line with the of this. Here I'm using a full-size example same thing happens when you hover in a forward flight path. with a forward airspeed of 100 knots, and 10-knot headwind, you have to give Several years ago, Westport Inter each blade’s rotational airspeed of 400 forward cyclic to hold the helicopter national’s Variant radio came with a dual knots. The rotor rotation is in a clock over one spot and at the same time trim switch; one setting for hover and wise direction. The blade on the left is counter the blow back of the rotor disk. one for forward flight. They recognized advancing, and it’s airspeed is rotational The point I’d like to get across to you is the differences in trim between hover velocity (400) plus forward airspeed do the fine tuning of your helicopter in a and forward flight. The only thing was (100). The right blade is retreating, with no-wind condition, where any changes (and still is) that you could only keep it’s airspeed rotational velocity (400) can be noticed directly. Trying to track a track of so many things at one time, and minus forward airspeed (100). The dif helicopter in a gusty wind is fruitless; it was too much trouble to flip from ference between the two blade’s air one instant transverse flow is aero- hover trim to flight trim during the speeds (200 knots) is dissymmetry of lift, dynamically shaking the helicopter, the transition between the two. This is which wants to roll the helicopter to next instant it is not. especially true now with helicopter the right. One last distinction I should probably radios being equipped with dual rates. The helicopter in slow forward flight make concerns when the helicopter will DISSYMMETRY OF LIFT has very little dissymmetry of lift, so it reach effective translational lift. It Finally, we’re in forward flight. The doesn’t roll much, and little correction is OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 ^ THE BEGIN -AIR TRAINER ALL HAND CUT AND MACHINED PARTS Wing Span: 54" Wing Area 540 Sq. In. Weight: 3Vi lbs. Engine: H.B. .25 No. Channels: 3 or 4 * 8> \,ο 'νΛ Flat bottom airfoil for easy stable flight. BUZZ WALTZ R/C DESIGNS 255 North El Cielo Suite 476, Airport Park Plaza VISA Palm Springs, CA 92262-6914 DIRECT SALES ONLY BEGIN/AIR FLOAT KIT $26.95 & $2.50 handling BEGIN/AIR kit & H.B. .25 Engine combo $81.95 & $2.50 Handling Available in Canada through WINDMODEL. P.O. Box 23142, Vancouver. AMF, B.C. V7B1V6 Write for Addl. Info symmetry of lift! What flapping and feathering do not KIMBROUGH take care of is a rolling tendency (to the R/C Boats .... Continued from page 43 right) for which we actually give slight PRODUCTS left cyclic to correct. Now, read the about it? Has anyone out there come SERVO SAVERS TRANS-GRIPS next few paragraphs carefully because across a method of attracting ducks away it’s all going to fall together. from racing activities? My address is at s e r v o a r m s A d if f . gears The degree of rigidity in the rotor the end of this article, and I would head determines how much flapping or appreciate your ideas. feathering takes place. In the Heli-Baby DISQUALIFIED or Revolution 40, the free-teetering In model boat racing, "disqualified" is ACCESSORIES heads flaps a great deal, so very little about the most serious penalty that can 1430 E.ST. ANDREWS PL.UNITE. cyclic feathering is needed in forward be levied against a competitor. Basically, SANTA ANA CA. 92705 flight. In the SuperMantis, half of the it means “ you really goofed,” bring your PHONE 714 557 4530 compensation for dissymmetry of lift is boat off the race course. In the last done by the disk flapping, and half is couple of contests I’ve attended, I’ve DEALER & DISTRIBUTOR done by cyclic feathering. In the Com managed to get myself disqualified INQUIRIES WELCOME petitor, with a nearly rigid head.thedisk twice. The reasons for the disquali flaps very little and nearly all compen fications were different each time, but needed. But as the airspeed builds, the sation for dissymmetry of lift is done by the end result was the same: I received tendency to roll is more pronounced, so the disk flapping, and half is done by no points for that heat. more correction is needed. There are cyclic feathering. In the Competitor, The most common reason for a dis two ways to compensate for dissymmetry with a nearly rigid head, the disk flaps qualification that I seem to notice is for of lift, by blade flapping and blade very little and nearly all compensation striking a dead boat or hitting ducks. It feathering. for dissymmetry of lift is done by blade was for hitting a dead boat on the back- BLADE FLAPPING feathering. In the Horizon (a flybarless, stretch with my 7.5 tunnel that I received Because the advancing blade is gain rigid rotor) there is literally no flapping, one of my disqualifications. Dead boats ing lift as it comes around, it has a ten it’s all feathering. and sitting ducks are not easy to see dency to climb, or flap up. As it flaps up, As the rigidity of the head increases, when you’re attempting to race a model the angle of attack changes causing less the transmitter stick will have to be boat. Keeping an eye out for such lift to be produced. Conversely, on the moved more and more forward (and objects is really an important job for retreating blade lift is lost and it des slightly left) to compensate for dis your pit person or driver’s assistant. It is cends, or flaps down. As it flaps down, symmetry of lift as the forward speed the driver assistant’s responsibility to the angle of attack changes again caus increases. Each helicopter design will keep the racer informed about what is ing more lift to be produced. In this way, have different movements. This is normal happening around the race course. It the rotor disk automatically tries to level and necessary. always amazes me how with all the space itself and correct for dissymmetry of lift. This is one reason why a Cricket will there usually is around a boat that is As one blade flaps up, the other blade is feel different than a Competitor in dead on the racecourse we still manage flapping down, so the whole rotor flaps forward flight. Yes, they are different to smack stalled boats as often as we do. as a disk about the main shaft. helicopters, but in the end the rotor It would seem that stalled boats have BLADE FEATHERING design dictates how much the tx stick some type of magnetic attraction to Here the pilot manually makes a cyclic will have to feather the blades in forward those boats still running. (Ah ha, another change which directly controls the pitch flight. corollary to Murphy’s Law! wrf) of the blades. Due to gyroscopic pre Full-scale examples would be a Jet- It’s been my experience that disquali cession the max blade pitch is put in 90 Ranger, which has lots of flapping and fications resulting from racing action degrees before max flapping. (See the relatively little feathering, to an A-Star, between two or more boats is not called Dec. '82 and Aug. ’83 issues of MB for a which has some flapping and some all that often. In NAMBA, a driving review of the gyroscopic precession.) If feathering, to a rigid rotor Boelkow BO violation can result in disqualification if we go into forward flight, giving forward 105, which has little flapping and nearly it causes the other boat to quit. If the cyclic reduces the pitch on the advanc all feathering. violation does not cause the boat to quit ing blade, which flaps down over the I've covered an awful lot of ground it is a one-lap penalty. nose of the helicopter. This same for this month. I hope its helps you to However, some of the things our ward cyclic also increases the pitch of understand a little bit better how the boats do during the action of a race are the retreating blade, which flaps up over rotor system changes as the helicopter is not what we intend for them to do. the tail. This does two things. It causes pushed from a stable hover into forward While attempting to keep the lead in a the helicopter to move forward, and it flight. Hope to see race with my 3.5 tunnel, my boat hooked takes lift out of the advancing blade and you next month. · and smacked into the boat trying to pass puts pitch into the retreating blade, me. My boat kept running, but my automatically compensating for dis opposition was knocked out of the race. 72 MODEL BUILDER I was disqualified. It was the correct call under the circumstances. Even though I didn’t mean to have the boat hook, I had to assume the responsibility for what the boat did. The point I’m attempting to make here is just being sorry for something your boat did is not grounds for having a disqualification call being dropped. I have been to contests where a racer who Nick Ziroli's F4U “ CORSAIR ” has been disqualified has tried to avoid A memorable WW II Navy Caine« FiQftte·. it’s a aupetb I href· the decision by pleading he didn't mean For 2 to 4 Cu. In. size Engines for his boat to hook, side, veer, or GIANT R/C SCALE PLAN DESIGNS whatever it did to cause the infraction. AT-6 TEXAN” 2.4' =1 101 Spon $27.00 p.p. U.S.A. FOKKER DR-I 2.7’ = | 63 Tripe $25.00 p.p. U.S.A. Under all circumstances, the racer must F8F BEARCAT” 2 % ’ = 1 86 Spon $27.00 p.p U.S.A. CURTISS P-40 2%* = 1 94 Span $27.00 p.p. U.$.A. assume responsibility for the actions of F4U CORSAIR" 2% ' = Γ 93 Span $27.00 p.p. U.S.A. Fiberglass Cowlings A Canopies .ve available also Send a his model. Just because the boat is stamp lor detailed brochures on our Giant Scale Accessories momentarily out of control does not (Our Plans are sent Postpaid within the U.S.A ) mean the driver is relieved of the NICK ZIROLI 29 Edgar D rive. Sm ithtown. N.Y. 11787 responsibility of the actions of the model during that time. Hotshot IV. During the first part of this One more thing while we’re on this year’s racing season, I had the oppor topic. Should your model be the cause tunity to race a pre-production version of an accident, don’t assume that the built by Carl Atherton of Dumas Prod others involved know you feel sorry for ucts. I was supposed to test the boat and causing the problem. No one will think then send it back down to Carl. How of you as being “ less macho” because ever, I liked the way the boat ran, and you tell someone you’re sorry for what was able to talk Carl out of the boat until happened. There’s no doubt it wasn't I had a chance to build one from the kit. what you planned to have happen. I do Of course, I wasn’t able to just leave not believe anyone goes out with the the boat alone, even though it did run intention of causing an accident. How very well. The first thing I added was the ever, as long as we continue to race our front bow wing. A photo of this addition model boats, we will continue to have appears in this article. I found that the accidents. Be mature enough to assume boat would stay down better when your responsibilities and don’t be too running into the wind with the addition proud to say you’re sorry. of the front wing. DUMAS HOTSHOT IV The other addition I made isn’t ap What happens when you take the parent unless you look underneath the Dumas Hotshot 45 and reduce it down boat. What you would see are two for the 3.5 K&B Outboard? You get the wedge-like devices, one inside the new Dumas Boats "Hotshot IV.” After tunnel and one located at the front of designing the boat that would become the tunnel. The idea of using these the Hotsnot 45 in the summer of 1981, I wedges is to eliminate spinning and got to thinking that the design might hooking while cornering. Rod Geraghty, work well for the 3.5 outboard engine. I an excellent model builder from Seattle, reduced the plans for the 7.5 down to developed this idea. I created my what seemed to be a reasonable size for wedges by simply Hot Stuffing strips of the 3.5, and the results proved to be very 1/16-inch plywood inside the tunnel. competitive. I have raced prototypes of I’m currently using three wedges on my the new Dumas Hotshot IV for almost 3.5 and 7.5 tunnels. two years and have done extremely well. What purpose do they serve? Basically When I mentioned to Jay Brandon, the wedges assist in keeping the boat president of Dumas Products, that I had riding up through a turn. This prevents designed a 3.5 tunnel based on the the sponsons from catching too much larger Hotshot 45, he expressed an water and causing the boat to hook or interest in offering it as a wooden kit. spin. They do nothing to increase the The Hotshot IV is now available as a kit top end speed of the boat. However, I featuring plywood and spruce for have turned faster times on the course credit for developing. These steps assist materials. because I’ve been able to corner wide in breaking up the water and reducing The construction techniques used on open without worrying about hooking the wetted surface on the sponsons. The the Hotshot IV are identical to those in the corner. result is better hull speed in both the used on the Hotshot 45 and most other Finding the correct depth for the rear turns and straightaways. wooden tunnel hulls. The basic frame edge of the wedge is mostly a matter of To the best of my knowledge, the work features egg crate construction. trial and error. The wedges on my 3.5 Hotshot IV is the only 3.5 wooden tunnel The use of instant glues like Hot Stuff, tunnel are 7/8-inch in width, eight kit to be released in the past few years. It Zap, Jet, or whatever, really speed up the inches log, and 1/2-inch at the back is an attempt to incorporate the best of building process required for a wooden edge. The 7.5 wedges are 1-1/4 inches what I’ve found in model tunnel designs. kit. I have found that by inviting a friend wide, 11 inches long, and 1-1/8 inches The two additions, the bow wing and over to help in the assembly of a wooden deep. Running the wedges deeper wedges, will be available in the second model, I can almost hand clamp most caused the boats to slide out in the production run. However, I will gladly parts while I wait for the instant glue to corners. This modification is being used provide anyone with full-size drawings kick off. Using the new accelerators, like by lots of the tunnel racers in my area. It of the modifications I made. All I ask is Hot Shot, helps make the glues that are seems to work on a variety of tunnel that you provide a stamped, self- thicker, like a Super ‘Τ’, set up almost as designs. addressed envelope. My address is: soon as the accelerator is applied. The sponson bottoms of the Hotshot Jerry Dunlap, 119 Crestwood Dr. S.W., I haven’t yet built the kit version of the IV are stepped, another idea I can’t take Tacoma, WA 98498. · OCTOBER 1983 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 73 top of the rudder and slip the brass rod of the rudder assembly into the bearing THERE IS tube. Hold the rudder up against the tube with a length of tape bridging the A DIFFERENCE. rudder to the hull. Pierce a small piece (1/2-inch square) of sandpaper on the BEECHCRAFT SKIPPER: Quarter-Scale. 90" wingspan, 1,200 sq. in. area. .90 or tiller and slide it down to the tube and larger engines. Plans, $18.50 place a brass washer on top of the Other plans: sandpaper. Very quickly, solder the BEECHCRAFT BARON MODEL 58 2 W Scale 85 washer to the tiller rod without excessive wingspan-1000 sq in (3) 3 x6 sheets $15 00 Beechcraft Fin Insignia $2 00 heating of the brass rod so as not to BEECHCRAFT BONANZA A36: 2*i Scale 86 affect the solder or epoxy at the rudder. wingspan-1300 sq m (3) 3'x6V7- sheets $17.50 The sandpaper retained a space between Add $2.00 postage Inside U.S. & Canada Include $2.00 for plan rolled In tube the washer and tiller during soldering; remove it now. 01 - $4.50 0T - $5 60 01 · $7 60 Overseas orders add $10.00 postage GAL - $13 45 GAL · $18 95 GAL - $35 90 Alabama residents add 6% sales tax Using small needlenose pliers, very DRUM ■ $180 00 DRUM ■ $320 00 DRUM - $500 00 BUD CADDELL carefully bend the tiller forward and (Drums available directly from factory) 1525 Badham Dr Dept M, Birmingham. AL 35216 then gently upward as shown on the 205 822-4312 profile. The tillers are connected to each Duke Fox was flying model ______DEALER INQUIRIES INVITED______airplanes in the 30's with alcohol other with a sheet brass steering arm or fuel he mixed himself. In the early tie-rod. Notice the 1/6 x 3/8-inch slot for 40's he discovered the miracle of should be well sealed with several coats the servo arm pin. We used a 1/16-inch nitromethane when the total world of sealer and at least two applications of bolt, threaded into the servo arm hole production was less than a quart a paint. from the bottom, and with the loosely day. He has worn out more motors Plywood and balsa supports, boxes, fitted nut secured to the bolt with epoxy. in life tests than most fuel and platforms are added now. These The propulsion drive train consists of producers ever owned. should be adapted to the equipment electric motors, propellers, shafts, and The Result — used and will not necessarily be identical universal joints. Our model used one He knows a little about what it to that shown on the plans if different large motor on the center shaft and two takes to make your motor run well equipment is installed. The supports can smaller motors on the outboard shafts. and last a long time. be painted if desired. The motors we used have no integral Use Fox fuel...it costs little more Skegs are made now if a triple screw mounts, so aluminum strips are used to and your motor will last a great model is desired. Cut four skegs from strap the cylindrical motors to plywood deal longer. Our Hoi Line: (501) 646-1656 1/8-inch plywood, mark off the shaft mounts prior to installation. tube location, and cut grooves for the After the universal joint is attached to F O X MFG. CO. shaft tubes as was done with the keel. the motor, and the propeller to the Sandwich the tubes between the ply shaft, the shaft is inserted into the tube 5305 T0WS0H AVE FORT SMITH. ARK 72901 wood using plenty of cement, and set and the universal connected to it. With aside to dry. Mark off the skeg locations the entire drive train connected from on the hull, make a hole for the shaft motor to propeller, the motor is maneu tube, and cement the skegs to the hull Missile Boat. . . Continued from page 12 vered into position so that the universal bottom. Note that the skegs are parallel is at its straightest and the propeller is to the keel in section view as well as the about 1/16-inch from the end of the has dried. These are then cemented to plan view. They are not perpendicular to shaft tube. At this point, the plywood the chine, bulkheads, and the edge of the hull bottom, and therefore the top motor mount can be cemented to the the bottom covering as well as to each surface must be beveled to compensate hull structure, keel, and chine. other, using plenty of cement. The bow for the sloping hull bottom. When the cement is dry, rotate the pieces must be bent slightly with the The rudders are located directly propeller by hand to be certain the shaft grain to follow the hull contours to behind the outboard propellers and are doesn't bind, then connect a battery to bulkhead "A ". Let the hull assembly dry cut from brass following the outline in ensure good operation. thoroughly. the profile. Make the bottom 90-degree The space between the motor mount Remove the hull from the worktable bend of the four-inch long brass rod and the hull bottom is filled in with balsa and add the bow blocks to each side of rtiller/rudder posts, and solder to the wedges and firmly cemented. Check the the keel and bulkhead "A ” . We lami inner surface of the rudder as shown in shaft again and then apply cement nated the bow. but single piece blocks the profile. Epoxy can be used instead of around the motor installation. There is can be used. Sand the hull thoroughly solder if desired, but this must then virtually no vibration with electric with a sandpaper block. The chine strap cover a much larger area of the rudder, power, and therefore the rugged mounts is added next. completely covering the rudder post. used for reciprocating engines are not The hull interior consists mainly of Cut the tiller bearing tube and the necessary. supports and boxes for equipment such balsa bearing braces. Make holes in the Apply several layers of cement around as the servos, batteries, receiver, etc. bottom for the bearing tubes and insert the shaft tube at the point of hull Before any work is done on the interior, the tubes, allowing about 1/8-inch to penetration. Our propellers are epoxied all hull covering joints should be re protrude from the hull bottom. The fit to the shafts. If the hole in the propeller cemented. through the hull should be snug so the is too large, epoxy an aluminum or brass It is a fact that all propeller shaft tubes tubes will remain erect when so placed. tube bushing between the prop and fill with water, in full-size ships as well as Cement the inboard brace to the tube shaft. models. If the point where the tube ends bearings and hull bottom. The servos can be installed now. We inside fhe hull is below the waterline, While this is drying, gently slip the held our servos in place with a dab of water will seep into the hull at a very tiller/rudder post into the tube using it G.E. Clear Silicone Glue and Seal. This slow rate . . . a matter of drops now and as a guide to ensure that the bearing dries to a rubbery consistency, absorbs then on the average model. If water tube is vertical. When the cement is dry, vibration, holds broad surfaces together seeps into unprotected wood it will ruin recheck the tube position and then add very well, and does not affect plastic. a beautiful model by swelling and the remaining braces. This installation The servos can be removed when de warping the wood, causing fhe exterior must be recemented several times and sired with a slight twist and