MARCH* 1973 85 cents volume 3, number 16

*combined with FEBRUARY CARL GOLDBERG The Solid Evidence on C G RETRACTS

Now after more than a year's use by thousands of grass a lot, and by March I was modelers, we'll bring you each month solid evidence putting in 7 or 8 flights practically on CG Retracts. Proof of dependability and every evening and, of course, more durability. How they carry heavy airplanes working on weekends. Flew in 20 contests off of grass fields and last for hundreds of flights. and w o n 6, including first in C-Ex- Practical and almost service-free, they work for experts and average flyers—and they'll work for you! pert at the Winter Nationals. My For instance, read what Phoenix 5 now has made more hun­ „ _ nationally known expert dreds of flights than you would flyer Dave Brown says: believe (125 gallons of fuel!), and the I chose CG Retracts over gear has given no trouble of any kind. others because of 3 fac­ I've never even taken it out of the tors: (1) Reliability, (2) plane. That's what I call good Longevity, and (3) performance. Economy. Installed the Dave B row n gear January 1972, using one World Engines S-5 TWIN GEAR R etracts—RG2—$14.95 Retract servo to work all TRI-GEAR Retracts-RG3—$24.95 NOSE GEAR (O n ly )-R G 1-$10.00 3 units. I fly off of rough

UNIQUE SNAP-LINK! Patent Pending. Now for the first 5/32" ADJUSTABLE AXLE tim e-you can buy a truly safe link—the SNAP-Link! Adjustable axle allows you to • Tiny 45° shoulder snaps through arm, prevents acci­ easily have the strut length you dental opening. So unique it’s Patent Pending! want. Both the axle and screw • One-piece design—no separate pieces that might are hardened steel. Just file a SNAP OVEI {NO comeapart. Snap-Link, Regular, with rod SL1) . . flat on the strut, and tighten Mini-Snap-Link, with rod MS1) 3 ie a axle in place. AA1 75« ea. SNAP'R KEEPER Snap-Link SL2 or Mini-Snap MS2 , Quickest, handiest way to secure pushrod wire end less rod 2 for 40$ STEERABLE NOSE GEAR to servos, horns, etc. Works on wire Xa to X·" diam­ Versatile — steering arm can be to eter. SKI 50$ for 4. either side, or slightly up or down, REPLACEMENT FOAM WINGS, ETC. or mounted on bottom with extra To go with your own design fuselage. Proven efficient collar in slot. Steering arm is nylon, Ranger 42 foam wing gets you in the air quickly — stiff enough for good control, yet can $3.95. Stab and verti­ flex under shock to protect servo. cal fin, set $1.95. Collar is hardened steel —won’t strip Assembled Ranger 42 like brass. Screw is hardened steel, fuselage, plus bear­ too. You can really torque it and get ers, nosegear, etc., good grip on music wire strut with­ $9.95. out a flat. Complete steerable nose gear with nylon bearing, V u" plated music wire strut, extra collar, blind nuts, screws AILERON BELLCRANK NEW-MAJOR R/C FITTINGS SETS and washers G16N $2.50. Bellcrank has steel bushing Here’s the economical way to buy the major fittings of proper size, so crank can for your multi-ship. In one set, you get all the horns, NYLON STEERING ARM be screwed firmly in place links, keepers, bellcranks, or strip aileron linkage, Hardened steel collar NON-JQUifZf without binding. No electri- and hinge material—and at a saving. and screw SA1 75$. smimsHnc cal noise—all metal parts are R/C Fittings Set No. 1 for ship with screwed tightly together— standard ailerons. RFS1 $3.50 AB1 50$ for 2. NYLON BEARING R/C Fittings Set No. 2 for ship with V i A BELLCRANK and HORN strip ailerons. RFS2 $3.50 One-piece design mounts to firewall without alignment problems. Includes Made of nylon, this new set pro­ blind nuts, screws and washers NB1 75$. vides smooth ViA control line op­ KLETTPUSHROD eration. Easy on dacron lines, too NEW! EXIT GUIDES CONTROL HORNS BCH1 25$. Our new horns have the upright part To protect your fuselage and insure smooth operation of rising from the center of the base for your pushrods. Precision made of tough nylon. Easy in­ maximum stability. Holes are right stallation. Large for 5/64" wire, small tor 1/16" wire. size for W wire: nut plate for sim­ 92 X 9/f #« x »/» PEG ! LARGE 4per pkg. 75« plest mounting. Long horns CHI or SHEET METAL SCREWS PEG-2 SMALL 4 per pkg. 75« short horns CH2 , with screws—500/2. Like wood screws, but better. Sharp, clean, full-depth threads, hard and strong. Excellent for mounting NYLON REINFORCING TAPE servos, etc. Includes washers—s2 x Xi SMS2 30$ for This nylon reinforcing tape is ex­ 10; *4 x % SMS4 30$ for 8. tremely tough when applied with P.S. For best service, see your dealer for items you KLETT HINGES- epoxy around the center when join­ ing wing halves. 2 V i" wide x 5 ft — want If not available, write direct: add 50$ per item WORLD'S FINEST! N2 50$. % " wide x 5 ft. N1 25$. ($1 outside U.S.). Minimum order $1. Designed and manufactured by Roy Klett, originator of MANUFACTURERS—All our accessories are available world-famous RK hinges. An exclusive with Carl Gold­ NEW KLETT SAFETY DRIVER at excellent O.E.M. bulk prices. berg, these hinges are made with exceptional care and SOCKETS DOWN ONTO SCREW Γ Carl Goldberg Models Inc. attention to detail. The small RK2 hinges are so thin all HEAD-CAN'T SLIP OFF AND DAMAGE YOUR WING! I 2546 W. Cermak Rd., Chicago, III. 60608 you need is a knife slit. The regular size RK3 hinges are \V\! I am sending 25$ for 8 pg. Illustrated Cata- the slickest you've ever seen - try holding one leaf and Takes Round Head Screws and ;\aVe ! log With, "Recommendations In Starting in waving the other! And both have removable music wire Binder Head. Ν'*-»6* ■ R/C," Basic Explanation of R/C Equipment pins. Ask your dealer for the best - Klett hinges. KLETT SAFETY DRIVER Ο®"4 I and Radio Control Definitions. RK2-7 7 for SI .10 RK2-15 15 for S1.95 For W Nylon Screws SD1i oar· ea Name___ For # 1 0 Nylon Screws SD2 I RK3-7 7 for S I.25 RK3-15 15 for S2.35 Address, MODELS INC. City____ CARL GOLDBEI State___ _Zip___ 2546 WEST CERMAK ROAD CHICAGO. ILLINOIS 60608 ONLY MULTICON OFFERS A RUGGED, HEAVY DUTY, RELIABLE AND LONG LASTING RETRACTABLE LANDING GEAR SYSTEM WITH FACTORY SERVICE AVAILABLE

• Rugged and light · Extra Servos or Battery • Positive locking Packs not required • Self-contained · Very simple to install

Simplicity of installation and long trouble-free life are the key­ may even be operated from a four channel receiver if desired. notes of the Multicon retractable landing gear system. Molded Landing gears are furnished completely wired with connectors. from high strength glass fiber reinforced nylon, it is virtually Since extra servos are not required, the system is very com­ indestructible and fuel proof. Because it is self-contained, com­ petitive in price with the less satisfactory mechanical units. plicated actuating linkages and extra servos are avoided. The PRICES units can be mounted either vertically o.r horizontally. Gear legs Complete System (wired with LG-47 Amplifier) ...... $ 99.95 are removable and may be bent to the desired length. The posi­ Complete System (wired with LG-51 Amplifier) ...... 109.95 tive locking mechanism is the most positive and strongest Set of three (one nose gear, two main gear)...... 72.95 available. Individual Gear ...... 24.95 Specially designed amplifiers permit direct operation from the LG-51 Amplifier for 4 channel systems ...... 39.95 receiver without the necessity of extra batteries. The system LG-47 Amplifier for 5 and 6 channel systems...... 29.95

______- 1 K r a f t 450 WEST CALIFORNIA AVENUE, VISTA, CALIFORNIA 92083 World's Largest Manufacturer of Proportional R/C Equipment

» ° KADET THE IDEAL R/C TRAINER FOR .19·.29 ENGINES UP TO 3 CHANNEL RA0I0 EQUIPMENT LENGTH: 42” *2385 EASY TO BUILD Sturdy, built-up balsa construction and light wing load­ WING SPAN: 57” ing combine in the Kadet to produce a perfect sport WEIGHT: 4 LBS. or beginners’ model. The flying performance of the high-lift, flat-bottomed airfoil is responsive to control SIG and inherently stable. A tricycle landing gear helps KIT R C-31 ground handling, take-off and landing characteristics. Handy Printed Fuselage Sides — Build In­ We predict that this compact bundle of dynamite will ternal Structure Directly On the Wood. quickly become THE standard RC Trainer. Molded Plastic Engine Cowling. Formed Nose Gear with Shock-Absorbing Coil. Torsion Bar Main Gear. Hardware Package Includes Nylon Nose Gear Bearing, Nylon Control Homs and Molded Nylon Surface Hinges. Die-Cut Plywood and Balsa Parts. Top Quality Balsa and Hardwood. Designed by CLAUDE McCULLOUGH Full Size Plans. Complete Illustrated Building and Flying Instructions.

The MODEL BUILDER 1 Dr. Ralph Brooke says,

"Every doctor should have copies of The MODEL BUILDER in his recep­ tion room . . . That way, his patients won't mind waiting if he happens to be out flying models during office hours!"

UILDER 12552 DEL REY DRIVE SANTA ANA CALIFORNIA 92705 The MODEL BUILDER is published monthly. Regular sub­ scription rates are S8.25 for one year and $14.00 for two years. Add $2.00 per year for subscriptions outside of U.S. and Canada. Add $1.50 per year for Canada and Mexico. Please enclose check or money order. Do not send cash.

Name ______

A d d re s s ______C i t y ------

S t a t e ------Zip ------( ) One year at $8.25 ( ) Two years at $14.00 Begin w ith ______Issue

___ cast aluminum ENGINE MOUNTS Engines run smoother and cooler on Tatone Engine Mounts. The cast aluminum absorbs engine heat and provides a solid support for better engine performance. Tatone mounts are one piece and easy to install and are most often specified on magazine plans and In kits. For your convience, we make a mount for 98% of all engines made and always in stock.

I/2A Short or Long — $1.75 .09 Short only 2.25 Engine mount for .15 Short or Long — 2.25 K & 6 .15 Series' 73 .19 Shorr or Long — . 2.25 S2.50 . 29-.*»0 Short or Long — 2.50 TORKY 1/2 A PROTO (PROFILE) . 1*5“ · 59 Medium only 3.00 A/C PYLON M U N T .*i0RV Long only 3.00 for .40R9 engines .60 Short only Custom made k it - balsa/hardwood. Tank •60RV Long only Koum, rear and landing gear assembly completely fin nut plate, NOTE: Specify engine, mode I a ll Mounting ished1 No drilling or soldering required! All number And displacement. Λ hardware incl. necessary hardware included.. We w ill d rill mount for your o n ly TATONE PRODUCTS engine at no extra charge if 4 4.9 5 iaoa GENEVA AVE requested, undrilled otherwise. BAN FRANCISCO. CA. 9411? PRICE: S10.50 Postpaid) Send check «*r nmne\ order No C .0 .1). av.iil.ihle. Mail order on!\

PISTON/ROD RESET TOOL For Tee Dee .049 or .051

BENEFITS: 1. Assures peak engine perform­ ance. 2. E xtend s engine life. 3. Eliminates the possibility of breaking crankshaft when en­ gine is run at high RPM.

To ol m ade from hardened steel

KIRN-KRAFT SEND 10C FOR LIST OF P.O. BOX 224 OTHER 1/2A ITEMS ANAHEIM, CALIF. 92805

2 The MODEL BUILDER The MARCH

1973

volume 3, number 16

^Combined with February

STAFF CONTENTS FEATURES EDITOR

Win. C. Norlhrop, ) r. WORK.bl.NCH, Bill N o r t h r o p ...... 4 GENERAL MANAGER Anila Norihrop OVER THE COUNTER, Bill N o rth rop ...... 5

E D IT O R IA L a s s i s t a n t Lo Gray RADIO CON I ROE RI.POR I , F rank S chw artz ...... | 3 SECRE TAR Y Bobbie1 Eylor CON I ROE LINE, D ic k M a t h is ...... 18

CIRCULATION MANAGER bill Phillips PRODUCTS IN USE, B ill N o r t h r o p ...... 20 CONTRIBUTORS I REE FLIGHT, T o m H u t c h in s o n ...... 2 6

bill I Finnan H ANN A N 'S 11ANG AR, B ill H an n a n ...... 3() Tom I luichinson

Diek Maihis SCALE I I , Fernando Ramos ------...... - - - 34 Wall Monncv F / F A I , A i V e la - - - ...... 37 I či n.indo K anios

I rank Sthw aii/ R/C SOARING, Le Gray ...... 3$ Jack Tran sue PLUG SPARKS, Jack Tran sue...... — ...... 41 ΛI Vela

ADVERTISING REPRESENTATIVES S I RICH V SAIL, R o d C a r r ...... 42 EAST Auke Venema. 79 Adirondack Ave S poisw ood, N J 08 884 SCALE VIEWS (2 0 1 > 251 2800 C O N SO LID ATED PT 3, H a l O s b o r n e ...... 43 WEST Boll Upton. 20G26 Clarendon Ave Woodland Hills, California, 91364 <2131 88 3 7G81 CONSTRUCTION

Subscriptions $8 25 per year, S14 00 two bEANPA 1CH, B o b U p t o n ...... 8 years Single copies 85 cents, Add S2.00 for CO R S ΛI R 1 ‘ F 4 U /C ” , JackSheeks--- ...... j g postage per year outside of US (Except APO) Arid $1 50 for Canada and Mexico. SATAN MK. Ill, 80b B e e c r o f t ...... 22 Copyright 1973 The MODEL BUILDER All I LAPPER, H a l C o v e r ...... 2 l) rights reserved Reproductions without per PEANUT I RAVELAIR, D o n B u t m a n ...... 31 mission prohibited. Published Monthly by The MODEL BUILD ER Magazine, 12552 Del Rey Dr., Santa Ana, Cover. Lake Elsinore, California forms the background for this superb shot by modeler and professional photog apher. Chuck Col ell. The Mark's Models Wind ree was Calif 92705 Phone (714) 544 1321 suspended on fine monofilament line rather than shot in passing, in order to stop Second Class postage paid at Santa Ana, Ca the lens down for extreme depth of field. We coulda fooled ya though. Right?