lifting paint to crack and peel. In order to reinforced with cloth (or silk) and motion. Of course, the servos can be prevent this, the entire motor compart cement. screwed or bolted into place as desired. ment. between bulkheads "G"and “ H” . Place a brass washer on the tiller at the The missile servo arm presses a spring- 74 MODEL BUILDER loaded push-button switch to close the circuit and ignite the missile. This servo • 6 CHANNEL RECEIVER* is located between plywood pieces. The • 4 MIDGET SERVOS (NES-1 A) switch is mounted into the plywood in • 500 MAH SQ. BATT (SANYO) o v a k line with the servo arm. Rubber bands or N tape can be used to hold the servo in • AILERON EXTENSION ELECTRONICS place, or a dab of silicone will do. Check • MINI SWITCH HARNESS the operation of the missile firing servo to be certain it presses the switch. Propulsion wiring should be multi strand. insulated, and of a much heavier gauge than electronic wiring . .. almost like that used for electrical items in the home, such as lamps. We used mini- alligator clips here and there to enable equipment such as the batteries and the propulsion servo to be easily removed and used in other models. This is, of course, entirely optional. The missile ignition wire can be thin because it must be flexible in the hangar. Deck installation is started by fitting the deck to the hull and, when the location is correct with equal overhang on the sides and stern, the bottom of the Futaba/compatible plugs. Matches all modern TX. Plug-in crystal included. ^Specify Frequency. Add S2.S0 UPS Calit. residents, add 6%. Allow 3-4 weeks tor deck is marked with the hull location as a checks Send 9Ά x IVA SASE lor tree brochure guide for final cementing. We also 2709-C Orange Avenue, Santa Ana, CA 92707, (714) 549-3741 marked off the bulkhead locations on the bottom of the deck. Place the deck, Next, you must seal the hull and inverted, on the worktable, propped up deckhouse after both have received a with books or other flat objects to raise thorough final sanding. We applied a C 02 ENGINES the coaming off the table and evenly coat of sealer to each, and then set them support the deck. Use a relatively slow aside to dry thoroughly while the various drying adhesive (we used Ambroid) and details were assembled. The hull should apply it to the inverted deck along the receive at least 10 or 12 liberal brush j marks denoting the structure locations. coats of sealer, preferably more. The ' Aik-:· V Also apply cement to the upper edges of deckhouse should have about a half- WE NOW HAVE A COMPLETE LINE OF the bulkheads and hull sides. Quickly dozen coats. Sand after each coat is BROWN. TELCO and DAVIS CO-2 ENGINES place the inverted hull atop the inverted thoroughly dry. As an alternative, the INCLUDING SPARE PARTS and SERVICE deck in its proper location, pressing entire hull can be covered with light BROWN TELCO Λ-23 PEANUT $39 95 STANDARD TELCO $24 95 down gently to make a firm contact. weight fiberglass cloth and resin, to both CAMPUS BEE $34 95 TURBO 3000 $32 95 When thoroughly dry (at least three CAMPUS TWIN $59 95 T U R B O 60 00 $3 6 95 seal the wood grain and at the same time SODA CHARGER $ 1 2 9 5 hours), additional cement can be wiped add strength to the hull. DAVIS- COX 02 CONVERSION TO CO-2 $39 95 into the external hull/deck joint for Details, such as guns, gun director, NEW! CATALOG No. 25 - SJ.50 both strength and appearance. The deck gun director platform, and mast assem T iÆ f should fair into the bow block with no bly, can be fabricated while the hull’s Peck-Polymers BOX 2498-MB LA MESA. CA 92041 . overhang. coat of sealer is drying. Each item is The deckhouse is a simple 1/8-inch made as a sub-assembly and finished sheet balsa box. Cut the sides, ends, and completely before it is mounted on the forward) launcher is operational. top to size. Notice that the house front is boat later. The mast is carved from balsa Hangars are completed first and then 3/16-inch balsa, and that the house to a tapered, circular cross-section, and installed on the deck. extends beyond the deck opening. A 1/8 the spar is a round toothpick which is The scale hangars are made from 1/8- X 1-3/4 X 2-1/4-inch balsa house bulk cemented in a hole drilled through the inch balsa and a hard, smooth construc head is necessary to make the deck mast. We sim plified the mast radar tion card sometimes called oak tag. Cut house fit the coaming properly, and it antennae and light supports: instead of the 1/8-inch balsa hangar base rectangle will act as a substitute house front. Pin fabricating an intricate scale structure, and cement piece “ M ” and the 1/8 x this bulkhead and the house sides and we cut the supports from 3/16-inch 7/16 X 2-1/4 balsa piece to it. Cut the rear to the sides of the coaming with the balsa, and (after painting) the structure hangar top in one piece from oak tag bottom edge of the house sides, rear, was simulated with strips of black Sig using the pattern on the plans. Bend 90 and bulkhead touching the deck. Stripe-Rite. The balsa hatches and diesel degrees where shown. Notice that the Cement these four pieces together but air intake should all be fabricated, sealed scale hangar pattern omits the back do not cement them to the coaming or and painted along with the other details pieces because of piece "M ". Also note the deck. Cement the house front to the and cemented in place later. that the forward and aft hangar tem sides followed by the deckhouse top. A wide choice of national flags can be plates differ in the angle to the deck (the When thoroughly dry, remove the flown on your Osa boat because the aft hangars are positioned at a greater assembled house and recement all Soviet Union supplied many to its allies angle). Trace and cut the templates interior corners. Sand with a sandpaper and military hardware clients. See last accordingly. Cement the oak tag to the block, and then add the 3/16-inch balsa month’s Model Builder for the complete base and back of the hangar, bending it wheelhouse top and sides. Notice the list of nations operating the Osa boats. around the top and following the back piece “ M ” , Hold with pins until dry, shape of the wheelhouse sides, tapering We used a double flag . .. Indian on into the deckhouse side; however, the then cement front piece “ L” in place one side and Iraqi on the other! tops of the sides are flat and not rounded and cement the bent bottom flaps off at all. Round off the house front as The missile hangar/launchers on this together. The scale door, piece “ N” , is shown on the plans, and then add the model are of two types: operational and sanded and sealed before the 1/16-inch sides and front of the flying bridge. scale. This model has one operational balsa stiffeners are added. The door is Round off the bridge front when the and three scale hangar/launchers. The added to the hangar after the hangar has cement is dry. forward, starboard (right side looking been sealed. OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 75 A little bit of lightweight fiberglass cloth OVER 50 CONSECUTIVE STARTS WITHOUT RECHARGING and resin can be used, if desired, at the INTRODUCING THE joints. NIST ARTER “ It is not necessary to install the rocket PAT Pf W ING motor retaining wire nor the engine A new and completely revolutionary concept ol p o w e r for glow plugs in model cars, boats, air catch hook, as is done for vertically planes. helicopters, anything using the 1.5 vt. launched model rockets. We found that, S ta n d a rd plug for glow engines Rechargable. (up to 1000 times) Fits in your pocket. Works if the rocket engine is allowed to eject sideways or inverted. Fitsthroughcowlings. Uses itself, the missile will float in the water. If H e a d L o c k plug adapter. Stays on the plug, not in the propeller Incl. charger & instructions. the rocket engine is such a loose fit in 90 day guarantee After that, if anything fails the body that it could fall out while in (normal usage) we will repair or replace it for only $0. for up to one (1) full year!! SEE YOUR the hangar, bind the rocket engine with DEALER OR CALL US · BANK CARDS OK. COD OK. YOU PAY SHIPPING . __ a band of tape to increase its diameter, $21.95 until the fit is snug but not tight. The See Your Dealer scale color of the full-size Styx is not 13506 Glendundee Dr. known. Ours are painted bright yellow ^ * u / k Herndon, VA 22071 or orange, with a black nose to simulate a radar dome. SERVICE (703) 435-5805 Painting should not be started until all flaps 90 degrees, gently and carefully wood is well sealed. The hull sides, gun bend the sheet aluminum to shape with assemblies, hangars, mast assembly, ” ANOTHER GREAT WINDER" the fingers. The top is rounded with the anchor, hatches, and reels are painted sides vertical and in line with the sides of light gray. The remainder of the model is IMPROVED dark gray, except for the gun director SMOOTHER the base. Before the hangar is per manently attached to the base, it should array dome which is white, the bitts and L ilt - $64.95 be temporarily taped in place and the the entire area within the exhaust stack Plus shipping missile installed on the launching rails. which is black, and the hull below the Be certain that the missile fins and wing waterline which is red. clear the hangar by at least 1/8-inch for Final assembly is accomplished after the entire run on the rails. The hangar is all pieces are painted. The wire nail JOHN MORRILLS "SIDEWINDER" held to the base with thin, headless stanchions and soft wire railing are brads, or short model pins driven installed last. The hangars should be Precision Built Heavy Duty Winder! located about 1/16-inch away from the Turn Counter kit - $18.00 through the sides of the aluminum and $1.00 FOR CATALOG into the base. No door was fitted to the deckhouse. Holes must be drilled into hangar and the overlapping back pieces the deck for the operating hangar JIM CROCKET REPLICAS need not be joined in any way except to J-bolt nuts and for the missile ignition wires which should be passed through P.0 BOX 12600 make physical contact with each other. the deck and hangar base as the hangar FRESNO. CA 93778 The Styx missiles used with our model is cemented to the deck. were assembled using standard Centuri The boat is propelled by a six-volt The operational hangar/launcher is rocket components such as balsa nose propulsion system. A 12-volt system can made from sheet aluminum, bent 90 cones, and body tubes. The fins and be used if desired; however, it is impor degrees where noted on the plans, with wings are balsa sheet. The missiles can tant that the proper equipment is a plywood base. Drill holes in the base be made by modifying Estes Industries selected. The three motors draw con for (he J-Bolts and missile ignition wire. Astron Scout or Centuri Moonraker kits, siderable current, and more power and Vent holes should be punched or drilled but we used available, standard model a higher speed can be achieved by using at the rear of the hangar on the outboard rocket parts. two six-volt batteries connected in side only. The floor of the hangar is The plans illustrate the configuration parallel so as to retain the six-volt covered with a layer of asbestos gasket of both the scale Styx and the opera system. Two Portalac batteries will fit in material under a layer of heavy cooking tional Styx. In addition to the difference the hull if stood on end. However, in this aluminum foil (with the dull side down) in body shape due to the rocket tube, case, bulkhead “ E" must be cut open in as insulation against the heat of the the operational model has the wings order to fit the two batteries. missile blast. These can be held in place moved aft, and much larger fins also Our missile is ignited with a six-volt with small carpet tacks or thumb tacks. moved aft. This was necessary in order to circuit. Once the missile is loaded with This insulation should curve upward place the center of fin area as far behind the rocket engine, and the rocket en slightly against the back of the hangar. the center of gravity as possible. We also gine igniter wire inserted, the mini The launching rail is bent from 1/8- added from 3/8 to 3/4 ounces of lead alligator clips are gently attached to the inch diameter wire and installed before ballast in the nose cones of our missiles two ends of the igniter wire. Extreme the sheet aluminum hangar is mounted to move the center of gravity forward. care must be taken when the missile is on the base. The rail need not be music Although the flights are of very short placed on the rails and pushed into the wire . . . it can be any other wire which is duration and distance, the objective is hangar in order not to dislodge the clips more easily bent and adjusted. We to have a straight and level run without or wire. The system can be tested be found a clothes hanger made of soft. tumbling or erratic trajectory. Actually forehand by connecting the clips to a 1/8-inch wire, and bent our launcher rail this missile doesn’t "fly” in the sense of mini-bulb and activating the ignition from it. Brass rod can also be used for duplicating the Styx cruise missile which servo. When the bulb lights, the system this purpose. actually flies to its target. The model works, and is ready to go. Launch with The rails must be perfectly parallel and missile blasts out of its hangar at a very care and always be certain your missile carefully matched to the tubes on the low angle and therefore scribes a very will not endanger anyone’s safety. missile. We wrapped the rails with sheet low trajectory before striking the water brass, drilled a hole through the brass or land about 25 to 50 feet away depend OSA MISSILE BOAT and inserted a bolt and nut. This was ing on wind and speed of the boat. LIST OF MATERIALS used to hold the rails in adjustment. The aluminum tubing should be a very (AH material is balsa Once the rails fit the missile perfectly, thin-walled type, and the two rail riding unless noted otherwise) they are held to the base with J-bolts. tubes must be aligned with the rails (6) 1/8' X 3" X 36" for bulkheads, coam Recheck the rails and then prepare the before the cement has dried. All attach ing, hull covering, platforms, and deck aluminum hangar for the base. ments to the rocket should be reinforced houses; (1) 1/8" X 12" X 24" plywood for After bending the overlapping back with gauze, crinoline, or silk and cement. bulkheads, equipment mounts, keel, 76 MODEL BUILDER and skegs; (3) 3/16" x 3" x 36" for deck, missile wings and fins, gun turrets, gun director, and deckhouse front; (1) 1/16" X 3" X 12" for hatches, gun turrets, and scale hangar doors and stiffeners; (3) 8-1/2" X 14" sheets oak tag for scale hangars; (1) .020" x 12" x 12" sheet aluminum for operational hangar.motor MORE COLOR, straps, and smokestack; (1) .032" x 3" x 6" brass for rudders, steering arm tie-rod, and launching clamp; (1) 1/8" dia. x 24" Ig. brass rod for center propeller shaft, and missile launching rails; (2) 1/8" x 3/16" x 36" for chine strap; (1) 1/16" dia. X 18" Ig. brass rod for tiller/rudder post: (1) 1/8" inside dia. x 4" Ig. brass tubing for center prop shaft tube; (1) 1/8" O.D. X 6" Ig. brass tubing for tiller bearing; (1) 3/32" dia. x 2-1/2" brass rod for out board propeller shafts; (1) 3/32" inside dia. X 8" Ig. brass tubing for outboard propeller shaft tubes; (1) 1/32" dia. x 36" ig. music wire for whip antennae and tripod mast; (1) .046" dia. x 12" Ig. soft baling wire for wheelhouse rail,and gun director platform rail and braces. MISCELLANEOUS You will need screws, nuts, bolts, straight pins, wire nails, beadcraft wire or coil winding wire, assorted dowel, n f f P ' Z . s g S S ' tÄS» yellow or white decal for windows, white decal for boat number, sanding : . G^ e.\vie sealer, light gray dope, dark gray dope, . 0 0 % red dope, black dope, sandpaper, ^ aOO^ ráP * ^ - aV S ft ote^ ‘ cement, epoxy glue, wiring, mini-alliga tor clips, )-bolts, asbestos sheet, alumi num foil, propellers, deck fittings, e * ' ·***'. o w » ; motors, and at least one six-volt battery. Note the following equipment source »*&&* addresses for propellers. Aristo Craft, Mabuchi. and Portalac products: ρλ5°·. χ\β»$ Polks ModelCraft Hobbies 6 . * n W * ^ *U S ? '^ A \t\ ä 314 Fifth Ave. wyV'Q New York, NY 2-9*' - . i r i ď* * V ^ .W\\s9e c0pN). For brass rod, scale model fittings, brass tube and sheet: Model Shipways Co. Inc. 39 W. Fort Lee Rd. Bogota, N) 07603 Happy boating! · f » r . > '\\\e t°' $ » " s ~ SGa\e HOBBYPOXY PRODUCTS Citabria...... Continued from page 24 a division of P e ttit Paint Company Inc 50 Pine Street, Box 378 V’ the rear part of the center section, Rockaway, NJ 07866-0378 making sure that you have 1-1/2 inches of dihedral in each wing. Glue the dowel pegs in the predrilled holes of the front of the rear part of the center section. I provide extra strength. Cutting hinge the No. 5s. then add a three-inch piece of one- slots in the basswood is more difficult, Covering is conventional with your quarter-inch dowel between the spars but it is worth the extra effort. choice of coverings. Silk would be more on each wing as a dihedral brace. FINAL ASSEMBLY appropriate with a vintage model. The Lightly sand the entire wing, center it The entire fuselage, wings, and tail two pieces glued between the No. 5s will over the fuselage, and drill the holes for surfaces should be sanded lightly and allow the entire bottom to be covered. the nylon wing bolts which will go vacuumed to remove any dust. Cut all After covering, glue the tailpieces to through the trailing edge. Glue a small slots for the hinges and exits for the the fuselage, install the hinges and bell- piece of plywood to the trailing edge to pushrods. You may either tap the hard cranks, and install the motor and radio. prevent the bolts from going through it wood block for the nylon wing bolts, or The radio compartment is large enough when tightened down. If you plan to use use a T-nuts on the underside of the to accept almost any radio and your ailerons, cut them out at this time, install block. choice of throttles or off/on switches. I the torque rods, and mark and cut the Mounting the landing gear is some use the high/off/low switch which I hinge locations. what tricky as the formed aluminum described in the construction article for TAIL ASSEMBLIES gear must be slid under the bottom the Pleaser (see the May 1983 Model Tail construction is quite simple. Glue longerons and bolted to the plywood Builder). the appropriate balsa or basswood over mount. I then glue a piece of 1/4-inch FLYING the plans, remove, and sand. I use square between the No. 5s just where The first hand-launch was almost a basswood for the spar in the stabilizer to the gear exits. Sand these to the shape of picture perfect flight. The flying speed OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ‘EM MODEL BUILDER SENT YOU! 77 15-5 and the fuel was five percent nitro. After about two minutes of mildly-rich running, the engine tacked 9500 without a muffler and without being leaned to its very peak. The idle, with no adjustments EPOXY RESIN CONTINUOUS FILAMENT to the factory settings, was 3000 rpm. • 526*4.8x3.7*3. · 10*8.10*7.ΙΙχ β · · GIANT SIZES Later, when the muffler was installed, 7x4.7*65 $4.95 3»LADE $14.95 I8X8.I8XI0 $34.96 there was a 350 rpm power loss. LEFT or NIGHT HAND. • 8x4.8*8 8x8 · 12.5*8 Mituwy 20X8.20X10 $38.95 Guys, as you’ve very probably sum- 9*4 9*8.9*7 $7.96 4 BLADE $24.95 22X8.22X10 $49.95 mized, I really like this engine. So much VONTEX TIPS AVAIL • 10*4.10*8.10*8. · PITCH GAUGE · l/? x ,nd gi«n· sires so that I intend to put it together with an 2 to 3 WEEK DELIVERY 11*8.11*7.12*4, up to 12In. $29.95 $tr»iflhi lipand R/C biplane. Would you believe a Big 12*8 $9.96 r*Qhl hand only John? That’s for the future. For here, OMl«ra Invited there are several accompanying photo The 1*303-409-3928 for M.C./VtSAACOO graphs that show some very nice aspects PROP or moll Coth,Check of M.O. to of the engine. 10· Emerald St. •roomfleld.Co. 80020 Overall, if four-cycle engines intrigue you, I suggest you give this one a lot of consideration. Take care... finish will set the tissue. Don’t worry ENGINE SPECIFICATIONS about less than taut covering. It is Bore ...... 29.0 mm SCALE! Stroke...... 22.6 mm Adjustments were a trial, to say the Weight ...... 795 grams least, but the movable surface helped C ylinder...... Steel greatly. As the original incidence angles Piston ...... Aluminum with ring proved extremely critical, and impos Horsepower ...... 1.2 at 11,500 rpm sible to work with, use the angles shown Aircraft weight ...... 