The MODEL BUILDER 3 One of these days . . . ! Our 3 inch-to-the-foot C-3 Airknocker is still under construction after more than four years since it was started. Maybe this year . . .

-from Be ii

EXCUSES. EXCUSES ready by AMA). 7 dollars less, wouldn’t know an FAI φ Notices were sent out to .ill ol our 3. Rather than paying for a magazinePower ship from a Wakefield, and really advertisers and to all hobby dealers who subscription as part ol their dues (which doesn't care, since his hobby is golf. handle The MODEL BUILDER that this would thus be lower), members will And lor a real thrill, just ask one ol issue would be late. We’re sorry that pick up their favorite magazine and find these guys il you can go through his we could not let you. our readers, know the AMA news therein. wood selection! about the situation until now. The plan is based on the logical C. The hobby dealer isn't getting Without taking up your reading time assumption that most every modeler rich. We know ol one dealer who was . . . and space in the magazine that can buys or has a subscription to at least one forced to quit when his store rent was be put to better modeling use, we will ol the live publications, and so com­ raised. The dealer has a family to Iced simply state that problems associated munication with AMA members will and could probably live better in an­ with rapid expansion (subscriptions and continue. (In fact, it may improve. other line ol work, only he loves models new dealer orders arc pouring in), slow Who’s to say a member reads the AMA and modelers. He gets "ripped o il” by printer delivery, and increasingly unre­ news il he’s not inclined to read the shoplifters and can ill-al lord the losses. liable postal service, we have had to remainder ol a magazine?). In addition, He gives lice advice to some jerks who literally '‘skip” February. By more or having all five mags carry the news then go to the toy store to buy the item less combining February into the March means that the AMA “ message” will gel lor a buck less. Most ol all, when you're issue, and streamlining our circulation to more non-members. waiting lor the glue to dry, and/or just and production stall, we hope to remain Best part ol all is that maybe now want to get out of the house for a on a more stable schedule, with the we can get back to modeling and knock while, he w ill “ hangar fly ” with you all magazine appearing at the beginning oil the hassling. day or night . . . maybe over a cold ol the month tor which it is dated. ONE REPORTER'S OPINION beer. NOTE: All subscriptions will be ex­ We are publishing the following arti­ D. The discount house is there lor tended one month to compensate lor cle by Thermal Thumbcrs Bulletin editor one reason: to turn a profit. You get a the "loss" of the February 1973 issue. Mike Keville because we leel the same "Bentwing 480” kit lor 8 bucks instead You know, this cover date thing is way. ol 12, but you can bet your lancy sort ol ridiculous anyway. Why not just "A very real and present danger to they’re crying all the way to the bank. label every cover with "CURRENT the modeler has appeared in the form ot You can’t go in and talk models because ISSUE" and let it go at that? so-called ’discount’ hobby suppliers. (a) they're too busy, (b) they don’t ADIOS, GMC You may ask ’what danger is there in want to, (c) they can't. Well, it appears that AMA may have lower prices?' Well, draw your own E. The biggest danger ol all may be finally found the answer to the GMC conclusions from the following: to the manulacturcr. II a customer (No, not “ Generous" Motors! We mean A. The hobby shop owner know \ his should purchase one ol their products, the Great Magazine Controversy.) A products. In the case ol every hobby what about th.it personal attention when recent proposition has been tentatively dealer I ’ve known, each was an active he can't ligure out how to cover his accepted b\ all 5 model publications builder/flier/competitor. II we buy an wing or start his engine? The hobby (though reluctantly by one ol them). item and later need to replace, modify, dealer will personally show him how; It goes something like this; understand, duplicate, exchange, or do maybe stay late at the shop to solve the 1. Starting in January 1974, all five ANYTHING to it, our local dealer will problem. The result, Mr. Manulacturcr, magazines will tarry AMA's eight pages do so with a smile. Then he’ll stand by is another satisfied user ol your prod­ ol news, as now published in AAM only. patiently while we look at every piece ol ucts. Suppose you take the item in 2. At a considerable savings over the balsa in stock. question back to the toy store: are you current arrangement, AMA will pay each B. The ‘discount house,' in many going to get lh.it personal attention month to publish the eight pages ol cases, is nothing hut a toy store. The there? I doubt it. You’ll probably be AMA news (to be lurnished camera- clerk who may sell you a K&B .40 (or Continued on page 44

4 The MODEL BUILDER OVER THE COUNTER

φ Bridi Hobby Enterprises, new ad­ wing is simply two butt-joined, card­ the Kralt KP-2B or S “ brick” radio dress; 1611 E. Sandison St., Wilmington, board covered loam wing panels con­ (no throttle), which is mounted, ex­ CA 90744, is just now releasing kits for trolled by elevons. A hardwood profile posed, in a pocket cut out of the lop ol the latest in the famous Kaos series, the type ‘‘fuselage" is epoxied to the center the wing at the center. A complete Super Kaos. Capable ol performing all section, carrying a side-mounted 35 to "Products in Use” report will be pre­ AMA and FAI maneuvers, this newest 60 engine and exposed plastic bottle sented next month. Pi ice was not deter­ ol Joe Bridi's designs is agile and respon­ tankin true C/L combat style. Quarter mined at this time. sive at high or low speeds without any inch plywood tip plates extend mostly * * * harmful snap tendencies. downward and carry wheels on the in­ Los Altos Models, Box 1477, Moun­ The ship is easily built from machine- board side. A nose wheel, steered by the tain View, CA 94040 is now offering cut, select, lop grade balsa and hard­ elevon system, and mounted on the White Trash, a 10 loot span R/C compe­ wood parts. Indexing is used throughout “ fuselage," completes the trike gear tition sailplane (original Rick Walters the construction design to ensure easy undercarriage which must claim to have design was published in january 1972 and true assembly. Ship can he built the widest tread on record. MB) in kit form. The kit features a last and flown with or without retractiblc To be called the Wing-Master, the . . . building foam cored wing which is avail­ landing gear. There is ample room for et . . . plane is designed to be Down with able in both 120 and 144 inch versions. all types. Complete kit, including .ill special hardware, costs $57.95. * * * Kralt Systems,Inc., after many years as a leading manufacturer ol radio con­ trol units, has now broken into the model aircraft kilting lield. In what might be considered an unexpected approach for a company whose leader is well known throughout the world for his abilities in pattern competition, the first kit to be produced is a Hying wing designed primarily for R/C combat! Developed by Joe Martin, a member ol the Kralt organization, the Hying First model airplane kit by Kraft Systems, the WING-MASTER, for R/C combat . . or whatever!

The Drag’n Fly 40 Mark It . by Dumas Products. The new Super KAOS by Bridi Hobby Enterprises.

The MODEL BUILDER 5 Here at last! The fabulous ANTIC BIPE, by Lou Proctor. Same fuselage and tail as ANTIC monoplane. Span is 64 inches. Optional flaps are included. Fuselage There isn’t space here to fully de­ R/C models. Main feature is a cowling and tail are conventional balsa construc­ scribe the kit or the extent of prefabri­ that carries scale engine cylinders and tion. Kits, which include Solarlilm cov­ cation. Although we built an Antic also fits nicely around the model’s ering are prices at $49.95 (120 inch about 5 years ago, we were still left in actual flying engine. span) and $55.00 (144 inch span). speechless wonder upon examining the * * * * * * Bipe kit which just arrived a few days Dumas Products, Tucson, Arizona, The long awaited Antic Bipe, design­ ago. II we can somehow find the correct is introducing an improved version ol ed and produced by Lou Proctor, is at words and still sound believable, we’ll the popular, all birch plywood Drag’n last becoming available. A follow-up to describe it all in an upcoming Products Fly 40 kit. The Mark II version provides the famous Antic monoplane, the Bipe in Use article. all but speed and maneuverability in a is essentially the same fuselage and tail * * * radio controlled boat. but with 64 inch span biplane wings. House of Balsa, manufacturers of the * * * Lou Proctor’s Antics and Nieuport Shoestring quarter midget racer, now Vortex Model Engineering, manufac­ II are the most exotic model airplane have a sheet of self-adhesive mylar fuel turers of the popular Santa Barbara One kits ever produced. In the basic tradition proof product decals scaled to quarter Design and Soling-M R/C sailboats and of the hobby of years ago, when models midget size. Price is $1.49. Familiar kits, is back in production. Expecting were built in the same fashion as their labels include Champion, Gulf, STP, a normal Fall slump in orders, the plant full size counterparts, Proctor airplanes Goodyear, Texaco, Bardahl, Shell, Fly­ stopped production in order to improve are constructed of spruce, plywood, ing Red Horse, and of course, the balsa, and bamboo. In addition to this, Quarter Midget insignia. you find functional rigging with turn- * * * buckles, control cables actuating sur­ Williams Bros., well known producers faces, inspection panels, and so forth. ot molded plastic accessories, has up­ dated the 2-inch scale Le Rhone engine kit to include an attractive engine stand ' M o w s for display purposes. Price is $11.95. Another item coming soon is an B A LS A BIN cngine/cowling kit for "Golden Age” I SHEETS-STOPS BUXKS A UNIQUE NATURAL WOOD

GUILLOW enters the balsawood retail field Updated 2 " scale Le Rhone by WILLIAMS WILLIAMS BROS upcoming "Golden Age" with this dealer display package. BROS, features display stand. plastic engine for sport R/C models.

6 The MODEL BUILDER All molded styrofoam R/C SUPER CHIPMUNK by MIDW EST. Norm Page's MACH I by MIDW EST PRODUCTS. facilities for an expected increase of several additions to its range of model all sheet balsa, rubber powered scale sales in 1973. Problem was, the slump kits for 1973. models. Kits feature color printed die- didn’t happen! Consequently, orders Top o f the line is Norm Page's Mach cut wood, interlocking construction, started piling up. I pattern ship. Norm won the 1972 Mas­ self-stick decals, preformed wire parts, All of that is over now. Back-log ters (and a place in the US R/C Team) rubber, prop, etc. J-3 Cub, Citabria, orders have been shipped and most with this plane, also the Tangerine meet. L-19 Bird Dog, and Cessna Cardinal items arc in stock. The S/B kit has Kit is amazingly complete, features foam each sell for $ 1.95. been increased to $165, and ihe same cored wing and stab, molded retract * * * kit minus sails is now $130. Assembled gear wheel wells, and rolled plans. Price Hi Johnson, well known model man­ Santa Barbaras, less radio, are now $49.95. ufacturer for many years, has now $400. The Soling-M, Sail Control Unit The popular Midwest Little Stik has teamed up with Lee Druckman (Milman and sail prices have not changed. been scaled up to 54 inch span (600 Engineering spoked wheels) to lorm Hi ♦ * * sq. in.) for .19 to .45 power. It ’s called Johnson Model Products. The company Sid Morgan’s Vintage Plans has now the Sweet Stick 600, and sells for address is 1669 Twelfth St., Santa acquired the Robert Swcilzer line of $32.95. Monica, CA 90404. "Custom Plans Service” plans for R/C A rt Scholl’s well known Super Chip­ Aim of the firm is to produce top models. Includes such items as 90 inch munk has been scaled to 46 inch span quality modeling accessories and equip­ Heath Parasol, 101 inch Stinson Voyag­ and reproduced in an all molded styro­ ment. Some items currently available er, 108 inch ]-3 Cub, 60 inch Waco foam kit, which comes complete with include the Flexiscope fuel tank (1 to 4 UMF-3, 60 inch Boeing F4B-4, and aluminum motor mounts, hinges, horns, ounce capacity), in-line, fuel can, and others. Send 25 cents to Sid at 13157 preformed wire, etc. To be powered by clunk fuel filters, full fulcrum bell- Ormond, Belleville, Mich. 48111, lor .09 to . 19 engines. Price $24.95. Continued on page 53 complete list. Aiming at the beginner to modeling, * * * Midwest is introducing a new series of Midwest Products has announced inexpensive, easy-to-build, 20 inch span.

Unique fuel caddy with attached electric pump by SULLIVAN PRODUCTS.

Miniature rod ends in several screw sizes, by HI JOHNSON MODEL PRODUCTS, w ill have many modeling applications.

The MODEL BUILDER 7 HOW TO CULTIVATE . . .

By BOB UPTON J\ BEANPATCH ^

Bob's beautiful little .40 powered scale-like sport model had the misfortune of being in the first issue of The MODEL BUILDER . . . misfortune in that it didn't get the exposure it deserves. Beanpatch has all the require­ ments for sport competition; speed, stability, maneuverability, and economy.