3.5 to 6.5 kg · on the plan. A bit of left aileron made Model No. 2 a very stable flying machine. Weight is 14 grams, and with a 26-inch Indoor...... Continued from page 55 loop if 1/8-inch rubber and a six-inch plastic prop, the White canard has done 38 seconds in dead evening air. The were mostly solid and heavy. potential is there for better times yet. Now things are considerably different. Oh, about that tiny fin located just Balsa wheel blanks are available from behind the canard wing, it was not glued many sources. New materials, such as: in place. Instead it was held in place by a beadboard foam and other plastics are force-fit between the crosspieces. Prior now widely used. The Dremel hobby to flight, it was slid to the right to clear tool is being employed to spin wood and the rubber motor. What effect does this plastic wheels. was very scale-like. The 11-6 prop pulled have on flight? None. In fact, there were Perhaps the most significant new her up very well. I climbed out to a no detectable changes in flight when the product on the scale wheel scene is the sufficiently safe altitude and made the fin was removed! Hungerford spoked wheel. Since Fulton first turn. (I fly with the rudder/aileron If the White appeals to you, build the Hungerford began making and selling coupled.) After about two minutes, I had fuselage as strong as possible. Pre-glue, wheels, many modelers have enjoyed enough altitude to switch to the low glue, and reglue, and use hardwood building those early flying machines that speed and enjoyed a very relaxed flight. longerons. The wing has sufficient area catch the judges eye at awards time. At The low speed was perhaps a little too to support strong construction. the outset, these wire beauties sold for low as she did begin a slow descent. I You will enjoy this canard, an old about $6.00 per set. They were well then switched back to high and climbed concept which keeps backing its way worth the money. The price is now over up again. into the present . . . and the future. $8.00 . . . still worth the price . . . if you I get consistent seven to nine-minute have the money. However, sometimes flights using the Leisure geared motor SOURCES MENTIONED IN TEXT the hobby shop doesn’t have the style with six cells of 1.2 ah capacity. If one F. Hungerford Wheels and diameter you need for a particular wants a little more power without the 1770 Lilac Circle airplane, and you have no choice but to hi/low features, seven cells would give Titusville, FL 32780 build your own. Some builders prefer to more altitude. construct their own spoked wheels. After disconnecting the rudder/ William Bros. Some folks (like youngsters) can’t afford aileron couple, the Citabria will perform Dept, MB to buy, so they build their own out of slow rolls. The glide is very gentle, and 181 Pawnee St. necessity. with a little planning, plus the use of low San Marcos, CA 92069 · Solid scale wheels can be turned power, she will drift in for a very smooth down on the Dremel, or simply cut and landing right at your feet. · sanded to shape. In this case, a plastic Fuel Lines... Continued from page 10 circle guide (from your local art supply store) is used to trace an accurate circle White...... Continued from page 49 things could be commendable. To com outline on the foam or balsa to be cut. pensate, the mind might even suggest, Then the excess material is cut away accomplished with patience, fortitude, "It’ll probably be a lousy runner.” It outside the outline and the circle shape and temporary uprights, which hold the wasn’t. The literature suggested that a is sanded to finality. The disc’s corners axle in place while the angled pieces are good half-an-hour of running might be are then sanded and contoured to fitted and glued. The axle is then trim necessary before smooth operation shape. med, and the temporary uprights are could be obtained, and maybe two Spoke wheels can be built on a simple removed. hours of operation would be necessary jig. The circle outlines are drawn on 1/16 Both sides of the wings are covered in for premium performance. Maybe so, sheet balsa (several cross-grain lamina white or "antique” tissue, and are not but I thought that it ran remarkably well tions) and the tire is cut out and sanded shrunk. A spray coat of Deft clear wood on the first tank. The prop was a Rev-Up to shape. The same outlines are scribed 78 MODEL BUILDER onto a square sheet of 3/8 balsa for the construction jig. The spoke positions are ASTRO CHALLENGER COBALT MOTORS drawn onto the jig surface (see sketch). Red for one side and blue for the other. SUPER POWER FOR WORLD CLASS COMPETITION Small flat blocks are positioned on the We built our first cobalt motor in 1975 for out SOLAR-powered jig to elevate the tire slightly so that the unmanned airplane SUNRISE. The SUNRISE motor weighed 16 hub will protrude from either side when ounces and produced 3/4 HP Last year we built trie SOLAR viewed from the front. The spoke mate PROPULSION SYSTEM FOR THE DUPONT SOLAR CHAL LENGER that made its histone flig ht fro m Pomtoise. France, to rial can be thin strips of round bamboo Mansion England, on July 7 1981 The SOLAR CHALLENGER or basswood (from the hobbyshop). For CO BALT MOTOR was o nly three inches m diam eter but ultralite indoor wheels, I recommend delivered alm ost 3 H P " B y using this advanced technology using the stems from straw flowers we b rin g you Our new ASTRO CHALLENGER C O BALT MOTORS, super-perform ance m otors for the serious (usually found at the florist shop or local com petitor, for the modeler w ho dem ands the best and department store). The spokes are simply won't settle for second best The heart of these cemented at the hub position and then m otors is the new. high-energy, rare-earth COBALT trimmed and glued at the inside center magnets They supply much higher magnetic flux and are edge of the rim. The hub must bedrilled not damaged by overloading To efficiently utilize this magnetic potential we have incorporated ( 1) a high-grade Challenger 05 . . S75.00 and positioned over a wire spindle silicon steel armature lamination. (2) a high-performance which is embedded vertically into the jig commutator capable of running at 3S.000 RPM and 350“ F and Challenger 15. , $100.00 center. The wheel is cemented to the (3) a new silver graphite cartridge brush that can safely Challenger 25. . $125.00 commutate 25 amperes The net result is a really super power four blocks before the spokes are fitted motor that is ready tor world class competition THE NEW Challenger 4 0 .. $150.00 in position. The spokes are set in on one ASTRO CHALLENGER COBALT MOTORS - NOTHING ELSE Available now, see your dealer COMES CLOSE!· side, and the wheel is cut away from the or order direct. blocks and turned over. The remaining Send stamped self addressed LARRY JOLLY SETS ELECTRIC SPEED spokes are affixed after recementing the RECORD OF 9Z85 MPH (2-WAY AVERAGE) enveloPe for specifications to: wheel to the blocks. After again releas ing the wheel from the blocks, it is then • . ^ h ead^ . c o s bu ^ etc° t5 ta on d a s t r o flig h t inc. fine sanded and painted black, with the FAI CONFIRMATION. 13311 BEACH AVENUE VENICE. CA 90291 spokes being painted silver. NEW SCALE REFERENCE BOOK bracing wires. Even in most modern A new source book for scale builders planes, such as: the Piper Cub, Wacos, " π » » is coming off the presses very soon. Taylorcraft, etc. The tail surfaces were Your first add FREE with sub Included in the book are a dozen three- supported in this manner. scription to the D& L Trading view drawings of aircraft suitable for Many builders of scale models use scale modeling, including obscure sewing thread for this task. This is not Post. Not only dealing with monoplanes, a golden age racer, a ideal, because the fine hairs that stick model airplanes but trains too. biplane, a triplane, and two canards. out of sewing thread increase the drag If you have equipment to sell Also featured are three different Farman on the airplane greatly. The smarter or trade or if you have been Mosquitoes and an Autogiro. modelers use silk thread. Recently, my looking for a particular item I his new work is 8-1/2 x 11 and has Gossamer Albatross, nine-inch fuselage. and unable to locate it; why not over 60 photos in its 56 pages. The Peanut scale model was stored in my special prepublication price is now garage. Even though it was inside a submit your FREE ad and sub $6.95, while the regular price will be cardboard box, the heat and moisture scribe now. (40 words max., B&W $8.95. Write to W.C. Hannan, Graphics, acted on the silk thread rigging and Photo $3.00 extra) Subscript P.O. Box A, Escondido, CA 92025, USA. warped the model substantially. The ion: $ 13/y r. (10 issues per year) Yes, the author is our own Bill Hannan! entire model had to be restrung and D&L TRADING POST BRACING MATERIALS stored elsewhere. If you are contemplating getting into I recommend Danville’s Fly Tying P.O. Box 7710 indoor duration flying, you must con Thread, available at selected fishing Oregon, Ohio 43616 sider how the surfaces are braced. equipment stores. Monofilament clear Super-lightweight models must be sup plastic thread is sometimes substituted, ZT,------FREE ported by thin wires or other materials. but it does not have a scale-like The wing and tail structures must be appearance. held in position in flight. To log long A MASSIVE CONCERN R/C Autos. . . . Continued from page 41 flights, the wood must be light and A closing thought might be about delicate. The bracing wires hold the weight in indoor models. It is far better Even though I have never cared for or model together and insure straight, to try to remove weight to balance your had satisfactory luck with ball bearing warp-free surfaces. model than just to add clay to the nose. clutches, we decided to give it a try with The standard material used in dura Consider relocating the wing to shift the an Associated 13-tooth vented clutch tion models is Nichrome wire. This center of gravity if the model does not bell. Associated’s teflon clutch shoes, means nickel-chromium steel which is balance at the appropriate point. It and a set of ball bearings, also a stock drawn down to an incredible .001 in. doesn’t make sense to take all those Associated part. Before the engine even diameter (the average human hair mea pains to build the model light, then started, just the bumping from the sures .004). This wire is also available in stick a big glob of clay under the nose to electric starter was enough for the outer an even smaller size. However, this .0005 balance it. Plan where you want the bearing to shed a wire retainer, followed in. wire curls very tightly when removed center of balance to be, as you are closely be a seal. We did run the car that from the spool and is hard to work with, constructing it. Keep the tail very light, day, but later in the evening when John not to mention hard to see. The covered even if it means moving the rear peg pulled the bell off, bits of bearing wing is cemented to a jig and then strung forward a little. As Jim Jones says, “ Keep tumbled out. Assuming this would be a with the Nichrome wire. Completing your WEIGHTS DOWN, and your TIMES recurring problem, we switched. MRP this delicate task is essential to a superior UP!” . Believe me, they go together! supplied a 12-tooth bell, a new union duration model. Write those questions and comments nut and a needle bearing assembnly for Scale type models are also seen with to Ken Johnson, 16052Tulsa St.,Granada the bell. The smaller bell gave us the braced surfaces. In many instances, the Hills, CA 91344. Send me a picture of lower gearing we wanted anyway, and airplane being modeled had flying your club members. I especially want to the needle bearings are pretty reliable. wires. Most every early aircraft de print pics of those youngsters in the You do have to lube them prior to each pended greatly on the support given by column. See you-all next time! · race day with MRP’s Solution Lube, and OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 79 Can you really afford to use less ** H o b b y orn than the best battery packs made? rn ^ C f', Wing 5 p a n --7 8 )“ Wing Area -561 Sq“ SR aerospace grade battery packs give you • 3 Times the Hying time • The ulimate in reliability • 80 Packs to choose from »or The SENSOAR glider transmitters, receivers, and A HOBBY HORN E x clu sive·! A HOBBY HORN K it! electric powered cars and planes The SENSOAR Glider kit is a high quality kit with Machine cut & sanded parts. Select quality balsa • Send a self-addressed, stamped and spruce. Detailed plans, and written instructions. business size envelope for full For THERMAL o r SLOPE o r 05 ELECTRIC POWER. details VALUE PRICED at $16.00 B A T T E c u e s 80 MODEL BUILDER deteriorated? And if possible, if you have systems available to you on the adjacent chan nels, make a check for interference before any of you fly. Don’t assume that just because your radio was clean on the original frequency, it will still be so after you’ve jumped clear across the band. SWINGEE ' I am sure in time, all of these small problems will be ironed out and tech A New Concept For Model Builders nology will come to our rescue. After all, there was a time when we all flew on 27.255, and look where we are today. In the meantime, let’s not eat each other’s airplanes up unnecessarily. A 12-VOLT BATTERY FOR EVERYTHING No doubt about it, that 12-volt “ starter” battery that most of us lug In-line control device has built-in for sample, technical information around has gotten to be a prime piece of bellcrank, controlhorn and hinge. and price list. Include $3.50 for ground support equipment. Originally Made o f D elrin — the space age postage and handling. intended to turn over a starter motor for material that is impervious to tempera Wholesalers/dealers welcome! a second or two, we now ask it to pump ture changes and age brittling. The testing period is over ... the For more information see your local our fuel, light our glow plug, charge our SWINGEE is now available for you' radios, etc., etc., and now the poor old hobby shop or write direct to ScanAm things have come to the point where they can't always hack it through a long day of flying, and certainly not for a scan am INTIBNAIKXAi TRADING MCOfiFORAIfO weekend of hot competition activity. 1000 Quail, Suite 290, Newport Beach. CA 92660 · 714/833-9098 I have found one with a little bit more spark, but don’t let my poor puns drive Santa Ana, CA 92704. (714) 540-6155, for you away from it, as it does have a lot of the name of the nearest supplier. The the features we active fliers have been battery is priced at around $32... but we looking for in a 12-volt battery. To start are worth it! with, it is an eight-amp unit, enough to The Elpower EP1280 would also be a Í ΓΙj u i Y last all weekend no matter how hard to perfect power source for electrics, start your engines are, and that added which mostly depend on 12-volters to capacity means that your starter is charge drive batteries. As such, it will be actually working with a higher voltage as a perfect companion for the... PfcANUl SCAl> the voltage drop under heavy loads will NIEUPORT 11 FLYING MOC* I THE DELTA MFG. BC824 not be as much. It is a sealed, mainte PEAK DETECTOR CHARGER COMPLETE BALSA AIRFRAME OF PKE- nance free battery which you won’t have ASSEMBLED FUSELAGE WINGS S STRUTS to remember to check or add water to, A couple of months ago, in answer to a INCLUDES DUMMY ENGINE. PROPELLER query from a reader, I commented that WHEELS. AND TISSUE COVER AND FLY' and which you can install and carry in any conceivable position you care to. It the development and manufacture of S67 50 +S2.00 US Delivery more sophisticated battery chargers Calif Residents Add 6% is unbreakable under normal use, and is than the simple transformer/diode 30 Pr. Booklet S2.00 claimed to be capable of 1000 charge overnight charger we all use had not cycles when properly cared for. NOWLEN AERO _ It is the Elpower Solid-Gel EP1280.8.2 come to pass not because the technology 139 BOARDWALK B GREENBRAECA 94904 pounds in weight, and its dimensions are was not available, but that the cost would be prohibitive. I was only partly 8.38 inches long by 2.75 inches wide by 5.5 inches high. I have used this battery right ... I do know of a couple of such trickle charge. singly, and in a pair to power a Sullivan projects that were cancelled when it E. Charging continues at a trickle rate 24-volt starter for my larger engines, and became obvious that the selling price of until you disconnect the battery. have found it to be a dependable source the unit when completed would lead to The Delta BC824 charger comes in a of adequate power at all times. a very small quantity of sales. However, relatively small package, only 4 x 1.5 x such a unit has become available, at a I don’t know of any normal model 4-1/4 inches, including that device on price that is acceptable; I’ve just had the equipment supplier for this battery, top, which is a heat sink for a power opportunity to inspect and test a Delta though they are readily available transistor. Is it designed to charge four to Mfg. DC824 NiCd battery charger which through electronics houses. If you are in six 250 or 500 mah batteries at one amp in it calls a “ Peak Detector Charger." a large city, try the Yellow Pages for 15 to 30 minutes, or four to six 1200 mah The gospel according to Delta tells us batteries in 20 to 30 minutes when Electronics and Batteries, or check with that the voltage of a NiCd battery under powered by a 12-volt battery. It will also one of the following: charge will rise in a series of steps, as per fast charge a seven-cell battery when El Com, Inc. the enclosed graph; the percentages powered by an AC battery charger 13854 Bently Place shown are approximate. During the capable of four to six-amp output. After Cerritos, CA 90701 different periods, the following action fast charge is completed, the rate auto (213) 404-2961 takes place: matically drops down to trickle. More Telecommunications Devices A. The battery voltage will rise quite about the latter two remarks later. 2320 Wisconsin rapidly for the first minute. My tests of the unit revealed that it Downers Grove, IL 60615 B. The battery voltage will rise very does everything it is claimed to do. I (312) 971-3460 slowly for the next several minutes. especially liked the built-in safety fea C. The battery voltage will start to rise tures, and the fact that it is a pulse A-1 Alarms very rapidly again. charger. This means that the batteries 8921 Northern Blvd. D. The battery voltage will start to will not heat internally as much as they Jackson Heights, Ml 11372 level off, and at the end of the period, it would under a steady, heavy current, and If worse comes to worse, check direct will start to drop at which time the peak the system conserves input power. Fol ly with Elpower Corp., 2117 S. Anne St., detector switches the charge rate to lowing the instructions, which are com- OCTOBER 1983 WHEN CONTACTING ADVERTISERS. TELL ‘EM MODEL BUILDER SENT YOU! 81 vels of the new Boeing 757-767 wide BC824 PEAK DETECTOR CHARGER Get yours today at your local bodied airliner. Generally referred to as hobby shop or DEL TA dealer. being computer-controlled (and what The best way to charge Direct orders accepted. isn’t anymore), it is really referred to as your four, six, or seven having an automatic flight control sys cell electric power packs! tem (AFC) which does just about every Use w ith : 250, 45 0, 550 mab $75 thing (from monitoring the engines to cells, or sub*C cells (1.2 ah). navigating) while blissfully flying the plane. The AFC probably makes the 757- 767 wide-bodies as popular with the airline pilots as the Mercury capsules must have been to the early astronauts who had to watch the first astronaut.. . a monkey . . . go into space and test out their equipment for them. As an electronic achievement, no 27 RACECAR COURT body can dispute its advances and level LORIMOR. IA 50149 of technology, regardless of what a DELTA M fg . pilot’s personal feelings might be. And right in the middle of all those switches, heavy load is applied to a battery, the lights, and clocks in the cockpit, is voltage will drop. Just how much de something called a mode control panel pends on the capacity and type of (MCP), which in an older airplane is b battery and exactly what the load cur simply the automatic pilot. And in the w rent is. I don’t doubt that when used middle of that, for making course and $33.98 A B SPACER with a motorcycle type, wet cell, 4.5- altitude changes while under automatic amp battery, the voltage drop is too pilot, you'll find not a two-axis gimbal, NOSTALGIA high, thus the available voltage too low, but two separate controls. One is a Ä / G A S M O D E L knob, for bank and heading corrections, FROM THE 5O's for proper seven-cell charging. Ob viously, what is needed is a better and the other is a vertical control * voltage source. My tests with the El- marked “ DN” and "UP” for altitude M A N U F A C T U R E R S OF power EP1280 battery previously men changes; just like in Mode I R/C flying. \ RUBBER, GLIDER. AND tioned proved this to be so. When So you can relax . .. the next time you i I GAS FREE FLIGHT KITS connected to a freshly charged EP1280, have the opportunity to fly in a 767, do so V (/y j DISTRIBUTOR AND at "trickle” , the measured battery volt secure in the knowledge that you are V o ,. DEALER INQUIRIES age was 12.87. At one amp, it dropped going there with a Mode I robot in X ^ r o t A j i x INVITED. down to 12.64, and to only 12.3 at the P O B O X 5996 control, and try not to remember that it three-amp rate . . . all with seven cellson was all built by the lowest bidder! LAKE WORTH for catalog FL. 334 61 the business end of the BC 824. Though I It's all in fun . . . the important thing is didn't try it, I would imagine that a full- not how or what we fly, but that we do size automotive battery would also do so, and are able to share the hobby with plete (including information about the the job, but who wants all that acid and so many wonderful friends. · choice of batteries and cell equalizing), I weight around, these two items seem charged a number of test packs, which made for each other. all discharged very closelytothecapacity The BC824 Peak Detector Charger is Winch...... Continued from page 23 obtained from them during normal manufactured by Delta Mfg., 27 Racecar overnight charging. I like the charger, Ct., Lorimor, IA 50149, (515) 763-2220. Its elevated above the main frame of the and it nas become a permanent part of price is $75. winch. What you’re seeing is a three- my support equipment. piece, Mexican pyramid-shaped, frame There are two points which I must MODE I . . . R.I.P. extension made of steel “ angle iron” (as mention, one a correction, and one an I wasn’t going to say another thing is the rest of the frame). This extension addition to Delta’s information. One is about the wonders of Mode I flying. raises the shaft of the take-up drum their use of the word "trickle” , which in After all. those of us who use it are aware 4-1/2 inches above the frame. Because it electric R/C car parlance has apparently of its superiority, and we are perfectly is higher than the rest of the frame, the come to mean any charge rate less than willing to allow others their opinion. line is kept off the ground for a longer "punch it!" In actuality, the battery However, I ran into something that is too distance (which saves a little bit of line industry has established different charge good not to share with you, and after wear), and it allows for a neat, foot pedal rates, they describe "trickle" as between that I promise we’ll let the subject rest. style, friction brake to be placed under .04 and .01 percent of the battery One of the reasons Mode II fliers the spool. (More about that later.) capacity. This rate is normally applied to always give you for preferring that The take-up spool is mounted on a an unused battery, such as those used in method of controlling pitch and roll 5/8-inch, oil-tempered, drill rod shaft, alarm systems, merely to keep it from with a single stick is that "that is the way and is secured by two alien key set self discharging. The next higher rate, real airplanes are flown.” Disregarding, screws (one on each side of the spool). which most R/C system chargers work or forgetting, the fact that except for That hefty shaft is supported by a phos at, the .1 rate, is called a "Slow,” or military fighters and aerobatic airplanes, phor-bronze plain bearing (or bushing) "Overnight” rate. For most R/C system all civil and airline aircraft are flown with on each end. The bushings are mounted batteries, this rate is 50 ma.and this is the a wheel and yoke. in self-centering "pillow blocks” and are rate that the Delta charger drops to after I don’t agree with that term “ real" basically foolproof to remove and re having completed its fast charge cycle. airplanes either, my models are real, place. There is a small, hinged, spring Just for review, the other two estab some of them for how much they cost, if loaded, metal cap on the top of each lished rates are "Quick,” or “ Rapid,” at for no other reason. But we’re not about pillow block which covers the oiling .3 to .2 percent, and “ Fast” at one to 10 to start another controversy. point for each bushing. According to times capacity. Anyway, back to the subject at hand: Ted Davey, president of Davey Systems The other point which I wish to “ That is the way they fly real airplanes.” Corp., the phosphor-bronze bushings mention is the necessity for an AC The February and March issues of Radio- seldom (if ever) need oil. When they powered supply when charging seven Electronics magazine has a most inter do need it, they will “ chirp” a little, cell batteries. To clarify this, when a esting article about the electronic mar which is easily remedied by two or three 82 MODEL BUILDER T H E new POW'RTOW W IN C H ! Power lor any size sailplane · low current RETRIEVER MORE ZIP & LONGER BATTERY LIFE draw · anti-kiting & manual drum brakes •adjustable speed· parachute · turn-a ro u n d · fo o l sw itch · 115 lb. braided line — and use it with the b e t b i i v e b f o r : launch-a-minute fIights · an end to line shagging delays and line crossings · drag tree operation without tangles· heavy-duty cables and clips «braided 30 lb. line · tow ribbon «hand switch· line guides and ball bearing swivels ■ k M l i l OAVCY I ■ n SYSTEMS MW I B n · CORPORATION $ 300°-O ONI WOOD LANE,MALVERN, PA. 193S3 (213)644-0692 plus shipping Write or call tor more inlormation plus shipping drops of a light machine oil (like 3-in-1 drain for Ford starter motor), 12-volt Oil). motor that was just perfect for what he The foot brake I mentioned above is a wanted. It was a readily available, in l 7] QUIET! LIGHT! simple device made up of a V-belt dustrial motor that was (and is) used in pulley, a braided rope, a foot pedal, and electric carts for transporting people a return spring. Its operation is also from one end of large industrial com simple: to stop the drum from spinning, plexes to the other. You’ve seen them, step on the pedal. This causes the rope I’m sure, they’re like small golf carts. to tighten against the pulley and there This motor's low current drain would fore create the friction necessary to stop allow extended use of the winch and/or the drum. Why do you want such a Retriever. In practice, on a launch-a- brake, you ask? If you are using the minute basis, a normal auto battery (12v) Retriever without it you’ll find out why. lasts for three hours .. . that’s a lot of The Retriever pulls the line back so fast launches and retrievals! V L-1 02 that when you get near the end of the The price you pay for all of these retrieve, the line is flying off that winch launches is a small one. The power that ELECTRIC drum fast enough to "bird's nest” on the Pow’rtow winch puts out is about on PROPULSION you if you don’t brake it. You could use par with a standard, direct drive, six-volt SYSTEM Send your shoe’s sole to brake the drum, but starter motor winch with a six-volt 50C lor this is much more effective . .. and battery . . . a good six-volt winch, mind complete illustrated civilized! you, but it doesn’t quite have the power CATALOG FAST One last item before we move on of a 12-volt starter motor with a 12-volt CHARGE from the winch drum area .. . and that is battery. The bottom line difference is CONSISTENT the drive pulley. The drive pulley is that with the Pow’rtow, you end up PERFORMANCE another V-belt type pulley of 2-1/2-inch "pulsing” the motor less (in some cases, diameter. It is secured to the shaft by an not at all) with the average R/C glider. Now, for all you F3B guys out there who QUIET OPERATION - perm its flying m ost anywhere- Allen head set screw. During the course city parks, front yards, etc of the testing, no slippage was noticed. are looking to approach Earth's escape The winch drum is driven by a V-belt velocity during your zoom tow, this LIGHT WEIGHT - 2Vz Oz - but powerful enough for from the winch motor’s pulley. This winch probably isn’t for you (although it models weighing up to 10 oz pulley is secured to the motor shaft by could be modified, I suppose, by going INSTANT STARTING - no priming, no continuous an Allen head set screw and a metal tang to a different motor/pulley arrange flipping of prop to stan which fits into a slot on both the motor ment). However, for the Sunday flier MORE EFFICIENT - lower rpm - lower running cost shaft and the pulley. This wholearrange- who wants to have fun with his Wan CLEANER - no fuel to mess up your plane. ment is secured further by a nut which derer, Paragon, Sailaire, or Sagitta X-C, screws onto the threaded end of the without fear of accidentally ripping his motor’s shaft. This pulley isn’t going wings off at the top of the tow, and for PRODUCTS 1 7Θ71 ALABAMA AVEMUE · »16 anywhere! the club looking for the most launches CAMOGA PARK . CALIF 91304 THE MOTOR per winch dollar (and retrievals too!), Ah yes, the motor! This is the part the Pow'rtow will fill the bill nicely. Yes, four pulleys (the two pulleys which which makes or breaks a good winch the winch/retriever combo is great as a come already mounted in place are design. Fortunately for Davey Systems club winch because you can get a lot of 2-1/2-inch). As the total power available Corp., this one “ makes” his winch. sailplanes in the air in a very short time, from the winch is not variable, the The Pow'rtow winch is actually Davey and nobody has to “ go pull winch pulleys can only allow you to tailor that Systems’ second winch design. It was lines!” You really can’t appreciate the power to match different sailplanes preceded by the Pow’rwinch which ease of flying with both the Retriever and/or wind conditions. For example: used the same motor as the Fab-Tek and Pow’rtow, launch after effortless the wind is blowing a steady five mph winch currently uses, as well as DSC’s launch, hour after hour, until you’ve and the turnaround is directly upwind, own Retriever. It had enough power to tried it. It’s like having three winches in vou are flying your "gas-bag floater” launch small to medium-sized sail one. with a pound or two of lead, and you planes, but was inadequate to launch A very nice feature of the Pow'rtow realize that with this wind, line speed the larger, cross-country type sail winch system is the variable speed/ becomes less important than torque, or planes. So, the search was on for a torque capability. The Pow'rtow comes the ability to pull strongly (if need be) stronger motor. with two extra V-belt pulleys, one two- against the wind without bogging down What Ted Davey found was a large inch and one three-inch. With these two the winch (that increases current draw (7-1/2 in. long by 4-1/2 in. diameter), extra pulleys you have a choice of line you see, which isn’t good). So what do simple (only one wire hook-up), low speed or tension. Actually, you have you do? You switch the pulleys around current drain (75 amp vs. 220 amp peak seven possible combinations with the so that a smaller one is on the motor than OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL’ EM MODEL BUILDER SENT YOU! 83 better. In the course of testing the DALOTEL - TIPORARE - C.A.P.21 Pow'rtow on the Gorilla’s home field, the aluminum switch became jammed with the fine, powdery soil of this particular field, and got stuck in the on position while Mike Reagan was launch ing a Gentle Lady. (This has never happened with the brass switches.) By the time Mike realized what was hap pening, he started yelling for someone to stop the winch for him while he gave ” down stick” totheairplane. Not under standing what was causing the winch to continue launching once Mike’s foot was removed from the switch, I did the first thing that came to my mind: yank BUILT TO ORDER S 5269 LUCKY CLOVER LANE off the foot switch wires from the WRITE OR CALL J MURRAY, UTAH 84107 solenoid. That stopped the winch and FOR INFORMATION PHONE (801) 261-1402 saved the Gentle Lady, but pulled the wires out of the solderless, crimp con enough line speed to give my Coat Hill nectors. Special two-meter a moderate zoom. This switch was actually the second Between the motor and the battery switch that was sent to me for the "FLEX-OFF" lies the automotive type solenoid switch. product test. The first switch had a dead FLEXIBLE METAL EXHAUST TUBING This is completely normal in every spot (electrically) when you stepped respect as everyone uses them in sail down all the way. If the Pow’rtow has • LIGHT WEIGHT GALVANIZED STUL plane winches as far as I know. You will one flaw, I would say that it is the foot ■ EASILY DENT, WILL HOU> IP'S SHAPE notice that there is only one heavy ■ FUEL PROOF-NOT EFFECTED RY HOT 3 } switch. (According to Ted Davey, EXHAUST OR HOT FUELS gauge power line running to the motor. nobody else has reported any problems ■ WORN DRIVE CLAHF INCLUDEO This puts to rest any comments about it with these switches . . . perhaps these •WEIGHS ONLY SLIGHTLY HORE THAN RUDDER OR PLASTIC TURING y V W actually being a generator instead of a two were flukes?) bonafide electric motor. The solenoid As you can see by the photos, the has a label on it telling you where to battery sits on top of the frame behind -SIZES TO FIT HOST MUFFLERS* install the foot switch wires; it is really No. I04F0 1/2» d la .x 12» 5.75 the solenoid. Under normal conditions, No. I07F0 5/8» d la .x 12» 6.00 simple folks. Also, the battery and motor No. I08F0 J / V d la .x 12» 6.25 the combined weights of the winch, No. I09F0 7/8» d la .x 12» 6.50 are both grounded to the frame; the motor, and battery are sufficient to keep negative battery lead uses the solenoid the whole unit from sliding around TATONE PRODUCTS CORP. mounting bolt to ground it to the frame, 1209 Geneva Ave. San Francisco. Ca.94112 while launching. It’s nice not to have to 415-334-7189 this is done at the factory as are all of the use stakes to anchor things down. The other wiring connections with the ex winch (without battery) and motor is on the drum. As the pulley on the ception of the foot pedal switch. The weigh 41 pounds by my bathroom scale. motor is easiest to change, you remove battery cables are ready to hook up to This is not too heavy to carry across the the 2-1/2-inch pulley from the motor the battery . . . all just as neat and easy as flying field, but it isn’t exactly fun. so and put on the two-incher. If the wind you could want it to be. bring something with wheels, like your gets stronger, put the three-incher on The foot pedal switch isa Borg Warner, kid’s red wagon or the trash can dolly, the drum and have at it, you’ll have the heavy duty, pushbutton starter switch. and don't sweat it! torque you need for a good launch. The foot pedal switch is a Borg Warner, The last thing that I want to call your Conversely, if the wind isn't blowing and heavy duty, pushbutton starter switch. attention to is the mounting plate for the line speed becomes more important to Unlike some commercial winches which motor. It was observed by quite a few you than pure grunt, put a larger pulley, come with micro switches, the Pow’rtow glider guiders to flex under the load of the three-incher, on the motor and comes with a switch designed to work launching. I don't know if this has any leave the 2-1/2-incher on the drum. with a solenoid, and one that is capable detrimental effect on the launch of the This last configuration worked out the of handling the current load placed on it sailplanes, / really doubt that it did, but if best for us as it allowed enough torque indefinitely. The infamous Gorilla winch you were to hold on to the winch line to launch a 12-foot, foam core winged of the SFVSF uses a similar pushbutton and stall-test the motor, you could see cross-country ship (fiberglass fuselage, switch that is made of brass, not chrome about 1/8-inch of flex in the back of the spoiler system, et al) in a light breeze (2-4 plated aluminum. In all honesty, how plate as the line tension built up, and mph) with no problem at all, yet had ever, the brass pushbutton switch is soon after that the belt slipped on the motor’s pulley. I must say here that at no . c , Λ λ Way to maintain nicads time during launch testing did this slipping occur, so I don’t think it’s important. (This flexing has since been «>>” .·* < jp ONLY *19“ eliminated by the manufacturer through the addition of a stiffener.) Oops, here’s another “ one last thing.’’ SIMPLE CYCLER The Pow’rtow has an anti-kiting brake Why pay for another charger when you already own one? Cycle your Rx. and Tx. feature. If you look at the photos, you packs the easy way throughout the year. The SIMPLE CYCLER gives you an audible will find this little goodie right in front of warning when your packs are discharged to the level recommended by the manu the winch drum. It works by resting facturer. Then safely recharge with your radio system's charger. You can easily against the side plate of the drum when determine the percentage of power consumed and that remaining in your pack. the line is coming into the drum, and Simple, safe, cheap. Connectors not included. «RED 22 then jamming tight against the side plate • See your local hobby shop · All products made in U.S.A. if the line starts going back out. I must _ _ _ · Send a S.A.S.E. for full information. admit that this device wasn't used by ^ R a l T I 4736 N. Milwaukee Ave. — Chicago, IL 60630 anybody, and is only there in case you IF UNAVAILABLE LOCALLY, ADD S1.00 FOR DIRECT ORDER. NO C.O.D. happen to be using it in a contest that requires such a brake (like F3B), or you 84 MODEL BUILDER FRANCIS SMITH’S SHIP YARD BO X 118 N O R W O O D . P A . 19074 (AS FEATURED IN MODEL BUILDER MAGAZINE) 9 5 ' PATROL BOAT 85’ HARBOR TUG 48" LONG 10.5" BEAM Price $250.00 36" LONG 10.5*' BEAM Price $225.00 All wood kits sawn from aircraft quality birch plywood, spruce and first-grade balsa...one piece plywood Keel, plywood Bulkheads, plywood Main, Middle and Bottom Decks... All plywood Super structure.. .HARBOR TUG: Balsa planked; PATROL BOAT: Plywood sheeted...P o r t h o l e s , Stanchions, Guard Rails, Rudders, Tiller Arms, Skegs, Struts, Stuffing Boxes, Drive Shafts, Propellers and Fittings are furnished...All Deck hardware is pre-cut, ready to assemble from detailed drawings. FOR FURTHER INFORMATION, SEND SASE INCLUDE5 SHIPPING U.S.A. are letting an inexperienced pilot launch of it as compared to a starter motor 1,200 feet of 30-pound braided nylon who might just backlash the winch. I winch. And. I think it would be a good line. You would think that 1,200 feet of doubt any pilot would actually try and club winch, especially when used with any kind of braided nylon line would fill “ kite” this winch line with the Re the Retriever. The Pow’rtow winch the wheel rim to overflowing, but such is triever’s line dangling about his empen shows that a lot of care and thought not the case. There is still another nage just waiting to get tangled up on went into its design. The fact that 3/8ths of an inch to go before it even the stab, but I suppose without the research and development continue to gets close to that point. Retriever someone might try to kite his be done on this winch, as evidenced by The white backing plate behind the plane. It is probably a lot easier just to say the recent addition of a fine-tune ten wheel rim is there to keep the line from during the pilot’s meeting at a contest: sion adjuster for the motor/pulley getting behind the rim and tangling up “ No kiting allowed," and leave it at that. system (which will be standard with all in the pulley or shaft. It works well. Not Anyhow, it is still a good idea as an anti future Pow’rtows), tells me that Ted once did the line get past it. backlash device. Davey really cares about the quality and The wheel is mounted so that it won’t In use, the anti-backlash brake didn't operation of his products. The $300.00 revolve about the shaft as it would on a actually work all the time. What would price tag on the Pow'rtow is what you bicycle’s axle. The shaft is the same happen is that the little rubber-tipped would expect to pay for a winch of this 5/8ths drill rod as is used in the winch. arm would start bouncing on the revolv caliber. I think it’s worth it. This shaft drives the wheel/spool and is ing drum during launch and eventually DSC RETRIEVER mounted in two pillow blocks with bounce all the way over to the “ off” The Davey Systems Corp. Retriever is phosphor-bronze bushings as is the position. Now. to be entirely fair to all an incredible device. For anyone not winch’s shaft. concerned, the fix for this is actually used to seeing a retrieval device like this Driving the shaft is a seven-inch quite simple: get yourself a rubber band on the field, it looks very intriguing, and diameter V-belt pulley which is securely that will fit between the tow ring hook it always draws the curious. Looking at fastened to the shaft by an Allen headset on the frame and the brake arm with a the pictures, you can see why. The most screw. This pulley is driven by the V-belt gentle stretching. This will keep the arm outstanding part of the Retriever is its which is in turn driven by the motor’s from swinging over and won’t add any black five-spoke bicycle wheel spool pulley (1-1/2-inch diameter). noticeable friction to the system. Prob and white, masonite backing. The Re The Retriever’s motor is a four-pole, lem solved. triever literally stands out in a crowd of permanent magnet. 12-volt motor. To sum it up the Pow’rtow winch, I will winches. Again, it is an industrial motor that is say that it is a nicely finished, quality Working from the top down, then used for a variety of things including 12- product. It has adequate power for front to back, we’regoingtogooverthis volt bicycle motors, and model sailplane launching most sailplanes (I wouldn’t device to see what it’s all about. As I just winch motors (the Pow’rwinch, fore put a ballasted F3B model on this winch, mentioned, the spool is a bicycle wheel. runner of the Pow’rtow, used this motor, for example). It is very quiet while It’s made of fiberglass-nylon, it’s very as does the Fab-Tek winch today). It operating: it uses a lot less current than light weight, and as it was meant for has plenty of power for retrieving the most electric winches which enables you bicycle motocross (BMX), you can bet winch line and only draws between 25 to to launch three times as many planes off it's strong! Wrapped on the spool is 55 amps in use. The motor comes OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU 85 oats to bring back the line inspite of the weeds, but not always. If you are a good Get Electrified — at TViUAotef operator, which you will be after a Geist — World-Leading, dozen launches and retrieves, rough fields are no problem. German high technology The launch sequence goes some electric components thing like this; first, you make sure that the line is not still around the retrieval • Geist Samarium Cobalt motors hub. Next, you make sure that there are and flight systems (with slip-on no weeds for the line to catch on as it rings for more power durationl) "casts” out (if there are weeds, pull ’em • Geist Electronic Speed Controls out or place the Retriever on a stand). • Geist Fiberglass Folding Props Let the pilot know you are ready. At this • Geist Electronic On/Off Switches point you are kneeling down next to the • Geist Battery Chargers winch and retriever with the Retriever • Geist "Hot Dog" and switch in your hand. You instruct the "Hot River" Aircraft pilot to merely step away from the winch Contact Wilshire for all electric when he finishes his launch, he must not ^flight components! try to wind down the line himself. Just when the parachute drops off, you stick Catalogs - Sailplane $2.50 your hand out and catch the outgoing Electric * 2.00 retriever line (don’t worry, you won't get hurt). Quickly, you put the line around the line-centering hub and hit wilshire model center the Retriever’s switch. In comes the line m m 3006 Wilshire Blvd. · Santa Monica, CA · like magic! Within about 15 seconds ■■ 90403 · Phone (213) 828-9362 '■ ■ K the line will be almost back, so now you RC Sailplane and Electric Power specialists for the U.S.A. take a step or two to the Pow’rtow’s drum brake and get ready to arrest its Η . , ANTIC-BIPE primarily my own fault as I had allowed it motion. That’s it, you’re ready for the to get too close to the wheel. I pulled it next pilot! Just walk over and pick up the I r Q C l O f V4 SCALE KIT over to the hub again, and everything tow ring. worked just fine from then on. Be In conclusion, the Retriever really careful not to get any loops of line works well. It does the job of retrieving caught in the spool as they can some the winch line quickly, quietly, and times catch this wire. effortlessly. It saves you the long walk to The Retriever connects with the same the turnaround and the frustration of 12-volt, lead-acid battery as the Pow'r not being able to communicate prob tow winch by means of its heavy duty, lems of open or closed frequencies, line spring loaded clamps. If you have a set tangles, or sandbagging . . .because you MAJESTIC WW-1 ERA TWO SEATER. WHEELS OR FLOATS of jumper cables in your car, you know are right there with everyone else, not VERY DETAILED SCALE DESIGN. YET EASY ASSEMBLY what the Retriever’s clamps look like. 200 yards away. No more screaming your SPECTACULAR FLYING QUALITIES. FULLY ACROBATIC. They work just fine and gave us trouble lungs out, "Hey, release the winch!’’ 