^ “ Beanpatch” is the happy result of a racing, hence the tail dragger configura­ therebetween and sanded to shape. less than scientific, evolutionary process. tion. This particular version met its Belt or disc type sanders arc handy for My approach to model aircraft design demise in a Valley Flyer spin contest this particular operation. falls into the category of “ rotten luck which I would easily have won if the Use a straight building surface, triumphs over science again!” Moreover, judges had continued counting the obviously, and lay out the Ά by 3/8 my “ that looks about right" attitude number of revolutions as I skillfully trailing edge and the A by A rear toward model design work seems to screwed the model into the ground. bottom spar directly over the plan, work rather well for me, so take that, I didn’t particularly like the constant and after installing the ribs, proceed you slide rule types!! chord wing, anyway, so prototype No. 2 fabricating with the top of the wing, i.e., I wanted, in this day and age of has a modified "Perigee” style wing attach the front and rear spars, leading super collosal 800 mph retract, R/C (designed initially by Tom Brett), with and trailing edge sheeting, and the pattern bombs, an airplane that would a tri-cycle type main gear attached sheeting that spans the center section be fun to fly, relatively stable, and an thereto. from ribs W-l to W-4, as well as the airplane that looks like its full size Like many modelers, I hate to build sheeting spanning end ribs W-l I and brother. I’ve even had people say, wings, so start here, guys, and get the W -l2, respectively. Finish o ff the top of “ Beanpatch looks like a real airplane!” worst over with. You can use the the wing panel with the cap strips. Anyway, the model started out if life "stacked rib " concept to make the ribs Turn the cured wing over and insert as a tail dragger with a constant chord whereby the center and end ribs arc cut the hardwood landing gear blocks and wing. I needed a snappy design that out and the appropriate number of all of the plywood doublers where would keep me in practice for Formula I intermediate rough cut ribs stacked indicated. Note detail A-A; be sure the

8 The MODEL BUILDER balsa wood doubler adequate for the job. Glue the doublers to the inside surfaces ol the fuselage sides and set aside to dry. Locate the firewall and bulkhead positions on the inside surtaces and mark with a ballpoint pen for a reference line when assembling the fuselage. Band­ saw the firewall from 5-ply Ά" plywood and locate the motor mount. Drill and insert blind nuts for the mount and attach the nose-gear steering brackets to the back side of the firewall. Cut out the rest of the fuselage bulkheads, including the turtle deck formers, and you are ready to assemble the fuselage. Locate the firewall (F -l), F-2, and F-4 on the fuselage, being careful to maintain alignment, and glue and tape in place. Next, pull the tail post together with a pair ol clothes pins, checking Note the pylon racer influence in the neat way the fuselage lines flow back around the Enya 45 again to be sure all the formers are from the aluminum spinner. Ship finished in red tissue and white lacquer. properly aligned. Be particularly careful grooved vertical block restraining the ailerons per the plans, using the torque to make sure the firewall is square with end of the landing gear wire is securely rod method outlined and be sure and the previously marked relerence lines. cpoxied in place. The plywood dihedral pin all hinges with toothpicks or the Since I'm not a great believer in engine braces, W-I T and W-15, can be cpoxied like! Add the wing tips and you are down thrust and side thrust, alignment into the nearly completed wing panel. ready to join the wing panels. Alter the problems are much simplified. The bottom of the panel can then be wing is completed and the servo area Next, glue in the rest ol the bulk­ sheeted like the top surface and set cut out, add a two-inch strip of glass heads forming the turtle deck, etc. aside to dry while the other wing panel cloth around the center section ol the Since the nose gear is behind the firewall, is built. wing. I would suggest installing the nose wheel Merely invert the wing drawing and Start the fuselage by cutting out the apparatus, including the nylon push rod build the other wing panel directly over left and right fuselage sides according to guide, wire, etc. This is easy to do at the plan. Leave the center sheeting o ff the plans, including the 1/8 luselage this time since the top and bottom nose ol the bottom ol the second wing panel doublers. II you prefer, you can structures arc o il, exposing the front to gel at the dihedral bracing when the substitute 1/32 plywood lot the 1/8 balsa section. Install the cockpit floor and two wing panels arc joined. Add the doubler, however, I have found the instrument panel prior to fitting the

Beanpatch about to pounce on it's own shadow. The little ship has very pleasing, scale-like lines. Reminds you of an EAA homebuilt.

The MODEL BUILDER 9 FULL SIZE AVAILABLE PLANS - 64 PAGE SEE

o The MODEL BUILDER lop decking. The lop decking is com­ that the diagonal side pieces fit flush to to cut the Ά" slot for the fin, then insert prised of ihe three sections outlined on the top and side, then glue in place. all of the stringers forming the rest of the plans. The decking is started by Next, rough cut the bottom block the turtle deck. The bottom, cross-grain­ gluing the lop center piece to the top of and be sure to hollow the inside section ed 1/8” sheeting may then be attached F-l and F-2 and to the top of the of the block to clear the engine mount and the whole mess set aside to thorough­ instrument panel, followed by fitting before gluing in place. Glue the top, Ά ly dry. Before final shaping of the nose the two side pieces in place. Carve and by Ya soft balsa turtle deck piece in section of the fuselage, I usually install sand the fuselage sides and top piece so place on the rear formers, being sure to the engine with spinner attached so that

The MODEL BUILDER 11 I can accurately locate the spinner and provide the proper clearance between the spinner and the fuselage. I also insert a 1/16" plywood nose ring behind the spinner to toughen up this rather vulnerable section of the model. Remove the engine and do the final shaping and sanding of the fuselage. The stab, elevator, fin and rudder are conventinally constructed and are added to the fuselage after final shaping, sand­ ing, and hinging. The wing may be attached to the fuselage in a number of ways to suit the modeler’s particular preference. I like the leading edge dowel and trailing edge boll method. On this particular model, I use two dowels at the leading edge with a single 8-32 screw into a blind nut at the trailing edge, as shown on the plans. Believe it or not, out o f pure nostalgia, I covered "Beanpatch” with colored Japanese tissue and applied many coals of clear buterate dope over the open Beanpatch's designer and builder, also Model Builder advertising rep. Bob Upton. areas. This material has proved to be surprisingly lough. The model has flown many times and is holding up well. “ Beanpatch” is fully acorbatic, hold­ ing its own with a modest Enya 45 up front. I realize, of course, that most self-respecting pattern flyers wouldn’t be caught dead flying anything with less than a .60 belching forth up front, so I don’t expect to attract these guys. However, if you want to fly all day without an intermediate trip to the local hobby shop for another gallon of fuel, then "Beanpatch" is made for you. Come to think of it, "Beanpatch” is nostalgic from beginning to end since it does have the look of the "stick and paper” days of modeling. Oh well, what’s > wrong with that, anyway? φ Before the spin contest! Beanpatch No. 1, the straight-wing tail-dragger. Frank Capan photo.

Bob brings Beanpatch in for a low fly-by for the benefit of Nate Rambo’s camera. All it needs is a pilot sitting up there, enjoying the ride!