64IN. WINGSPAN. 7.5 LBS.. USING .45 ENGINES AND UP. free usage. because the winch and backlash brake COMPLETE KIT. LESS WHEELS ENGINE A PROP $ 149.00 f SHIP (some 820 parts, detailed construction manual Λ 5 sheet plans) The framework of the Retriever is the are right there with you the whole time. PROCTOR. P.O. BOX 1333, LA JOLLA. CA. 92038 same steel "angle iron" as is found on When the literature says, "Launch-a- For additional information, call (714)278-9000. or the Pow’rtow; it is light and strong. The minute performance” , it’s not kidding. write. For a complete 40 page catalog, send $ 2.00. weight of the device is 26 pounds. It You can literally launch a whole club (for mounted to the Retriever and wired to measures 18 in. x 12 in. x 21 in. high. example: 20 fliers, ready to fly) in 20 the solenoid . . . no muss, no fuss. In fact, In use. the Retriever is amazing. When minutes if you know what you’re doing. the Retriever is ready to use right out of launching, the line is left in a spin casting Of course, if you knew what you were the box, just attach the removable hand mode. There is very little drag on the doing, you wouldn’t do that or there operated switch to the indicated ter sailplane as it climbs into the sky. We would be radio interference all over the minals on the solenoid, and set up the flew two different gliders off of two place, but I think you know what I mean! line guide as indicated in the layout different winches (the DSC Pow’rtow This one device coupled with the Pow'r sketch. and the SFVSF Orangutan winch) both tow can replace three or four winches Both the Pow'rtow winch motor and with and without the Retriever, and and launch ’em as fast as they come for the Retriever motor are mounted to there was no noticeable difference in literally hours on end (four with a moveable mounting plates. These plates launch heighth. Each winch performed regular battery, six with a deep cycle are the primary method of adjusting ν '- equally well whether it had the Retriever marine battery, 92 amp-hour). I'm sure belt tension. The plate on the Retriever attached or not. Only once was the drag you will like the Retriever. At $250 (plus did not flex like the winch’s did. noticeable: one guy had a new airplane shipping), the Retriever is a good deal. The bicycle hub you see mounted at the field that had a tow hook on the For any additional information on the vertically in the frame to the side of the ragged edge of pop-off land, it was so far Pow’rtow or the Retriever, write to spool is the line-centering device used back. Without the Retriever, it launched Davey Systems Corp.. One Wood Lane, in the retrieval mode. When launching, OK. but with the Retriever it popped-off Malvern. PA 19355. or phone (215) you want to make sure the Retriever’s repeatedly. Normally, this is not a 644-0692. · line is not routed around this hub or else problem at all. but get your tow hook in it will pull the towline right off the glider the right place! about 20 feet into the launch . . . this The Retriever works best on a grass Soaring...... Continued from page 21 happened once, much to my embarrass field such as a school athletic field. If you ment. use it on a rough field with lots of tall As I said, I was next up with my Goat The white wire you see next to the hub weeds (chest height or higher), you will Hill Special (or just plain ol’ Coat for is a line guide designed to keep the line have to be fast on the retrieve and get short), and I managed a decent (for me) from accidentially looping over the hub that line back to the winch before it hits 32.7-second run. Not too shabby for a while launching. This device only failed the ground and gets wrapped up in the first speed run with a new plane! its job once during the test, and it was weeds. Sometimes the motor has the The eventual fifth place winner, Den- 86 MODEL BUILDER HB-ENGINES Made m W Germany Power through Precision H. B. ENGINE ACCESSORIES Made «η W Germany Power through Precision H.B. ENGINE ACCESSORIES HB-ENGINES Made m W Germany Power through Precision WRITE FOR FREE COLOR CATALOG Distributed in the U.S.A. by: BAVARIAN PRECISION PRODUCTS CO. P.O Box 6, 22 East Avenue · New Canaan. Connecticut 06840 nis Brandt, was next, and he smoked a 29.3 with his E-205, built-up winged, high aspect ratio, aileron two-meter. A few pop-offs later, Mike Reagan thrilled the troops with his spectacular speed run. Mike's plane is a fully-sheeted foam core, polyhedral (rudder-elevator, period!), thick wing (MB-303515), fiber glass fuselaged, two-meter that carries around three poundsof ballast for speed runs. Mike’s first three laps were really, exercise his skills to his best advantage. a speck. Afterwards, Jerry confided that really, fast! However, in the last turn, Pay attention CIAM! he really wondered if he was going to be Mike over-anticipated the turn, banked Duration was scored man-on-man for able to make it back to the field. Well, he up much too early, began to over-bank, fairness (are you listening CIAM?). If it did make it back, and had altitude to then started to over-correct for his hadn’t been, there would have been spare. mistake, almost pulled it into theground some very unhappy fliers. A 10-minute The third round of the day was man- when he finally got the flag, almost cut max is impossible without one very good on-man distance. This event could very the center line, roller-coastered out of thermal at least, and those kind of well be renamed unlimited distance as the turn, and finally regained control (all thermals weren’t all too common in the the idea is to fly as many 150 meter laps as in about three seconds!), and then five to 15 mile per hour gusty wind. possible in a four-minute time period. screamed through the last gate for an Scoring was handled like this: there Unlike F3B flying where the idea is to fly incredible 24.7 .. . the fastest time of the were 900 points possible for your flight 12 laps in a four-minute time period meet by about three seconds! He prob which was normalized against all the once you enter the course, and if you ably could have knocked off three fliers of your group; your landing points don’t like your first run, you can re seconds or more had he not lost his (up to 100) were then added to your launch and try again, the 2MWC only sense of timing the way he did . . . as it normalized flight score; finally, the gives you one shot at it. The nice thing was, he depressed everyone’s scores so score totals were again normalized to about 2MWC rules is the speed at which badly that he was way out in front at the 1000 points for the best score. the contest runs compared to F3B (four end of round one. (Interesting to note This event can be very unforgiving of to five minutes per heat vs. 12). The fact that he never lost his first place standing pilot/helper misjudgments. I found out that the scores are normalized within clear to the end of the contest.) the hard way when me an' the Coat only each heat makes it a lot more equitable Halfway through the speed runs, the did 4-1/2 minutes while one other guy than F3B where one heat can have lift wind shifted to almost 90 degrees to the (out of five) did over eight minutes. I got and everyone makes 12 laps, and the course, and shifted back and forth to buried. It was my own fault though, I was next heat has the sink blow through and about 45 degrees where it was most of in the same thermal as the winner. . . he nobody makes 12 laps or any significant the time anyway. With the wind’s speed climbed out, I didn’t. Considering this points as a result. averaging about 10 mph, and with lift was only my first serious thermal attempt Never in any previous 2MWC were occasionally passing through, speed with the Goat, I don’t feel too bad. Most there as many flights of 12 or more laps times were inconsistent. The fast guys people in my round did far worse. recorded as this one. When the lift came went fast (high 20s) when the air was Mike Reagan, flying his chopped-off through, it was strong, and the pilots good, but otherwise averaged in the F3B ship at an empty wing loading of 14 raced their ships through the course like mid-30s. ounces per square foot, managed 1000 crazy. Some pilots were getting 16 and 17 Duration was likewise interesting in points again and remained in first place. laps! I know, I was in a round where that the wind. For a max flight, you need to Probably the worst case of burying happened, but I only managed nine stay up for 10 long minutes. If you were was seen in Jerry Krainock's round, and laps. lucky, you launched high, headed up was done by Big Jerr himself. The wind At this point, the leader of the contest, wind, and hoped for the intermittent was its usual gusty, windy self, and in Mike Reagan, was pulling ahead strongly thermal or wave lift. More often than most previous rounds the pilots had as he scored a perfect 3000 for the first not, however, it was the guy who been launching and flying almost straight day. launched higher than the others who upwind to find their lift. Not so with The Saturday night banquet was stayed up the longest. Yes, in spite of the Jerry. He turned left (downwind), found hosted by the Modesto club at the equal winches, some still launched lift over the neighboring high school Knights of Columbus meeting hall just higher than others . . . mainly because buildings and followed that lifted down outside of town. There was beer, wine, of skill and experience .. . and that’s the wind for a flight that was at least twice as soft drinks, punch, potato salad, pickles, way it should be. A guy who designs, long as anyone else’s. By the time he was potato chips, olives . . . the works! This builds, and flies better than somebody ready to leave the thermal and “ come year saw the return of the two-meter else should have the opportunity to home’’, his airplane was little more than sandwich (actually there were three OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 dihedral under each wing panel. The wings were foam core, 1/16 balsa fully £R0l>X sheeted, thick section (his own MB- COVERUP! Golden Falcon 303515), one piece, Gorilla-proof spar system, and tapered from about nine Sturdy, high quality, rich dark inches to about 6-1/2 inches. Of course, green vinyl-covered binders for Mike flew his own fiberglass Two-Meter your valued copies of MODEL fuselage (also canopyless for strength). BUILDER Magazine. Gold let Mike’s plane featured an all-moving tering on spine and front cover. stab. 4 Channel Third place: Casey Goeller flew what FIRST R/C he called a “ Camita.” As you can prob Trainer ably guess, that’s a contraction of both Camero and Sagitta. The wings were Write tor from his F3B ship, a Camero from West Details and SPECIAL OFFER Germany, and the fuselage and stab ST. CROIX OF PARK FALLS, LTD. were from a Sagitta 900. Casey cut down P.O. Box 279N - Park Falls, Wl 54552 the Camero’s wings, eliminated the flaps, turned the ailerons into flaperons, and redid the spar tubes. The Camero About half the time, it seemed that the uses the Wortmann FX60-100 section. lift was somewhere on the course and The Sagitta fuselage was stock as far as I the pilots were clicking off the laps in it. know. Overall, Casey and his Camita Excitement ran high among the compe were both very competitive. titors as good pilots were pitted against Fourth place: Gary Ittner flew his good pilots (intentionally) to see who Lesser Tern, which is a second genera really was good and who was just lucky. tion Tern (a plane that Alex Bower flew If you were in, say 20th place at the last year). Gary’s plane was a double beginning of day two, you were by no dihedral, flat center panel design. Again, One Binder ...... $5.95 means "out of it.” (I came from about it was a foam core model, MB-303515 Three Binders . . . $15.95 20th last year to take 2nd place). Because section, fully balsa sheeted (1/16), 10- Five Binders .... $25.95 of the way this event is scored, places inch root chord, eight-inch tip, one change rapidly. You have to be very piece construction, and I believe 18 (For more than 5, include good to keep your place when you are at degrees dihedral under each tip. Gary S5.00 for each additional the top, one slip-up and it can cost you, used the Mike Bame Two-Meter fuse binder.) dearly. lage also, and didn’t use a canopy in the Probably the worst ‘‘slip-up" was Shipping: Binders shipped in U S. design. The Lesser Tern uses an all- committed by Larry Jolly who was in moving stab. by UPS only. For one binder, add about third place at the start of round Fifth place: Dennis Brandt flew an $2 00. For each additional hinder·, six. but popped off tow and only man original design aileron ship (name?). It add 75c. For binders shipped out aged two laps. Lucky for him nobody has a one piece, built-up wing using the side U.S.. add S3.50 for one bind completed the course or he might not Eppler 205. Dennis’ plane has a higher er. For each additional binder, add have gotten 80 points! As it was he aspect ratio than most at about 11 to one. dropped to ninth place. Next time he’ll Si. 50. For Air Mail rates overseas, His fuselage was also built-up out of light let someone else throw his Pantera for ply. His stab was also all-moving. This please inquire. him, you can bet on it! plane/pilot combination was practically PLEASE All payments must be in U.S. Mike Reagan steadily lost points in the new at the 2MWC and did very well. funds, drawn on a U.S. bank. last three rounds, but never enough to Sixth place: Jim Wichert flew what he California residents add 6% Sales Tax surrender his first place standing. called a High Anxiety. The High Anxiety WHAT THEY FLEW is a nine-inch constant chord, foamcore MODELS' First place: Mike Reagan flew a poly winged, aileron plane featuring coupled hedral ship. It had a foam core, 1/16 aileron/rudder. thick section (MB- BUILDER balsa fully sheeted, one piece, 15 per 303515). one piece wing, and canopyless 621 West Nineteenth St., Box 10335 cent thick (MB-303515) wing with a Mike Bame fuselage. The stab is all- Gorilla-proof spar system. Originally, moving. Costa Mesa, California 92627-0132 this was Mike’s 85-inch F3B ship which Seventh place: Rick Schrameck (US he flew in Joliet, Illinois, in the U.S. Team F3B team manager) flew his trusty, two- sandwiches), a tradition which was Selection Finals. It wasn't as good a flier year-old Whisper Speed which he pur started at the first 2MWC in 1980. Richard in F3B at 85 inches as it is now at 78 inches chased from a guy (I think his name was Hansen presented the 2MWC cake to against other two-meters. Mike recently Romanie Sfredda) who flew the plane in all, and everyone basically stuffed them completed his LSF eight-hour slope the 1981 world champs in Sacramento. selves. Good times! flight with this aircraft. It features the It’s obviously still going strong in com DAY TWO Mike Bame Two-Meter fuselage: no petition. The wing is sparless. Not in its Day two is three rounds of simulated canopy: molded epoxy/glass; 40.75 self a big deal, but considering it is one- cross-country. The intent of this event is inches long; 7-1/4ounces. The stabilizer pound density foam and a rather thin to emulate full-size cross-country flying. is all-moving, and the rudder is close- section (Eppler 182, eight percent thick), As in full-size practice, non-finishers of loop, pull-pull wire controlled. Futaba it's a minor miracle that it survived the the declared task (10 laps on a 150 meter FP-7FGK radio system was used. At 14 2MWC winches. These wings bent a lot course in the 2MWC) are heavily penal ounces per square foot empty. Mike’s when Rick launched the Whisper off ized. This means that strategy is even plane was on the heavy side. the Orangutans. Rick is the first one to more important in this event than in the Second place: Mike Bame flew an marvel at these fully sheeted wings, as he other three. aileron ship. With his Ace Silver Seven told me something to the effect that The weather conditions on the second radio system, he was able to fly with every time he launches, he’s prepared day were somewhat less severe than the coupled or uncoupled rudder and with for the wings to fold. Well, Rick, so far so first day. Winds were gentler, lift was adjustable differential throw in the good! stronger, and the sky was clearer. ailerons (requires two servos in wings). The Whisper features flaps, ailerons, Day two turned into one big RACE! Mike’s plane had three degrees of all-moving horizontal stabilizer, and 88 MODEL BUILDER 1 Peter W est burg’s SCALE VIEW S SUPER-ACCURATE AIRCRAFT DRAWINGS. USE FOR SCALE DOCUMENTATION AND/OR FOR DEVELOPING MODEL CONSTRUCTION PLANS. ALL DRAWINGS ARE 28 X 40 INCHES BORDER- TO-BORDER, AND ARE SCALED AS LISTED BELOW. 1 /24th scale: W = 1 ft. Shts $ Czech Avia B-534 2 8 Waco ATO Taperwing 2 8 Douglas 0-35/B-7 1 4 Davis D-1K 2 8 Douglas XO-36-XB-7 1 4 Douglas 0-25C 3 12 1/10 scale: 1.2" = 1 ft. Shts $ Douglas 0-31A/0-31B 3 12 Berliner/Joyce P-16 4 16 1/12th scale: 1" = 1 ft. Douglas 0-38/0-38B 2 8 Curtiss BFC-2 Goshawk 4 16 Boeing F4B-4/-3 4 16 Douglas 0-43A 3 12 Curtiss F9C-2 Sparrowhawk 4 16 Boeing P-12E 3 12 Douglas 0-31C/Y10-43 3 12 Curtiss P-6E Hawk 4 16 Curtiss A-8 Shrike 3 12 Douglas 0-46A 3 12 Fiat CR-32 3 12 Curtiss Gulthawk IA 2 8 Fokker D-17 3 12 Great Lakes Trainer 4 16 Curtiss N2C-2 Fledgling 4 16 General Western Meteor 1 4 Hawker Fury Mk I 4 16 Curtiss 0-1B/A-3 Falcon 3 12 Grumman F2F-1 3 12 Hawker High Speed Fury 3 12 Curtiss P-1B Hawk 3 12 Grumman F3F-2 3 12 Hawker Persian Fury 3 12 Curtiss XP/YP-23 3 12 Stearman 4E Mailplane 2 8 Monocoupe 90A 2 8 Curtiss SBC-4 Helldiver 4 16 Travel Air 2000 2 8 Swedish Sparmann P-1 2 8 ORDERING INSTRUCTIONS Price includes 3rd or 4th Class mail. For Airmail or ders. Master Card or Visa orders add 5%, include card First Class in U.S., add 25% of total order. For Over number, expiration date, and signature. Send pay seas Airmail (includes Canada and Mexico), add 50% ment to MODEL BUILDER, P.O. Box 10335, Costa of total order. Remit by International Money Order Mesa, CA 92627. or U.S. funds drawn on a U.S. bank for overseas or CALIFORNIA RESIDENTS ADD 6% SALES TAX OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ‘ EM MODEL BUILDER SENT YOU' 89 layer fiberglass skins. I could be wrong about the carbon because I’m basing my info on Brian Chan’s Half-Fast Solution JOHN POND which was very similar to Don’s airplane. Don used the E-182 section in his design while Brian chose the E-214. Anyway, Old Time Plan Service Don was very impressive in one of his The largest selection of plans in the world at the most 10-lap heats on the second day when he reasonable prices. Each list $1.00 literally blew away his competition. I wish I had the raw data on this flight All 4 for $3.00 group because I’d say he probably beat No. 13 OLD TIMER F/F GAS everyone else (who completed 10 laps) No. 13 OLD TIMER RUBBER/TOWLINE by close to a full minute! Looking at the No. 13 OLD TIMER FLYING SCALE A through K plane finish the course made you think he was completing a four-lap speed run. No. 13 OLD TIMER FLYING SCALE L through Z FAST! New plans prices effective Nov., 1982 - Nov., 1983 The Solution features flaps and P. O. Box 3215 ailerons, all-moving horizontal stabi San Jose, Calif. 95156 lizer, and rudder. Don flies with un coupled rudder, a more difficult, but Phone (408) 292-3382 precise way of getting just the right rudder. The fuselage is longer than most (Remember the song about a boy named amount of rudder exactly when you two-meters and shows a definite Dassel Sue?) The EPR is a much modified need it. It takes practice, but Don feels influence (as does the rest of the plane). Pantera: center panels clipped (tip it’s worth it. Eighth place: Keith Kindrick flew a panels not cipped), tip panels flattened Eleventh place: Angel Sanchez- clipped wing Gemini MTS. The Gemini to zero dihedral, and center panels built Figueras took time out from his heavy is a built-up, polyhedral winged design with three degrees dihedral each side. study schedule in dentistry (finals were kitted by Pierce Aero Co. Keith flew it Flaps were added to the center panels, the week after) to compete in this year’s rudder/elevator only (no spoilers or and ailerons to the tip panels. Two 2MWC. He flew a two-meter with a flaps). The section used in the Gemini servos were buried in the wings to Mike Bame fuselage and a Bame-cut MTS is the MB-253515 (2.5 percent control the ailerons. The flaps were foam core wing aileron ship. The section camber, 35 percent high point. 