12 The MODEL BUILDER The old faithful Midwest Tri-Squire lives on. This one by Wayne Kincaid, Kingsport, Tenn. Heathkit 6-meter radio. Tri-Squire is one of the few true trainer-type R/C models. Many of today's better pilots earned their wings w ith this reliable aeroplane. RADIO CONTROL REPORT

By FRANK SCHWARTZ

Ø T h is is the third in what really isn’t be the first mentioned system arrange­ on installation in your plane. Again, as I a series, but ye Head Editor apparently ment, Mode I. mentioned before, there is a fine book thinks I can spel purty gud so I’m back Then, when you get your major in­ put out by RCM, with photos and again. First issue we talked generally vestment and bring it home, for gosh details most complete on how to install and told you what the “ column” would sakes read the Instruction Manual . . equipment in a plane. This is certainly concern itself with. Then last month I or as my kids call it: The Destruction a good buy for the novice . .. and from rambled on about choice of a good Manual. The manufacturer really means browsing through it, I think it would be trainer and type of equipment to use for you to read it . . and, he hopes . . good for the R/Cer who has been around and select. understand it. If you don’t, find some­ a while, too. One thing I neglected to mention one who does and have them explain Getting the equipment in the plane was "mode” . . which means which it to you. Some manufacturers give you isn’t as easy as you think. It can be a sticks to work what. By far above all a very sketchy manual and others have pleasure . . . or pure hell. Usually the other arrangements is elevator and ail­ a very comprehensive one with details novice dives right in and does some fan- erons on the right stick and motor and rudder on the left stick (Mode II). This applies to most right handed people . . I ’ve seen some weird arrangements for a couple of "lefties.” Most equipment comes with this set-up. Then a smaller group prefers ailerons on the right along with motor, and elevator and rudder on the left (Mode I). Some of the top competition flyers use this less popular arrangement and their reasons, if you would ask them, are most interesting and often show some tremendous thought behind the choice. Then there is the single stick, in which the trans­ mitter is cradled in one arm, and you operate the 3-axis stick (knob twisting controls rudder) with your free hand. Generally speaking, single stick is only a little more popular than Mode I, never­ theless, there are those who use it and

love it. If you don’t already have any Twin standoff scale Tiger Moths by Larry Quigley and Chuck Leitch, Omaha, Neb. Scratch-built, pre-conceivcd ideas your hest bet would they are prim arilly spruce construction w ith glass cowls. Fly well on Veco 61's. Real nice!

The MODEL BUILDER 13 This Fairey Swordfish is available as a Complete-A-Pac kit from Bob Holman Plans, PO Box 741, Bulkhead switch mount for outside operation, San Bernardino, Ca. 92402. Span is 60-1/2 inches. He has many others. See the Classifieds. by D&R Products. Only 88 cents. tastically weird things to get the equip­ Then there is the problem of mount­ flyer at our field complained that his ment in the plane. I hink . . . and think ing the control horn. You might be sur­ plane would turn violently to the right again . . . neatness really does count. prised about this . . . sounds simple. Not when he gave it a right command, but Make the push rods (if shown on the necessarily so. I've seen some that were that left was almost non-existant and he plans of the plane you built) carefully screwed into the balsa with wood was having trouble flying when he need­ and make sure they don't rub against screws, which pulled out and caused a ed to turn left. We looked at his very bulkheads or something else. They crash on the first flight. The balsa is well built and finished plane and found should exit the rear through a neatly naturally too soft to sustain a screw he mounted the horn at the rear end of cut slot and go direct to the controlled mounting. You have to have a wooden the rudder instead of at the hinge line! surface. No turns in the road please. Try or plastic backing plate on the other Nobody told him where to mount it and to get it in as straight a direction as side of the control horn. Carl Goldberg possible. makes a fine line of horns with backing plates as does Rocket City and many others. Look at the little picture that usually is included and try to do it their way. Now everything is OK isn’t it? No, it isn't. Chances are that no one told you exactly where on the surface the horn should be mounted. I ’ve seen them all over the place. The holes on the horn Strain relief gimmick made from control should be exactly at right angles to the h o rn , etc. surface and directly over the hinge that's where he thought it should go. line. If this doesn’t make sense look at Happens more times than you think, the diagram I drew. (See sketch) Oddly too. enough this simple thing is often com­ Again neatness really counts, and pletely ignored in plans, as the manu­ spend some time thinking out the in­ facturer of the kit assumes you know stallation of your equipment. The rub­ this. Should you mount the horn other ber grommets supplied by the radio than in this place, you will get what is manufacturer were meant to be used. called differential. That means that you They cushion the servos and keep vibra­ will have more travel to one side of cen­ tion from the engine from being carried ter than the other. Example: one new to them and causing them to fail. Vibra­ tion is the biggest problem with the electronic equipment. Even the battery pack is susceptable to vibration damage and can fail. You should use foam rub­ ber or try some of the golden foam put out by Sullivan, which comes in all thicknesses. Usually your equipment comes with special trays to mount the servos, which often provide for the switch, too. Hmm . . . that crazy little switch can give you fits. It can be in the plane and you can’t get to it. D&R makes a nice little 88 cent gimmick that allows you to tie a Dropping resistor for 12 volt battery is made from two No. 1157 double filament automotive piece of music wire to it and then there bulbs. Gives a choice of current depending how rosy you like your glo-plugs to glow I Two heav­ is this little rod that sticks out the iest filaments in parallel make a good starting point for shielded plugs. Idea by George Wilson.

1 4 The MODEL BUILDER Consistent European pattern contest winner and top contender for this year's World Champs in Italy, Austria's Hanno Prettner and his Super Sicroly. Report on the fifth annual Bled Cup pattern competition in Yugoslavia . . a tune up for the 1973 World Championships in Italy. By Fritz Fleischhacker. side ol the plane which you push and bakelite and have to replace the switch, φ For the fifth time, the International pull to turn the radio o ff and on. so try for the D&R gimmick . . . or you Bled Cup was carried out in Lesce/Bled Better than music wire is 1/16 inch can, o f course, mount the switch on the in Yugoslavia. A total o f 28 participants copper clad welding rod. You will get side of the fuselage. This means a rec­ from 7 nations took part in the com­ a lifetime bundle at the welding supply tangular hole and two screw holes . . . petition from September 29th to Octob­ shop for a dollar. You can solder to it and please, remember to mount the er 1st. The standard of the participants and it is very handy for a variety of switch on the opposite side from the was very high, because apart from the uses, as it w ill bend easily. It is good exhaust. That oil goes everywhere and World Champion Giezendanner (Swiss), for the switch wire and you can solder a no sense making it easy for it to get in­ vice World Champion Matt (Liechten­ little blob on the end so you don’t side. stein), and the 4th o f the world cham­ punch a hole in your finger. Possibly the most overlooked thing pionship Prettner (Austria), there were Some people like to drill a 1/16 hole on any installation, be it novice or pro, a few participants for the 1973 World in the switch toggle or bat or whatever is the durned antenna. Some people Championships in Italy who were pre­ you call it, but often you break the Continued on page 45 sent: Matke, Neckar (Germany), Weixel- baumer (Austria), and Merse, Markun (Yugoslavia). Moreover, some top pilots from Germany, who provided half of the participants, took part. Lesce-Bled became known because of the 3 L-Cup (Yugoslavia, Austria, Liechtenstein), which unfortunately was carried out last year for the last time. The organization was accomplished in the already-known excellent way by the members o f the Aero Club Kranj. Each round began punctually and every­ thing else went on without any protest. Switzerland, Germany, and Yugoslavia formed an international jury and also the 5 referees came from different countries. Even before the competition began, there were great discussions a- bout the ranks of the 3 favorites, be­ cause this was the second meeting of the 3 champions for this year. In spring, at the International Graupner meeting in Gorizia, Hanno Prettner was the win­ ner. Second was Wolfgang Matt and The world's biggest kit? Eloy Marez' daughter Patti, 5'-2" w ith his Hegi Bell Huey Cobra kit. third Bruno Giezendanner. It's in all three boxes! Continued on page 48