15 per controlled by one servo in the fuselage at the root was an Eppler 193 (10-inch cent thick). What more can be said . . . and a neat torque rod set-up which chord) which transitioned to an Eppler the Gem’s is an all-wood, readily avail allows the wings to plug in or out 182 (eight-inch chord) at the tip. He able kit airplane, and it was the only kit without any fasteners. Closer inspection sheeted the wing with 1/16 balsa, lead airplane in the top 20 or so places .. . revealed the trick: square brass tubing ing edge to trailing edge, then glassed come to think of it, there were probably inside round brass tubing, an old, but the wings with 3/4-ounce cloth. Spars less than a half-dozen kit airplanes, reliable system. (See sketch.) The EPR, were standard-size 1/8 x 3/8 spruce caps period. like the polyhedral Pantera, uses the with full-width shear webbing (balsa), One of the funniest (and probably the Eppler 205, however, the EPR is fully and full-width ply joiners. He calls his most satirical) remarks heard during the sheeted. ship the Mugen. which means without two day event was credited to Keith. Larry was in the running for first or limits in some unknown (to me) lan Bear in mind that I didn't actually hear second place, and had he not popped guage. The horizontal stab has a rather this first hand. Anyway, when kidded off tow, he might have won the contest. I thick, 14 percent section, with negative about flying a thick section. Keith said. say this to let you know that the EPR is a lifting camber. "Thick sections are only a problem for lot better airplane than the ninth place Angel was so pleased with the events people with thick minds." To which finish demonstrates. Larry came to the that make up the 2MWC, the way it was various members of the SFVSF laughed contest with only one day’s practice on organized, the way his Mugen flew and heartily . .. they’ve been saying that for the ship, and NO sleep the night before the way he himself flew, that during his years! the contest. I’d say he did rather well. finals he had a hard time NOT thinking Ninth place: Larry Jolly, as mentioned Tenth place: Don Edberg flew the of the contest. He was high on excite earlier, flew a variation of his Pantera aforementioned, all fiberglass Solution. ment both during and after the contest! which he called El Pantera Rosa, or The I believe the wing’s structure goes like Twelfth place: Joe Newland flew an Pink Panther, if you prefer. Yes, it was this: two-pound density, "blue foam" airplane developed in the South Bay Circus Circus pink, and yes, with a color core; carbon fiber stringers; ballast Soaring Society club of the San Fran- like that, you can bet it had to be good! tubes which double as spars; and multi cisco/San Jose area of California. Lee Hodgdon, Ed Holder, and one or two others also flew this design called the YES-SIR.YES-SIR, THREE BAGS FULL ! Harrier. Basically, it is a foam core winger with flaps and ailerons, the ^ ru Bm A VAIL-ABlE N° yu rudder is coupled to the ailerons, and it has an all-moving, T-tail stab a la Sean Bannister’s Algebra. The wing section used was a modified Eppler 374 (1-1/2 percent thicker). The fuselage was molded fiberglass. 3ΛΛΊΕ- MUne>ER. o r FL/tAJS-Stm*. P*./C£ ! Thirteenth place: Bill Forrey (hooray!) WALT MOONEY NOW OFFERS 4 BAGS OF PEANUT SCALE PLANS flew his soon-to-be infamous Goat Hill ALL WELL TESTE0 DESIGNS, AT ONLY »5 00 EACH Special (ugh, what a name!). I gave a detailed description of this bird (flying EACH BAG FEATURES FOURTEEN PEANUT PLANS. mammal?) last month. Briefly, it is a foam ONE OTHER, PLUS PHOTOS AND INFORMATION core, fully sheeted (1/16 balsa), E-205 SENO *1.00 FOR COMPLETE LISTING AND SAMPLE PLAN TO: sectioned, aileron design with coupled rudder. The all-moving stab is a WALT MOONEY, 2*12 CABRlLLO MESA DR chopped-off Gemini MTS part. The SAN OlEGO, CALIFORNIA B 2 I2 3 fuselage is my own design, molded in epoxy and fiberglass. My trusty, new Ace 90 MODEL BUILDER Gfbr G77ze Serious Modeler ■ FFC Charge System- The R/C world has been waiting for this product for 30 years! A dependable, fast/slow rate charger that will safely and rapidly charge both receiver and transmitter batteries from a 12V DC source, then automatically cut back to an overnight charge rate. For 4.8V receiver and 9.6V transm itter packs only. Charges a 500 mah receiver pack to 85% in less than an hour. Available in kit form or assembled. Both are furnished less connectors. 34K40 FFC, Kit $29.95 34K40C- FFC, Assembled $39.95 r CVC - Constant Voltage Charger- The CVC (Continuous Voltage Charger) is a 110 Volt charger for all 12 volt starting batteries. The CVC delivers a constant 400 ma HI charge rate for 90% of the charge cycle and then tapers to a 15 ma trickle charge rate which will allow a safe full charge of any 12 volt wet cell, sealed lead acid, or gell cell battery. 34K30-Ace CVC, Kit $24.95 Send $2.00 for o u r| 34K30C-Ace CVC, Assembled $29.95 100 page catalog. All Ace products are available at your dealer. If you must order -TachMaster- direct, add $1.00 ■*>* The Ace Tachmaster is an optically coupled handling fee. analog tachometer that is easy to read and easy to use. Featuring a dual range o f 0-5000 RPM and 0-25.000 RPM. This makes the Tachmaster an extremely accurate and versatile instrument. Whether you are a competition or sport flyer, the Tachmaster is a must for your flightbox. 26K25-Tachmaster, Kit $29.95 BOX 511D, HIGGINSVILLE. MO 64037 (816)584-7121 26K25C-Tachmaster, Assembled $39.95 Silver Seven does its job w ell. . . and as I Casey Goeller’s Camita . .. which, as eight of the top 10 used new-generation gain familiarity with the CHS, so will I mentioned earlier, uses the FX60-100. If radios: Ace, Futuba, Kraft, and Air- (hopefully!). there were other significant sections tronics being the most popular. There I think I’llend this section of my report present, I failed to note them. were a couple of |Rs present also. right here. Next, I want to make some Fiberglass fuselages were all over the The trend toward aileron ships is interesting design observations based place, and it seemed that 50 percent of continuing, as expected, but the winner on the top thirteen places. the fliers used them. The reasons for of this year’s competition, Mike Reagan, TRENDS IN WINNING their popularity have to be many: flew a very nice poly ship. Three of the TWO-METER DESIGN strength without undue weight; ease of top 10 flew polys. Conclusion? If you’re Starting with the wings, I must say that manufacture and/or availability from good . . . it don’t matter what you fly! the most obvious trend in design is “ backyard” manufacturers; speed of Guess we’ve known that all along. toward composite structure. This trend construction; typically excellent drag One final trend . .. and it has to do has been gaining popularity for years, characteristics from smooth, round, with wings again . . . people are finally and is now to the point where the cross-sectional shapes; and probably learning the importance of adequate majority of fliers chose foam core wings more. Of the top 10 fliers, seven used spar structure. The Orangutan winches over the built-up variety. Seven of the molded F/G fuses. (actually spelled Orangoutang) weeded top 10 flew foamies, and so did 15 of the Getting back to wings for a moment, it out the inferior designs right quickly. top 20. Eppler sections are still the most is interesting to note that one-piece The first day saw an incredible number popular with numbers such as 205,182, wings are gaining in popularity. Most of spar failures (around six. I’d say), one 193, and 374 popping up most often. The builders are realizing that one-piece of which was a thick section . . . with a Mike Bame sections were second most wings can be made stronger and lighter poor glue joint between the joiner popular with the MB-303515 and MB- than two-piece wings. The 78-inch span (which ended abruptly) and the spar 253515 claiming first place, second of the two-meter class sailplane allows caps . . . a double-no-no. If you are place, fourth place, sixth place, and this type of design without causing building a multi-task, two-meter air eighth place (five of the top eight), or at undue hardships of shipment or storage. plane, don’t use anything less than a least 13 aircraft in thecontest. I won’t get Eight of the top 10 used one-piece 1/8 X 3/8 spruce spar capped I-beam into a thick-versus-thin argument over wings. design with full-width shear webbing at the contest results .. . but I will say that The almost unanimous choice of the root (plywood, tapering out to I- what the thickies gave up in L/D (which stabilizer design was the all-moving stab. beam balsa webbing at about 1/3 of the is probably only a point of L/D), they Most were mid-fin locations, but T-tails half-span). made up in launching height, as they were a very strong second. Most stabs To sum it all up, this was the best were usually about 20 to 50 feet higher were of built-up construction. Notable 2MWC yet, and if you missed it, you than most others at the top of the zoom, exceptions were the Whisper and the really missed some exciting flying, and and at the start of the course. Speed and Solution (foam core). some outstanding fellowship . . . glider thermal duration are the MB’s strong On the electronic side of things, there style! areas, and need no further description. is a definite trend toward “ high-zoot” , F3B WINCH RESPONSE Third place was taken by the only everything-on-it-please radios. At least Last month, I wrote a piece about the Wortmann section at the 2MWC . . . six (for sure) and possible as many as current state of affairs as regards to the OCTOBER 1983 WHEN CONTACTING ADVERTISERS. I ’EM MODE I BUILDER SENT YOU! 91 A CUT ABOVE Precision cutting instrument outlasts the competition by ten to one. The Uber Skiver was designed to meet the pre such becomes the perfect cutting tool for the cision requirements of photofabrication, micro- discriminating modeler. circuitry, graphic arts production, etc., and as fAT f£l40. qcQd^ it • U.S.A.- «OM°^ÄGO»«° V i í H H W H · . 10 11 15 20 • Long-Life Slamless Steel Blades Availiable in seven satin anodized handle colors: silver, blue, red, green, gold, black, and violet • Rear Draw-Bar Clutch Complete set in fitted hardwood case; includesUber Skiver, together with two vials containing • Instrument-Quality Materials fo u r No. 11, and one each o f Nos. 10, 12, 15, and 2 0 ...... $1 6.95 • Advance Collet Design Individual handles (specify color) ...... $6.95 • Hex Cross-Section See y o u r dealer, o r order d ire c t. Vial of 6 blades (No. 10, 11, or 1 5 ) ...... $3.00 • Deeply Knurled Grip Dealer inquiries are invited. (No. 12 o r 2 0 ) ...... $4 .00 • Blades can be resharpened 0 VISA and MASTERCARD PRODUCTS add 5% MODEL BUILDER 6% sales tax, California residents P.o. Box 10335, Costa Mesa, CA 92627, Dept. A.V. winch mess in F3B. Reaction to my of "Muscle Builder." I was especially is exactly what I've been saying. You just solution has been unanimous^trong^nc) interested because both main topics said it better. I'm glad to see this sort of very positive. Almost without exception, follow right along with two phases of the thinking going out to the masses. Al F3B pilots are thanking me for getting hobby that I'm involved in. though I'm sure he’s read it, I for things out in the open, and for suggest 7) The fun-fly contest as set-up was an warded a copy to Herk Stokely, com ing publicly what has to be the ultimate interesting concept. Apparently. Curt mittee chairman, with my complete solution to the F3B winch problem. Stevens and crew put forth a tremen endorsement. Organizer supplied Three of these F3B pilots who were the dous effort. I do hope that it pays off in winches is the main thing I’m pulling for. most outspoken were Dick Everett the future! We have set up our regular I, personally, have qualified for the last (who's probably been a modeler longer monthly contest with three skill levels, two finals, but do not attend because I than I've been alive on this planet), Scott i.e., novice, sportsman, and expert. In an did not have a "support team" to take Christensen of Top Flite, and Don effort to attract less experienced glider with me. In my area, there is a very Chancey (designer of the LJMP Pantera) pilots to participate. This concept is of limited supply of FAI fliers. Even fewer of Texas. course, not new. The E.S.L. has done this are enthusiastic enough to travel cross Dick called by telephone and was for years. I'm sure many others have country as helpers. There are a few of us noticeably fired-up. He demanded that I also. As part of the soaring steering who would participate without the send a copy of my column to John Worth committee formed by lohn Griggat the "winch hassel.” at AMA HQ right away. He was very 82 Nats, I have "suggested" that we take Many problems have to be solved yet. upset at the entire history of the Cl AM’s a look at some similar system on a but at least we are thinking in the right last-minute, rules changing “ shenani national basis. I fully believe this would direction. gans,” but especially the latest one. attract more flyers than separating by Keep up the good work and the Dick’s point was that there should be age groups. Having been event director excellent column. Good lift. Don. more stability and more responsibility at the '87 and '82 Nats, I can tell you that SIGN-OFF on the F3B committee than there cur entries in Junior and Senior have been That’s about it for this month. Next rently is. alarmingly low. In fact, the majority of month we'll have all kinds of good stuff Scott called by telephone to say that trophies for those classes went un for you . . . including a separate report he'd help support (financially) any move claimed. I would never, ever want to do on il.e World Championships (I hope), to sponsor a set of winches for national anything to discourage, or make it as I should be back from England in time use (F3B or AMA), and said that or harder for any younger flyer. (I have a 70 for the November deadline. See ya then. ganizer-supplied winches for major F3B year old son who is learning to fly.) I do contests are what he’s been saying we've feel, however, that a separation by skill needed for years. level would benefit and attract more Counter...... Continued from page 9 Don wrote me a letter, and rather than people. It has worked for years in try to explain it to you (I’m actually tired "Pattern"! It's something to consider. protective carrying case so you can take of writing at this point in the column), 2) As you are probably aware, I am the it with you to the field. This new device is I’m going to let him speak for himself. district VIII rep. on the newly formed available at your favorite dealer, or write Dear Bill. FAI/F3B committee. I must say your Coverite, 420 Babylon Rd., Horsham, PA I read your column in the August issue column on FAI rules was excellent! This 19044. USA. 92 MODEL BUILDER ★ ★ ★ From the people who brought you Zap, Zip Kicker, Slo-Zap, and a lot of other fine adhesive products comes THE MODELERS'CHOICE D $25.00 For one year subscription Subscription copies mailed in envelopes, add $3.00 another Z products . . . Z-Magnum. Unlike Pacer Technology’s line of D $32.00 Outside U. S. including Mexico and Canada in protective envelope .add $3.00. cyanoacrylate adhesives, Z-Magnum is a O utside U. S , One year subscription only. « JO T ! RIO * LDITORIAl CONTENT Please enter my subscription: ΠΝβνν □ Renewal • HIGHER tDITOKIAL TO two-part, no-mix, structural acrylic ADVERTISING RATIO adhesive system. Nam«______• THE FINEST AM) MOST COMPLETE CONSTRUCTION The Z-MAGNUM system consists of Address _ ARTICLES primer and base resin components. The • PLAN SERVICE C ity _____ - Zip _ • UP TO THE MINUTE ARTICLES primer is applied as a very thin coating to ON NEW PRODUCTS AND Country _ PRODUCT REVIEWS the least porous surface to be bonded. • CONTEST ANO SHOW COVE RACE The base resin is applied as a very thin M/C or VISA # _ coating to the mating surface. Cure _ A d d 5% -MODELS' begins upon mating the two surfaces. Expiration Date. S ignature______MAIL TO B U I L D E R No mixing of the component materials is P.O. BOX 10335, required as with epoxy products, and Prices subject to change w ithout notice. I the Z-MAGNUM system is correspond COSTA MESA, CA 92627 ingly cleaner, more economical, and stronger than epoxies. The Z-MAGNUM interested in getting into modelling and will work on oily surfaces, whereas the aren’t quite sure how to go about it. As a RELIABLE ENGINES epoxies will not. PR tool, this booklet entitled “ Building AT The Z-MAGNUM system will develop and Flying Radio Controlled Airplanes” cure-to-handling strength in approxi should be quite handy for bringing in REASONABLE PRICES mately one minute, with significant possible new club members. It’ll keep Midwest Model is the source for: strength development in about four the newcomer busy for 10 minutes or so hours. . .. while you finish your flight .. . and • IRVINE ENGINES FROM ENGLAND The Z-MAGNUM chemistry provides then the two of you should be able to • H.P. ENGINES FROM AUSTRIA the best strength for bonding glass, communicate intelligently about all of • COMPLETE STOCK OF SPARE PARTS metals and plastics either to themselves the little details. At the end of the • COMPLETE SERVICE FACILITY or in combination. pamphlet, St. Croix recommends its own Z-MAGNUM is easily cleaned off of beginner’s plane, the Golden Falcon, as Dealer Inquires Invited parts or hands with acetone. Acetone a good first plane. w a r n OR CALL FOR MORE INFORMATION can be used as a debonding agent for If you feel that you or your club could MIDWEST MODEL I disassembly of parts if necessary, but use a little help in recruiting, or if you are Z-Magnum remains unaffected by gaso a beginner yourself and just want a few line, alcohols, and paints. basic questions answered, you can pick m BOX M IR «OMCOVA.Lt A *0441 J I J T » t * » Also new from Pacer are Plasti-Zap up this booklet at the above address for a and Z-7 Debonder. Plasti-Zap is specially mere two bucks. Sucha deal! instant charge access or inspection of formulated to be used on all styrene ★ ★ ★ NiCd voltage from the exterior of the plastics. Plastic kit models can now be Kimbrough Products has just released model . . . all without takin’ the fool assembled in a fraction of the time with thing apart! It’s handy to use and made this new adhesive which “ tacks” to its newest products into the R/C car accessories market: first, the Gear Adap of fuel proof nylon. It will fit fuselages up gether parts in 10 to 15 seconds and tor which allows Tamiya offroad racers to 1/2-inch thick. permanently bonds them in just a few the opportunity to benefit from Kim New product number two is a set of minutes. Each bottle comes with a brough Products wide range of gears Thrust Plates in three different sizes for Z-Ends applicator tip and a "tip-top” (for only $1.25 each); and second, the .20 size engines (No. 102), .40 size closure. For faster bonds, Zip-Kicker Wingties which allow the R/C car racer engines (No. 103), and for .60 size may be used with Plastic-Zap. to easily and quickly mount or remove engines (No. 104, pictured). Each set Z-7 Debonder is a water-based, wings from already bent support wires contains three different shims for patented product that will remove ($2.50 a pair). mounting between the engine mount cured cyanoacrylates from any surface, and the firewall of the aircraft. Each shim including your hands. Z-7 will not attack For additional info on these or other Kimbrough Products write to 1430 East St is made of molded nylon and has mark styrene plastics, but can be used to Andrews Place, Unit E, Santa Ana, CA ings for either round or square engine remove model paints. This process is a 92705. (Minimum order $10.00) mounts. Shim I is a one-degree shim, slow one, and can be used to weather or Shim II is a two-degree shim, and Shim highlight surfaces for more scale effect. ★ ★ ★ Flow would you like to havea bumper III is a three-degree shim. Don’t mess Plastic canopies on model aircraft can around with washers or flimsy wood be adhered to their respective surfaces sticker witha little adult humor on it that relates to our hobby? Curious to know shims . . . go solid, go with Ernst Thrust by applying Zip-Kicker with a cotton Plates. swab to the gluing surface of the canopy, what it says? Flow does “ R/C Modelers Do It With Frequency" hit you? New product number three is a pair of and Plastic-Zap to the mating surface. molded nylon Pushrod Exits available in Seconds after assembly, the canopy is B&R Flobbies, P.O. Box 192, Oscoda, Ml 48750, will sell you (or deal you) one two sizes. Number 105 is intended for solidly mounted. the large Sullivan Gold n’ Rod (which is All Pacer products can be purchased or more of these vinyl bumper stickers for $1.75 each. Just write and say you actually blue), and No. 106 for the through your local hobby shop. For smaller red rods. Hot Stuff is the only further information, write or call Pacer want one, or look for one in your local hobby shop. adhesive you’ll need to install these Technology and Resources, Inc., 1600 Pushrod Exits. Try ’em, you’ll like ’em. Dell Ave., Campbell, CA 95008, (408) ★ ★ ★ Look for these and other Ernst prod 379-9701. Ernst Mfg. Inc., P.O. Box 248, Bright- ucts at your local hobbyshop. For more ★ ★ ★ wood. OR 97011. has three new prod information write to Ernst at the above ucts that it would like you to know St. Croix of Park Falls, Ltd., P.O. Box address. 