The MODEL BUILDER 15 FULL SIZE PLANS AVAIl ARI AVAIl- F fi4 ARI PLANS FULL SIZE PAfiF SFF

on which plane is faster, others on whose plane is finished the best, while CORSAIR "F4U/C” still others feel like a king if their ship will out-perform the competition in stunt pattern. The latter is the category By JACK SHEEKS Great flying profile stunter for .40 engines. that Dennis DuVall falls into. Dennis More and more scale is appearing in stunt circles. Profile is the has about 4 months of flying the entire easy way to get there. pattern under his belt and decided com­ petition stunt was his bag. Well, there are many good stunt model kits and ^ T h is profile stunter should be called profile models. These ships cost little to plans on the market now, so that was the DuVall Corsair. Why? If Dennis build, take a heck of a beating, and are no problem; but he wanted something DuVall hadn’t been so persistant with a ball to fly, while transposing a raw out of the ordinary for profile stunt. On me it would never have been built. beginner into a pilot. one of his frequent visits to my balsa The C/L model clubs here in Indiana­ In some areas of club activity, the butchery palace we were discussing the polis are much like others around the competition gets tough even without many avenues o f design and the varied country . . . they lean strongly toward the members knowing it. Some thrive aircraft that would fit the bill. I had to

If the engine doesn't give a hoot about starting, you sometimes have Dennis DuVall gives us a look at the underside of the profile Corsair. to supply your own "H oot." John Durham assists Dennis. A Top Flite 11/6 Power Prop worked best with the McCoy 40.

1 6 The MODEL BUILDER open my mouth and tell him the Corsair the McCoy 40 down to a steady run profile, read on. has always been a favorite of mine and and now the Corsair turns in a very good CONSTRUCTION that I had a plan I had drawn five years constant pattern. And believe me the To begin this profile jewel, go to ago and never built. ship is a real eye catcher at the flying your nearest hobby dealer and buy the That did it. Nothing would stop him fields whenever and wherever it appears. lightest and straightest wood he has. until I drew a profile of the ship; same So, if you're one of those guys who Now that you're back home in your size as the full scale ship, but with a pro­ wants that little something extra in a Continued on page 61 file body. His wife, “ Buns,” was a little perturbed ‘cause we worked into the wee hours. The kids were fussy and she had to work the next day, but un­ daunted by his w ife’s threats of his having to sleep in the car, he insisted I complete this project. When I would say, “ I’ll finish this in the morning,” Dennis would give me one of his hurt puppy looks, and we’d continue putting a line here and there, explaining as we went. After Dennis had the Corsair finished and ready to fly, I told him I should have the honor of its first flight. Much to my surprise he said OK. The ship grooved well and turned quickly but needed a few trim changes. After the changes were made the ship flew a good stunt pattern . . . but something was still lacking . . . The right prop . . . We finally settled on a Top Flite 11x6 "Mercy, Mathilda, you look terrible w ithout your makeup and shoes on!" What’s up front? Power Prop. This seems to have settled Looks as though Dennis is planning to screw the Corsair into the ground.

The MODEL BUILDER 1 7 "Howard M ike" 1/2A proto contest ship by Bob Adair, inspired by Nats stunt champ Kieth Trostle. Took 5th at 1971 Nats. Note left-hand prop.

ONTROL-LINE

By Dick Mathis

such kit I had ever seen, and finding it quite a few times with no real problems. to be unusual, I bought it and built it. In As you might imagine, it was a real sen­ its first form I used an Ohlsson .60 with' sation whenever flown, especially with ignition. The ‘giro flew great. With mot­ other modelers.” or running we would give the rotor a Mr. Hulick continues: “The ‘giro spin and let it taxi. After 30 feet, rotor got a second life after eighteen years speed was enough for takeoff. The of storage and several movings when my model flew fine; just like most ships of son discovered it and cleaned it up with its day, with good climb and dive con­ a new coat of paint. This time we used trol but no loops or even wingovers. I a FOX 35 on glo and it flew just like ® Apparently, the mere mention of the flew the ‘giro over a two year period before only a bit better due to lower word “ Autogiro” (column before last) sets some of our readers o ff pretty well. The response has amazed me. It seems there was an autogiro kit way back in the forties. Edco made it and at least three of your fellow readers built one. Rene Mechin of N.Y.C. wrote, ” ... it flew just fine. Weird thing, I had an 'over the h ill’ McCoy .49 in the thing just to see if it would and was amazed. Can’t remember what happened to it though." Rene went on to report that Larry Scarinzi has been selling copies of plans to the Edco over the last few years (26 of 'em), so it lives on. Then H.C. Hulick of Pittsburgh pop­ ped this one on me: “ In my early days of U-control, I bought an Autogiro kit. This was about 1947 or 1948 as best The translation is,“ First Slobovian Airliner," by Bob Adair. Causes quite a few double-takes I can remember. That was the only with dummy engine cylinder and pilot's chair. Note air-conditioned fuselage.