279, Park Falls, Wl 54552, has a handy about. ★ ★ ★ little booklet for sale to individuals or New product number one is a Charge clubs that answers 14 of the most com Receptacle (No. 101) which fits Futaba The new Prather “ Fast Cat” Tunnel, monly asked questions by those who are radio system charge plugs/jacks for from Prather Products, 1600 Ravenna OCTOBER 1983 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 93 GOON — 193 FEATHER MERCHANT TEXACO/ANTIQUE 1939-1941 — 75 " A - 46" / $21.50* $31.95* C - 7 2 " / $27.95* R/C ASSIST / $36.95* LEHMBERG ENTERPRISES PRICE OF KIT INCLUDES: PLANS, RIBS, WING AND TAIL TIPS, 2646 Bolker Drive PLYWOOD, BALSA SHEET AND STRIPWOOD, MUSIC WIRE. NO CEMENT, LIQUIDS, COVERING OR HARDWARE. Port Hueneme, CA 93041 ‘Plus Shipping and Sales Tax. where applicable. (805) 984-6639 ★ ★ ★ idea what might have been wrong? Dear Jake: —At W it’s End in Whitfield Why don't you ever call,' or maybe Dear At Wit’s End: drop me a line once in a while? I’m not You should’ve taken off downwind. dead you know. Everybody knows ducks only fly south in —Your Mother the winter. _ t , u . Dear Mom: A good silicone tubing works best with high nitro fuels. Plug Sparks . . . Continued from page 32 Authentic, lightweight Love. Jake ALUMINUM SPINNERS ★ ★ ★ CLASS ANTIQUE TIME & COWLS Dear lake: 1. Jack Alten (Dallaire/HB 60) 41:00 Please excuse this letter being written 2. Jim Kyncy (Dallaire/Rossi) 39:00 CUSTOM MADE TO YOUR ORDER on my lunch bag. but I had a great idea 3. Don bekins (Valkyrie/Hornet) 25:30 Individual and kit manufacturer inquiries invited. TEXACO TIME JERSEY METAL SPINNING while I was eating my tuna fish sandwich 1. George Steiner 1400 Unit G, E. St Andrews Place this afternoon, and I just had to share it (Miss America/S.T.) 60:00 with you. Why don't we hold the Na Santa Ana, CA 92705 2. Don Bekins (Gas Bird/OS 60) 51:04 tionals at a neutral site every year, like 3. Jim Parsons (Ehling/Merco) 28:25 (714) 957-0794 Newfoundland? Everybody would have 1/2A TEXACO TIME to travel a long way, so nobody could 1. Don Bekins (M-G) 28:12 Ave.. W ilm ington, CA 90744, (213) complain about the lucky locals. Also, 2. Paul Forrette (Panther) 27:50 835-4764, is an improved version of there wouldn't be any biased judging 3. Stan Lane (Playboy) 26:34 . . . Wait a minute! Those Canadians ELECTRIC TIME Prather's own record-setting 29 inch 1. Jim Ogg (Mike) 10:53 Tunnel for the K&B 3.5cc outboard probably only know how to judge in the 2. Al Fabian (Playboy) 9:59 engine. The new 28 inch “ Fast Cat" metric system. Well, forget that idea, but 3. Jack Alten (Interceptor) 9:31 Tunnel features a six inch tunnel with an don’t worry, I’ll keep trying. SWEEPSTAKES POINTS improved, stepped bottom which allows —Still Thinking in San Mateo 1. Don Bekins 51 outstanding straightaway speed, yet ★ ★ ★ 2. Jim Kyncy 32 holds firm in the turns. The Fast Cats Dear lake: 3. Ed Solenberger 25 excellent turning ability without spin My ROW Satellite 7000 ran over a outs is what sets it apart from most mallard duck, and now I'm in trouble ENGINE OF THE MONTH tunnel boats. with the ASPCA. What should I do? This month’s engine is another prod The kit features a factory molded —Fowled in Florida uct of the San Francisco Bay Area that cockpit area with plywood transom Dear Fowled: failed to get off the ground, the Roll plate and turn fin plate factory installed. Tell them it was an accident, just like “ Pegasus” 40. These features speed construction time any other quack up. _ja|ce Jack Roll and his son flew Ohlsson products, a Pacemaker with an Ohlsson tremendously, making the "Fast Cat" ★ ★ ★ one of the fastest building boats on the Gold Seal Engine. They formed a part market. A complete instruction book is Dear lake: nership in flying that was good enough to win the Junior Class at the 1938 State included with step-by-step photos along Last November I finally finished my with an update sheet which lists all other quarter-scale R/C model of the Grum Fair. accessories needed to complete the kit. man Duck. It was too cold for amphi An aviation machinist by trade, Roll The factory joined epoxy fiberglass bious operations, so I took it to our club worked at the Alameda Naval Air Sta hull comes with a removable epoxy field for test flying from solid ground. tion. Jack was always experimenting fiberglass cowl, foam flotation and Our runway runs north and south and with ways to gain more rpm, more aluminum turn fin. For more informa we sometimes have a crosswind prob thrust, and a better flying model. Hence, tion. write to Prather Products at the lem, but on this day conditions were it was no great surprise to this writer above address. · perfect. The wind was straight out of the when his method of mounting an Ohls north and right down the runway. I son motor was featured in the June 1938 taxiied the big model out and roared Model Airplane News in the “ Gas Lines” Dear Jake...... Continued from page 6 into the wind. But the dumb thing Column. As noted from the writeup: wouldn't fly. I tried again and again, but “ The gas tank serves as a motor Dear Confused: it just wouldn’t lift off. It seemed to have mount, made from dural plate stamping Stabilizer and rudder are parts of your plenty of power and adequate flying cut to the size of the crankshaft and airplane. An elevator goes up and down speed. The CC was correct and all the riveted in place. The whole unit is then in a building, and a fin is part of a '59 controls were working and moving in mounted on a vertical dural firewall Cadillac. —Jake the right directions. Do you have any which in turn is fastened to an easily 94 MODEL BUILDER removed plywood bulkhead.” Also shown in the photo is a unique propeller, an adaptation of the Maynard Di Cesare propeller. Actual measure AN ALL-AMERICAN WINNER ments indicated this staggered arrange ment gave more thrust when compared to the standard prop. Furthermore, Roll claimed that the air RETURNS! is drawn toward the hub and the motor Super-Cyclone runs cooler because of this. The nearest GR Series item is that the pitch of the propeller can Single Ignition be easily changed. Airplane Engine With such an inquiring mind, it was no great surprise when Jack decided to turn out an engine looking somewhat s u p in like a cross between a Gwin Aero and a Baby Cyclone. The original castings were unnumbered and unidentified. Later castings came with the name, “ PEGASUS” on the by-pass. Also, apparently because of crank shaft tempering and machining prob lems, the rotary valve was dropped and the updraft venturi was not drilled in the Pictured above is the SUPER CYCLONE as it was then, and as it will rough casting. In its place, the standard be today. rear three port intake (resembling the This ruggedly built champion will soon be available to you Bunch engine) was installed. There is no once again. record or photos that indicate the type Our “Super Cyke” reproduction holds to the most exacting standards tank used with this model, but it is a safe of original detail. Using today’s technology, we will provide you with a bet to assume a float or round type tank guaranteed engine; built to perform as only the SUPER CYCLONE was employed. The timer was rather massive looking, can Included in the $189.50 purchase price: but quite practical with all parts ( Additional $4 00 charge lor postage, handling, and insurance » m ounted on an alum inum plate • Run tested SUPER CYC LONE engine • “Original" parts list with numbers "hogged out” from solid stock. Timer • Ignition coil, high tension lead, modilied points and spring arrangement were condenser, and spark plug* • “Original" display box automotive type (part not identified but • “Original" cowl decals • Warrant) card does look like General Motors) that • “Original" owner’s manual • II c o il and condenser not required, deduct S5.00 could be easily adjusted for proper gap. The engine came complete with an Deliveries will begin in the fall of 1983. Your delivery position is AC brand plug. No performance figures established by date of order receipt, $75 deposit required with order. are available, nor is there a recom mended propeller size. y Order yours today! In breaking down the engine, the following measurements were taken: Super Cyclone Engines bore, .8125 in. (13/16); stroke, .781 in. (25/32), giving a displacement of .40 cu. P.0. Box 10658· Phoenix, AZ 85064 · (602) 274-3375 in. This is larger than the Baby Cyclone of .37 cu. in., and slightly smaller than a MasterCard and Visa welcome (add 5%) the Gwin Aero. The engine has a one-piece cast Nam e__ aluminum cylinder and crankcase. The Address crankcase rear plate was a machined piece bolted to the rear with four 3-48 City State. Zip. screws. A machined steel head was M/C. Visa # Exp. provided, as was a cylinder liner and piston. All in all, it was not a bad looking Signature _ engine. Like a lot of the would-be engine the rumor was that Bill Brown of Brown C.I.E. bragged about how his six-year- manufacturers of that early era of gas Jr. fame was involved. old son, Douglas Ruff, could easily start modeling, the company was under Nothing could have been further the engine. For those who would want capitalized and was unfortunately un from the truth. In a telephone con to see what Daymon Adcock’s son-in- able to advertise the product. The versation (and later backup material) law looks like (Ruff married Adcock's engine has since become a curiosity and with William A. Ruff of Route 2, Box daughter), photos of Damon’s models definitely a rare engine for the collector. 396A, Cottonwood, CA 96022, Bill stated with Doug Ruff in the picture can be As project No. 165.3, Karl Carlson he and Barney Snyder formed a partner seen in the July and August 1982 “ Plug indicates he will machine up a few of the ship to manufacture and sell the C.I.E. Sparks” column. castings he has in stock and complete engine under the name of Compression Anyway, we are pleased to set the several engines to augment several Ignition Engines, Division of Model- record straight and hope you, the collections. That should make the col craft, 11921 South Western Ave., Los reader, will benefit by it. lectors scramble! Angeles, CA. THIRTY YEARS AGO, I WAS... C.I.E. REVISITED To prove his point, Bill says he still has I received a most interesting letter Every so often, one will accept hear the original casting made in a plaster of from Cedric Galloway of 14624 Willow say as fact and never question it for many paris mold in his backyard. Bill also Street, Hesperia, CA 92345, describing years. Such is the case of the C.I.E. claims his engine is the first American his early control line attempts. Fie sub recently featured in our “ Engine of the diesel. mits Photo No. 9 showing an original Month” . When the motor first came out, Some of the early literature on the design with Ohlsson 60 for power. As OCTOBER 1983 WHEN CONTACTING ADVERTISERS, TELL ’ EM M O D E l BUILDER SENT YOU! 95 ■FULL-SIZE PLANS SERVICE· by h ol uuul hn aot the about thing unusual only the ably rnewn,sa,adeeaos Prob elevators. stab,and wing, orange ablue had dark it dope; nitrate and silk interested in controlline models. controlline in interested supplies were rather hard to come by by so come to hard were rather supplies Victory on ranshop a who model Austin sez:Ced n cre upr n lwr halves lower heavy and four gave them then Iseparately. upper carved and oes Te oe ws oee with covered was model The myself models. plans the up drew I framing. oe, n wt te a n I became I on. war the with and model, ea,bt t isn't! it but metal, international with rudder, fuselage and ld i Brak Clfri, in Clyde California, Burbank, from in Blvd. model flight an (or free Seal blueprints early Cold of set a Ohlsson and engine early an bought e ta cas wae ild n About in. filled weave coarse that get never did get around to building the F/F building to getaround never did model was the cowling which looks like looks which was cowling the model ot of coats used I tis n apid hm o h form the to them applied and strips lcs ih irt dp. li down laid I layers several four or with paper of dope. three nitrate with blocks nwn vr ltl aot oto line control about little very knowing 96 doped with coat after coat of dope clear coatof coatafter with doped last layer. the over dope clear coats of hee lt ws hn vrad and overlaid then was cloth Cheese fairly smooth finish. After removing the removing After finish. smooth fairly coats,second and gave first the a tween three coats sanding to between of plenty took Itwasweave the covered. of most until blue dope. You might say Youmight dope. blue this was a poor form blocks. I gave the inside a coat of a coatinside gave I the blocks. form o 983- T CORONET 5.00 $5 T E N O R O C .T. -0 3 8 9 No. o 9 2 L' STLER $5.00 R E L T IS H 'W IL L 32 98 No. o 93 BUHL AI $4.00 N A D E S IR A L H U B 9831 No. o 1083- T WE $5.00 Y G ED W .T. -0 3 8 0 1 No. o 182 TABRI $5.00 IA R B A IT C $6.00 10832 No. T A O B ILE S IS M RUSS. 10831 No. ------ulig ntutossee at te article. the f o seere part instructions building gj/ jg M uig h wr bla n model and balsa war. the During Imade I off, First it. about you tell me Let d %t rdtcr res Minimumorder. *5.00 orders card credit to 5% Add for paid Postage orders Overseas on funds U.S. or Include card number, expiration date, and signature. signature. and date, expiration number, accepted. card Order VISA or Money Include Card Master orders. FPO International and APO by Remit 50% order. add Over total Mexico), For and of Canada order. (includes total f o 25% ail seas add Airm U.S., in Class First Price includes 3rd or 4th Class mail. For Airm ail or or ail Airm For mail. Class 4th or 3rd includes Price Class A or B cabin. Span 4 6 .5 ” , area 30 0 sq. 0 30 area , ” .5 6 4 Span cabin. Jolly. B or A Class rry La design. l ra d e lyh o p erobatic A n f .0sz nie. pae n 1941. in ppeared A engines. .10-size r fo in. 42·.' Span plane. n fu ered pow lectric E 05 McPhee. Jon y B '28. m fro sesquiplane scale Unusual ,04 9 p o w e re d , 3 6 ” span, 2-3chan. 2-3chan. span, ” 6 3 , d re e w o p 9 ,04 Unusual SEND TO MODEL B U ILD E R PLANS SERVICE SERVICE PLANS R E ILD U B MODEL TO SEND A ll Full Sue plam purchased from MODEL BUILDER BUILDER MODEL from purchased plam Sue Full ll A 8 0 X 10335. COSTA MESA. C A L IF O R N IA 92527-0132 IA N R O IF L A C MESA. COSTA 10335. X 0 8 S cas 2 3c. y l Musciano. alt W By 3-ch. r o 2 class. OSA " A " Nats w in n e r i n '40. Wedge-shape fuse, fuse, Wedge-shape '40. n i r e n in w Nats " A " 54 in., 2 ,3 . or 4-ch. R/C . By Stan W ilson. ilson. W Stan By . R/C Span: 4-ch. or . electrics. ,3 2 05 r in., fo 54 itabria C Semi-scale uls aiy n sa. en Shulman. Leon span. in. 2 4 easily, builds M issile-firing, scale Russian attack boat, boat, attack Russian scale issile-firing, M coats FORNI SDNS O 6 SLS AX TA SALES 6% AOO ESIDENTS R IA N R O IF L A C 1 E REIG INSTRUCTIONS ORDERING NEW nc include a reprint o f the construction article, if if article, construction the f o reprint a include nc 7/76 wax. a R E D L I U B 0 L E D O M form block out of blocks of pine out block form f le oe snig be sanding dope, blue of n pyod n pn for pine and plywood in. ct p esaes in newspapers up cut I 7 ---- 983. I esl iy T 718 rprs h San the 78148, reports TX City, versal closing at 12 noon . . . just in time to go to time in . ..just12 atnoon closing new two or one least at entice to able 1938 1940. andbetween contests in Thisfuselage.wasalsoused extensively a squaresimple form to down longeron noe eeySna t h lake. the Sundayat every enjoyed dog! A ACTIVITIESSAM hn /A re lgt eae h rage the became flight free 1/2A when remember can writer This succeeding! is it best The event. and that to strictly Newsletter,” devoted Texaco 1/2A “ beer. acold and ham-on-rye aget 9a.m. and startingal isevery month held contest a monthly Texacomodels, 1/2A club. the in members been have they much so Texaco 1/2A flying 1836 been has Chapter Antonio top the the cabin andbringing removing with floats. The model held numerous numerous records.seaplane held model The floats. with coupled when combination happy very ever going to do. This combination of a of was This combination do. model to going ever the was all that concluded inches six about rising finally ground con flight The first morning. Saturday the right with their hydro modelsthey so modelsthey hydro their with right the No.Photo lOshows California. Southern the from received photos the of some vr 5 i 12 a te ainl. Per Nationals. totaling the entries at 1/2A 350 with in over fifties late the isin it that is idea unique this of part udr Te crin ao bcm a became large Major a needed Scorpion The model rudder. hydro the days was those that in realize didn’t use of most What touchy. extremely were they nufcet ig ra a eog to model. this on enough was up usgive make area wing insufficient down the on landing and wind the into the on circles complete three of sisted my that, With prop. plastic SNAFU late Art Suhr of the early flying days in flying early the of Suhr Art late something we didn't have then. have didn't we something were the days! the were this time? this in them R/C with the smallonly models, for renaissance is coming haps another real cutie! real Kelso Barnet become, sent usNo. Photo aareMajor, all the Scorpion designof by ek oo, vregt oe, and model, overweight motor, weak gas, of severaltanks After leg. wind fine one model old the the Griffith hop to near test out to airport Park Guard went I National and brother anr uc ad Bd Wre on Warren "Bud” and Bunch Danner a’ vrin f fbrls cowling, fiberglass a of version man’s OE NOSTALGIA MORE built the club trainer, and with that. Ithat. and waswith Cyclone, trainer, the club Super abuilt bought Club, Model 1 eitn hs oes Fyay A . "Flybaby” Bowers his depicting 11 rudders, high their Bunch.With Danner rm ae ae, h eoe SM 35 SAM devoted the Baker, Dave from A ABROAD: SAM A 35 ENGLANDSAM— be o er t fycnrl ie Those line. control fly to learn to able To demonstrate the popularity of of popularity the demonstrate To h nwlte poue i called is produced newsletter The by wasdesign the Latersimplified on, es Bre, 0 DGm D. Uni Dr., 107 DeGama Barnet, Kelso models the that note will reader The To show how popular 1/2A Texaco To1/2A hasshow popular how Lockheed the I Soon that, joined after n h poo a b se a early an seen be can photo the In u t eevd nnt mnt tape minute ninety a received Just ’e en okn fr so t use to spot a for looking been I’ve we Hot gone. hardly been noticed, so smoothly has it so smoothly noticed, been hardly Alban Ray with changes several gone h od ie eet a te ME Na SMAE the at events timer old The v o lu n te e r d ra fts m e n : the most most the : n e m fts ra d r e te n lu o v on SAM. to join looking are boys SMAE the good so insurance coverage developed excellent 35mem SAM for and arrangement event buying an has who Knight Don set prizes; up a providing bulk Juniors the for propagandist Wiggs.areal Allen too: h cnrr, h ddctd a that man dedicated the contrary, the has offices in changeover the case, Ineach is infamous. background whose Vic and chairman as down stepping iia t te A "en ed” Of Feed.” recent the at on "Bean went this of SAM all course, the to similar is quite which on is put a barbecue time tent a this During literally overnight. erected being city with fun still are tionals Englishcontests SAM yet. the to gotten hs s nte SM 5 eei ta is that benefit 35 SAM another isThis w riter up to date on the old timer timer old the on date to up riter w he brings this wherein editor, newsletter y tvn an wo isl i i an in is himself who Payne Steven by improved to the point where you don’t don’t you where point the to improved is Davego Baker.makes things really As Holcomb Tony by replaced been has aspaperwork for qualified be eminently successful in getting Bob Copland, Copland, Bob getting in successful prom inent being Terry King, Brian Brian King, etc. Ridley,Just tremendous! Terry Derek Havis, John being Yearly, inent many by prom enlarged constantly being cost. nominal at available made being apnns n ereOd England. Olde Merrie in happenings upper bracket insurance company. It is It company. insurance bracket upper the is benefits best the of One bers. and appreciation of the other fellow’s fellow’s other the of appreciation and eda 0-at ap ora i”. it” read to lamp 500-watta need has "It newsletter, the saysDave about time. more him allows retirement appears Vic to place. his taking Dubery were well known after WW-II for their for WW-II after known well Harrier, were the of designer chief former 30. 28, 29 May and Natson F/F eiu cmeios net on intent competitors serious models. of variety the is competitions copies planswith of hasBaker library a oehr ae ser o fr nostalgia for joy sheer a are togethers only. This is no doubt due to the lack of of lack the to due doubt no is This model. back to models. Copland andhis Copland models. backcronies to One can’t say he don't try to win them them win to try don't say he can’t One Mario a Cruiser. Shereshaw flyer, Cloud flight. official 1939 an on design original Wakefield Parkham’s Reg shows back! 35 events. SAM for trophies perpetual to has been main the contributors of one fine latest his depicting 13 No. Photo as Gandolphi seena Mario in run shotof been have Parkham Reg and Copland Placed second after all these years! these all after Placedsecond 12 No. Photo fold. the in back brought There are others that make SAM 35go There that areothers The former treasurer, Pete Michelle, Michelle, Pete treasurer, former The At present, the "hot dogs” haven’t haven’t dogs” "hot the present, At Of course, despite his deprecation to hisdeprecation despite course, Of hasunder organization the First off, SAM 35 through the auspicesDave the of 35SAM through As mentioned before, Baker has before, been Asmentioned One notable thing about the English the about thing notable One We would also be remiss if we didn’t didn’t we remissif be also would We In that line, many old timers like Bob like timers old many line, that In At present, the English get- get- English the present, At MODEL BUILDER MODEL winning Ace R/C, Inc...... 91 INDEX TO ADVERTISERS Prop Shop, The...... 78 Astro F lig h t...... 79 Radio Controlled Models...... 84 Bavarian Precision Products...... 87 Satellite C ity...... 1 Beehive R/C Model Aircraft Co...... 67 Scan Am International...... 81 Dave Brown P roducts...... 71 J-5 Enterprises...... 70 Sig Manufacturing Co., Inc...... 4.5 Byron Originals ...... Cover 2 K&B Manufacturing...... 62 Francis Smith's Ship Yard...... 85 Bud Caddell Plans...... 74 Kimbrough Products...... 72 SR Batteries...... 80 Campbell's Custom Kits ...... 82 K&S Engineering...... 87 St. Croix...... 88 K ra ftS yste m s...... Cover 3 Cannon R/C S ystem s...... 67 Super Cyclone Engines...... 95 Kustom Kraftsmanship...... 64 ...... 76 Tatone Products...... 84 Jim Crocket R e p lica s...... Lehmberg Enterprises...... 94 Taylor-Craft ...... 78 D&L Trading Post ...... 79 Leisure Electronics...... 73 Top Flite...... 68 Davey Systems C orp...... 83 McDaniel R/C Service...... 76 Uber Skiver...... 92 Du-Bro Products...... 63 Midway M od el...... 64 VL Products...... 83 Delta Manufacturing...... 82 Midwest Model S u p p ly ...... 93 Buzz Waltz...... 72 Electronic Model Systems...... 68 Walt Mooney...... 90 Westburg Plans ...... 89 Enya Model Products...... Cover 4 Sid Morgan Vintage P la n s ...... 71 Williams Bros...... 66 F A.I. Model Supply...... 65 Novak Electronics...... 75 Wilshire Model Center...... 86 Fox Manufacturing Co...... 74 Nowlen Aero ...... 81 NickZiroli ...... 73 Futaba ...... 3 Octura Models ...... 69 Dick Hanson ...... 84 Peck Polymers...... 75 HOUSE ADS Hobby H o rn ...... 80 Pioneer Research...... 70 Modeler's Choice...... 93 Hobbypoxy P ro d u c ts ...... 77 John Pond O.T Plans...... 90,93 Binders ...... 88 Ikon N 'W s t...... 69 P ow erm ax...... 65 Full-size Plans...... 96 Indoor Model S upply ...... 62 Proctor E nterprises...... 86 Limited Edition Prints...... 99 CLASSIFIED ADS P-30 CONTEST model plans Can do two IMPORTANT INSTRUCTIONS: Non-commercial (personal items) rate is 25 cents per word, minutes in calm air Rolled tube fuselage with a minimum of $3.00. Commercial rateis40 cents per word, with a minimum of $5.00. $3 75 Postpaid P-30 Werks, 1715 Knoll- No advertising agency discounts allowed. wood. Apt P-4. Kalamazoo Ml 49007 Name and address free, phone number counts as two words, abbreviations count as whole words and w ill be spelled out. All ads are payable with order, and may be for any consecutive insertion period specified. Send ad payment to: MODEL BUILDER, Classified Ads, P.O. Box 10335, Costa Mesa, CA FACTORY SALE Ras Stik 25-40 fun flier. 51 - 92627-0132. inch foam wmg. balsa fuselage Sale price $24 95 or with two rolls Econokote (colors red or white only) Fox 36RC »23900. core glue, fuel tank, wheels, motor mount S79 95 CANOPIES, MAJOR BRAND, first quality, WANTED — OLD MODEL ignition engines Only 12 left Handling charge $3 00, add assorted sizes, styles Five lor $5.00. 12 tor cars etc Paying top dollar Bill Simpson 7413 $2 00 for C O D GT Models. P.O Box 869 $9.00 Add $1.00 shipping Large quantity Via Lorado. Rancho Palos Verdes. CA 90274 Rantoul. IL 61866 phone (217) 893-4136 inquiries invited Charge cards Stanton, 4734 (213) 377-3532 Milwaukee. Chicago, IL 60630 WANTED Factory accessory variable com BASIC AERODYNAMICS (booklet) Explains pression head tor Drone diesel Also want two seldom understood aircraft design points second-model ball bearing Drone diesels PAW DIESELS England's finest, now Clear, simple, inexpensive Postage paid available at low low prices 049 to 29 Will buy or trade original Burgess UPF-7 U / C $2.50 Jule Dews. 7703 Baltimore National standard and R/C. Send $1 lor list Eric kit used with M-5 Robert O Knutson. PO Pike, Frederick. MD 21701 Clutton. 3816 DeSoto Ave Fort Meyers. FL Box 243. Austin. MN 55912 33905 MODEL AIRPLANES AND THE AMERICAN BOY Magazine reprints of 1927-34 era, 160 BOOMERANGS — Handcrafted and hand- ROTARY ENGINED AND WW-I FIGHTERS. pages Photos and plans Heritage you decorated Throwing instructions included Factory or best-source drawing enlarge should know " $950 postpaid (SASE for Keep one in your field box for after the plane ments Experienced scratch builders only. INDEX.) Model Aero Publications. Box 135. crash'” $7 00 postage paid Denis Hentzy. 72-inch span $26. 80-inch span $36 Photo Northridge, CA 91328 PO Box 16. Townline. NY 14165 packs 500 aircraft. Catalog $3 Scale Plans and Photo Service. 3209 Madison Ave.. Greensboro, NC 27403. PEANUT PLANS Unusual sub|ects: Air- cruiser. Sportavia, Taube Sample $1, SASE NORTHROP N9M FLYING WING Scale for list David Aronstein, 50 Pasture Lane plans photos Send $1 00 for information Bill Poughkeepsie, NY 12603 Young. 8106 Teesdale Ave. N Hollywood. RAZOR BLADES, single edge industrial lirsl CA 91605 quality — extra sharp. 100/$4 25.200/$8 00. 300/$ 11 75, 500/$ 19 25. 1000/$37 50. WANTED MODEL DIESEL ENGINES circa postpaid in U S Cobbies Gitts. Postbox 2. '40s through '60s Prefer complete, running FOR SALE — Old ignition engines (50 plus), Deal. NJ 07223; (201) 531 -6842 engines Others bought for parts. Stale condition and price in letter Philip Mahony. complete Numerous parts engines; 40 glow engines. New Lindberg Hornets built by Cole, RR1. Box 223. Lime Rock, CT 06039 version featured in Model Builder June '83. TISSUE PAPER (Domestic) 20"x30" sheets, page 36 Engines listed singularly For nineteen colors. 20C sheet S.A.S.E. brings complete list and prices, send $2 00 and sample of all colors Contact Bill Wilson, Box LATEST PEANUT PLAN French Bloch MB legal-size SASE William A Cole 4978 NE 8489, Lumberton. TX 77711,(713) 246-4177 152. $2 50 postpaid SASE for list David Diels. 56th St.. Altoona IA 50009 Box 101 Woodville, OH 43469 WANTED Spark ignition model airplane WILL PAY to $200 for Forster 99s and "PLANES. CARS. SHIPS - I wish to ex motors parts race cars Circa 1930-1950 Anderson Spitfires David Bogdanyi, 8615 change models Libor Gaidacek. G Kli- Russell Stokes. Rt t Box 520 Keller TX Lindley Ave . Northridge. CA 91324, (213) menta 4. Havířov Mesto. Czechoslovakia 76248 885-8324 73601 OCTOBER 1983 97 maker and draftsman for Paul Lindberg ing the next year’s Annual SAM 21 West club acivities. Northern Heights Gala at models, has been suffering from heart Coast Champs featuring low-wings. Fairey Airdome in particular. Those Being publicized one year in advance, were great days, and we are looking seizures, near blindness, loss of a critical finger, overweight, and underpaid. His opinions were solicited from the various forward to quite a few of the former club wife decided to return to Chicago when other SAM Chapters. members like Ken Tansley and C liff she inherited an old apartment building. Under the proposed contest arrange Buston to get things rolling again. Actually, the old gang never broke up, Leon is now on the road as a wanderer ment, all low-wing models would re only in regards to flying, as they were living out of the back of his beat-up ceive a 50 percent bonus on their flight able to keep contacts at the local meet- station wagon with his faithful, blind times. For instance, if you make a four- ing house. This revival of old time dog. Some world! minute flight, 50 percent more would contestants has resulted in the unearth Gordon also says this reminds him of give a total of six minutes. The limiting ing of many old designs that were the time when William Wylam turned up factor of course, would be the amount considered lost. at the North American Downey, Cali of a "max" flight. fornia plant where the Apollo was being As it stands right now, number two Baker reports that with the exception of Alman, who passed away the first of built. Near blind, penniless, wife in San son. Gary Pond, has donated a huge this year, the entire 1936 Wakefield team Francisco, he found the going tough, perpetual sweepstakes trophy for low- that came to the USA is still intact and when some nice young man in person wings, plus large, individual perpetual back in "harness” so to speak. Great nel figured him for a bum. didn’t want to trophies by Wallock for each class. This stuff! hire him because Bill lacked a degree in should make things worthwhile as a Peruvian Underwater Basket Weaving or permanent trophy will also be awarded. AUSTRALIA some such nonsense. With one low-wing model, a competitor Latest letter from Monty Tyrrell states My boss heard about it, called his could end up winning three trophies in he was the guest speaker at his club superior, and as we were modelers, we one class! How about that?! meeting with the subject as SAM. Tyrrell naturally hired William Wylam for old For those doubting Thomases who reports he had a splendid attendance, time’s sake. Each of us took turns invit think low-wing models can’t perform, and spoke for over an hour. ing him to honor us with his presence the columnist lists the following low- One of the Australian SAM spark for lunch, dinner, stay over night, etc., wing designs that are available (and do plugs. Dennis Parker, attended and was as he was broke . . . at least until his first fly!): duly impressed by Tyrrell’s demonstra paycheck. He stayed at N.A. for about a NAME (Designer) SPAN (Inches) tion with his Baby Barnstormer (1948 month and wandered away. Last we hard Dragonfly (Williams) 85 K&B ignition). Also of interest at the was a postcard from San Francisco. He Golden Eagle (Comet) “ Show and Tell” was Dave’s big Power has gone to see his wife, deciding he (low-wing version) 45 house with an Anderson Spitfire on didn’t like aerospace work! He had no Gull L.W. (Bowden) 96 ignition, and Norman Garrett’s Air Trails files, no reference material, carried Loew LW I 66 Sportster, with a glow OS 15 for power. everything in his head, and was also Loew LW II 72 Dennis Parker also brought his Forster 29 going deaf as well as blind. Wotta waste! Monarch (Hamley) 82 powered Pacific Ace. SAM CHAPTER Morio (Guillemard) 48 To add spice to the display, Monty also This columnist has been receiving a lot Panther (Peerless) 46 displayed his complete collection of of requests on how to form a SAM Pacemaker (Saddler) 78 Ohlsson motors including one of Herb Chapter. As the SAM Secretary-Trea Petrol L.W. 44 (Bowden) 96 Wahl’s new Ohlsson Gold Seals. For the surer. this is to advise all prospective Starliner (Atwood) 55 collectors, he also showed a Marden 23 organizers that all you need is five Speedcraft (Orwick) 63 ignition made locally 40 years ago. modelers with SAM membership in Sykes L.W. 66 Superficially, it resembles an Ohlsson good standing. This is thirteen for a starter! There are 23. If you are having troubles, member other low-wing designs that can be Although they were invited, the free ships are $10.00 per year (a real bargain!) drawn up if the demand warrants. The flighters (with the exception of Dennis and can be obtained from the SAM best part about low wing designs are Parker) did not show. Truly a shame as Secretary-Treasurer, John Pond, 4269 their flight characteristics, good! At they missed a magnificent chance to Sayoko Cir., San Jose, CA 95136. Once 1.000 feet you can’t tell the difference gain converts for O/T Free Flight. you have enough members to start a between a low-wing and a high-wing READERS WRITE chapter, you then write to Everett model. Try it, you’ll like it. Ever so often one of the members of Woodman, 233 Longview Dr., Bayville, THE WRAP-UP an active SAM Chapter will move away NJ 08721. He will immediately issue you a Newt Stansfield sent in an old letter to an area where Old Timer flying is chapter charter and number. head from the Razorback Gas Model non-existant. Such is the case of Chuck In some cases, some fellows like to Association that struck a responsive Provance, former member of the have distinctive names like the Cali chord with this columnist. SCAMPS. SAM Chapter 13 in Southern fornia 49’ers, the Philadelphia 76’ers, What I would like to do is to run a California. and the San Antonio Club, SAM 1836 reduced copy of the letterhead section Chuck now writes from Wyoming to (remember the Alamo!). A special num as one of the illustrationsof this column. say flying areas are great but there are ber can be requested, as long as some This could possibly lead to having darn few modelers around. He sends in one else didn’t ask for it first. In any interested clubs send in their novel Photo No. 14 showing his English P.A.W. respect, once you form a chapter, the letterheads for publication. 2.46 diesel engine in a Paul Plecan good times really roll then! Realizing there is a terrific amount of Simplex. At the time the photo was LOW-WING CONTEST old club literature, this should be no taken, there was still snow around so we For years this columnist has been problem for anyone wishing to see his have no reports on the model's flying listening to complaints that the same old club’s logo in print. characteristics. Bet it’ll be a winner! models win all the time. His friend, Gene Now if we can just get Bill Northrop to SAD NEWS Wallock, has also been aware of the go along with this nostalgic idea (I think I guess that's about the only way you growing sentiment, and has proposed a we can twist his arm a little! wrf). we are can title the news from Gordon Codding, low-wing contest. Gene has gone so far all set. Regardless, fellows.send them in, but, as many who shrug their shoulders as to put up perpetual trophies if any we’ll work something out. say. “ That's life.” thing develops. Next issue we will try to run as many Gordon reports the local Arizona This columnist has seized upon this photos as we can of the SAM Champs at club lost another member, not any opportunity to announce an O/T R/C La Junta. This meet promises to be a thing fatal, but just plain family prob contest featuring low-wing models. At "biggie” with over 100 registrants 45 lems and poverty. Leon Tefft, formerly the recent West Coast SAM Champs, a days before the meet starts. Great of Chicago and one-time master pattern sample flyer was distributed announc stuff! · 98 MODEL BUILDER his is one of o series of limited edition the artist, and accompanied by a certificate of collector prints to be produced from pointings authenticity. Prints rolled and shipped in sturdy by artist Bob Benjamin, most of which hove first tube, UPS insured, ready for professional appeared publicly on the cover of MODEL mounting and framing. BUILDER Magazine. Prints uuill be allocated based on postmarked Only 500 prints are available, each per date of order. Checks received after 500th print sonally inspected, signed, and numbered by is sold will be returned uncashed. 1 To be filled in by PRINT ORDER FORM Send check to: MODEL BUILDER MAGAZINE M O D E L BUILDER Attention: LIMITED EDITION PRINTS Box 10335. C O STA M ESA. CA 92627 PRINT NO. . PLEASE SHIP ME A LIMITED EDITION LITHO PRINT OF ROBT. A. BENJAMIN'S Please indicate in numerical PAINTING OF HAROLD KRIER'S GREAT LAKES SPECIAL. A CHECK OR MONEY order your preference for the ORDER FOR $50.00 PLUS $5.00 FOR SHIPPING AND HANDLING IS ENCLOSED. nex t limited edition prin t Please Print! NAME ______STREET O j-3 C u b □ P-43 O F ran klin Sport C ITY , S TA TE, ZIP □ Waco YKS-7 CD Monocoupe Clip this coupon or make a copy case of a bottle-tank) comes through the firewall. The former method is most always used, and the ways of accom plishing it are varied. NOW The quickest . . . and dirtiest . . . is to Eliminates drilling hole in prop & 6 bolt simply drill a hole the size of the fuel AVAILABLE tube and shove it on through. However, no matter how snug the fit, fuel and exhaust residue will filter on through. Single-bolt prop And when it comes time to replace the tubing, you better use the same size adaptor for the new material. I prefer to use short lengths of brass tubing, epoxied in place. The fuel 50cc Quadra, and the line is then installed in two parts,oneon Webra “Bully” 3.5. each side of the bulkhead. Ron Weiss, Huntington, New York Send $1 50 postage suggests a variation of my method. He J & J Model Accessories, 2020-3 Lomita Blvd., Lomita, Calif. 90717 installs the brass tubing in the firewall by Phone: (213) 534-3400 soldering keeper washers on each side. This seems OK, but I’d still prefer to seal in the USA. However, Congress did N O T the firewall area where the tubing goes Workbench ____ Continued from page 6 make the metric system obligatory. through with silicone rubber. Figure 1. Apparently the people at that time were Fourmost Racing Products makes a more familiar with the inch-pound handy molded gadget that does the Harry obtained photos and a non- same job. It is fed through the firewall detailed three-view from the Wichita based on English practice. Back to the Merlin engines .. . if I and held in place by a nut. Fuel line slips division of Boeing, but is hoping to find on each end, and the raised "neck” photos of details, interior, tail wheel remember correctly the Packard was the "inch” model and the RR was the metric helps to keep it there. assembly, etc., color scheme, more CZECH PEN PAL detailed drawings, and a reasonable model. My memory is very good but a bit on the short side. Libor Gajdacek, G. Klimenta 4, Havi- explanation for the upside down stab! rox Mesto, Czechoslovakia 73601, wishes Also looking for more information is Regards, john R. Walker P.S. I have two drafting books on the to exchange plane, car, and ship models Thomas Ailes, 630 Old Forge Rd., Val and information with U.S. modelers, paraiso, IN 46383. He remembers a market. One is a metric version, the other is English measures. They are according to Zuzana Jašek, of Burnaby, rudder-only R/C model from Air Trails British Columbia, Canada. We have to back around 1960 called the “ Pixie identical. The English version outsells the metric version by about ten to one. assume that he can write in English. Biplane” , and is lookingfor plans. Tom is THE WINNERS! really into old time R/C models. He has a FUEL THROUGH The following announcement comes Technical Models "W ildfire” , Midwest Every power modeler sooner or later from S.O.A.R., the Silent Order of Aero- "Esquire” (has built over two dozen!), a is faced with the problem of feeding fuel modeling by Radio, Plainfield, Illinois: Cuillow “ Vanguard” , and a deBolt through the firewall from the tank to the The team of Ken Bates, Ken Show, Livewire "Kitten.” Future projects in carburetor. Basically it comes down to Mike McIntyre, Kurt Emerling, and clude a Veco "Smog Hog” , Berkeley two methods: run tubing through the Mike Bak outdistanced 27 other teams to “ Sea Cat” , and hopefully, a Super firewall, or place the tank so that the win the annual sailplane classic, Esquire. He has kits for the Smog Hog pick-up tube or the whole cap (in the S.O.A.R.’s Great Race VIII. The winning and Sea Cat! Let us know if you can help team completed the course in 3 hours 32 him with the Pixie, or contact him minutes and was the only team to finish directly. the grueling 47.2 miles/76 kilometer METRIC MUDDLE course. It was also the second time in Our comments about metrics in the two years the MRCS flew the complete August issue brought the following from course. John Walker, Charlottesville, Virginia, Second place went to the Suburban an occasional construction article con Aero Club of Illinois with 26.7 miles/ tributor to Model Builder: 42.6 kilometers in a time of 3 hours 18 Dear Bill, minutes. Third place was won by the I have been meaning to write con DCRC of Washington, D.C., with 22.2 cerning a thing or two but never can miles/35.7 kilometers. seem to get around to it. However, your Twenty-three teams, representing 12 8/83 editorial on metrics was the states, Canada, and Switzerland com '‘nudge’’. peted. About metrics and the U.S. Back The new R/C frequencies were put to around ’42 or '43,1 was working (or the test as all new channels were in use for AAF. As aircraft with both the RR Merlin the four day event. No irregularities due and Packard Merlin engines were com to interference were noted. ing in (or work, we were given a "crash The Great Race is a cross-country course" in metrics. We were told that radio controlled sailplane event and is metrics were (was?) just around the open to competitors from any national corner. The USA was the only major aeroclub. S.O.A.R. has been hosting this country that hadn't made it official. . . competition since 1976. but it would in a month or two, or YOU BETCHA! perhaps a year or two. We’re still waiting. The following quote was sent to us by Did you know? More than WO years John Walker, ref. "M etric Muddle” , ago a federal law was passed that said in and I’m almost sure it sums up the way I part .. . "It shall be lawful throughout try to write my columns. the United States to employ the weights “ Never use big words, or you’ll obfus and measures of the metric system. . .’’ cate the significance of what you’re This law made the metric system legal endeavoring to communicate.” · 100 MODEL BUILDER ?-s. αα . · of instruction all existing and the II I (0 be sure that nothing int smooth, responsive control and high technology timen! he w ill feel wfr \ single integrated circuit encoder nd clean strong signals finally lands. You're confident he's using the best avail ■> to the highly sensitive, interference resistant and com- able equipment; a reliable K-line pad receiver. Our standard K-line series radio from Kraft Systems. servos deserve special mention. 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