18 The MODEL BUILDER Jgv \

This is the modified Edco Autogirov discussed in the text. Power is a Fox .35 with throttle. FR shook out several attics w ith his recent request for info on powerless rotor aircraft. weight without the ignition parts. A- just stand outside circle and pray) auto­ President, who is the ultimate ukie en­ gain it was a real grabber wherever he giro from the 1958 “ A ir Trails” annual. thusiast, can shed some more light on flew it. The only problem is that there I t ’s called “ Circle W hirly," has an old the autogiro topic since he goes back to is no glide. When the engine stops she K & B “ Infant” .020 for power, and the 1930’s in ukie. I t ’s rumored he has loses lift and goes down right away. As even includes a trick mail sack pick-up an Edco kit in the back o f his shop, plus fuel gets low you fly low and get ready setup, which must have been pretty maybe he can explain to me how they to give full up when she dies, and hope touchy! really work! I'll try to come up with to stay in one piece when she hits. The So, we have some interesting ques­ some design guidelines and flying tips pivoting rotor will, on a hard landing, tions. (1) Were there any other kits for so we can all get into the act. I ’ll print let one blade dip and hit the body." Mr. autogiros besides Edco’s? (2) Will an everybody’s address in case you’d like Hulick goes on to offer to send the autogiro loop? (3) Will an autogiro fly to correspond. whole airplane to your columnist! Stay upside down? (4) Will I get rich and H. C. Hulick, 158 Woodhall Dr., tuned for the results when Fast Richard even more beautiful so I can move out Pittsburgh, Pennsylvania 15236. gets ahold of this gem! of the Swamp? (5) Will this column ever Robert J. Adair, Quality Acres Lot Then Bob Adair writes from Arkan­ end? 48, Blytheville, Arkansas 72315. sas with info on more autogiros. There THE PLAN FROM HERE Rene Mechin Associates, 117 East was a wild twin rotor one by either Roy I suspect Johnny Clemens, our AMA Thirtieth St., New York, N.Y. 10016. Clough or Paul Del Gatto (help us) in • · · one of the mags. Another one for an Anderson .65 appeared in American Modeler in March/April 1965 (order Plan Group 465). It had throttle con­ trol and its designer, Ole Dan Nielsen, claimed it could hover and supplied photos to prove it. Matt Smith o f Dallas came up with plans for this one. It used a McCoy 35 case for the rotor assembly bearing. Bob sent a photo o f his own 'giro, built, but modified from an old Edco kit in 1956. Reports it is a good flyer and has stood up over the years. Fie writes: "I have never tried to stunt it, but I once talked to a modeler who had built the same kit and claimed that he looped his." Our beloved editor got into the act by sending plans to a tethered (string attaches to pivot - no controls - you Another Adair aeroplane, this one a McCoy Redhead 35 powered sport stunter, built in 1961 and still going strong.

The MODEL BUILDER 1 9 JP Models' Dart II and Orbit 4 Channel Single Stick make a nice combination for sport or competition flying. PRODUCTS IN USE ORBIT TAKES A RIDE IN THE JP MODELS DART II

® P aul Parszik, owner of J.P. Models, stallation. identical. 26557 Mazur Dr., Palos Verdes Pennin- And speaking of radio, a call to John Outstanding feature o f the JP gliders, sula, CA 90274, doesn't hardly even Elliot of Orbit, just a few miles down of course, is the finished and painted talk to us any more. the road near Orange County Airport, plywood fuselage. Basically, it is made Actually, you can’t really blame him brought us a 4 channel, single-slick from a single 1/32 inch plywood blank too much. Early last June, in a moment system on 53.4 with PS-4 servos . . . by which is rolled over several ply bulk­ of wild anticipation, and with only UPS yet . . . didn’t even have to go get heads to a round section, except at the about five weeks to go, we decided it it! top, where the ends of the blank meet would be just a great idea to build an So what happened after all this ex­ and are glued to a triangular top spine. R/C sailplane and enter the National cellent service? Five weeks later, as we The compound curved nose is a thick R/C Soaring Championships in Chicago. frantically packed to catch the plane for molded fiberglass cone which is epoxied Both our Graupner Cirrus and Wik Chicago, the Dart II, except for a planed and blended into the ply shell. The fuse­ Kestrel had bitten the dust in unfor­ and sanded stabilizer, had not been lage comes completely built, sanded, tunate accidents, and we were tempor­ touched. As for the Orbit radio, we had and painted in white epoxy; every bit arily “ without silent wings.” O f course, removed the tranny from the molded as rugged where needed, but consider­ all we had to do in the meantime was to foam packing box, turned on all switch­ ably lighter than an equivalent all-fiber­ prepare notes for AMA R/C Contest es, wiggled and twisted the control stick glass fuselage. Board meetings, arrange judging sched­ (about as useful as kicking tires on a Tail surfaces are pre-cut 3/16 inch ules for Pattern and Scale flight compe­ new car) and then put it all away again sheet balsa and require only shaping tition, and work 25 hours a day on this (Yes, with the switches turned off!). and sanding to an airfoil section prior modeling rag. Well, here it is, seven months later to covering and/or finishing. Although While still swept up in this bit of lost and we finally have the project finished! lightening holes may be cut in these logic, we called Paul Parszik and sold No reflection on the time required to surfaces, a preliminary check o f balance him on how important it was to get a build the Dart II . . . it really is easy suggested to us that it might not be Dart II kit to us immediately ... which and fast building . . . and by the way, necessary. (It wasn’t.) he did. Our reason for choosing the the radio was updated to a 1973 model. The plans provide both left and Dart II was based on examination of the Let’s take a more detailed look at the right wing panels, handy if you want kit just a few weeks earlier, during The Dart II. to build both at the same time, and Model and Crafts Show (MACS) at the As you may or may not know, the appreciated if you’ve ever built “ two Anaheim Convention Center. Here we Dart II is an expanded or enlarged ver­ lefts” by mistake. The airfoil is de­ saw a glider with all sheet balsa tail sion of the original 100 inch span Dart. scribed as a modified Eppler 387, and surfaces, easily built wing panels totaling Outside of a slightly longer fuselage, no matter how you look at it “flat 134 inches span, and best o f all, a com­ and of course, 34 more inches of wing­ bottom builds easiest.” Basically, the pletely finished and painted rolled ply­ span (with a proportionate increase in wing construction consists o f top and wood fuselage . . . ready for radio in­ tail surface area), the two ships are bottom spruce spars at about the 30

20 The MODEL BUILDER Simple installation has PS-4 servos on tray, receiver next, and battery pack in the nose. Switch harness not used. Screwdriver props up tube for inside antenna. Rubber band holds hatch in place, completely covering radio compartment. Painted pilot comes w ith kit. percent point, which is also the high but they seem to be strong enough, One other modification was the addi­ point of the section, with sheeting on provided the webbing is well fitted and tion of 1/16 x 1/8 diagonals from spar top and bottom which extends over the glued in order to transform the spar to trailing edge between all ribs, a habit leading edge strip. Solid webbing be­ structure into an "1” beam. Don’t skimp left over from free-flight days, and tween spars, from root to tip, completes on that webbing! We definitely don’t probably not necessary. the "D ” tube structure, which of course agree with Paul, however, on butt joint Incidentally, before adding the top supplies all of the wing strength. The splices. I t ’s bad enough to have them at sheeting, we propped in about 3/8 inch remaining portion of the wing is open all, but then to butt all of the spanwise washout in the tips rather than rely on with a solid triangular trailing edge. The members (leading edge, trailing edge, warping it in during covering. Also, from root end o f each panel is totally sheeted spars, and sheeting) at the same location wetting the top sheeting to facilitate for about 8 inches, tapering for the next . . . no dice! We scarfed the spars and curving it to fit the airfoil, we found 12 inches to distribute the bending trailing edge, putting the joints out of that the wings came o ff the board with loads gradually. line with each other. This required the built-in elliptical dihedral! Since this We were a bit apprehensive about the purchase of extra spar stock, but it was ain’t all bad, we simply took some bend spindly 3/32 x 3/16 inch spruce spars, worth it for our peace of mind. out of the 1/4 inch joining rod to com­ pensate. The curved dihedral actually looks kinda sexy! Speaking of joiner, fiberglass tubes are epoxied into the ply root ribs to receive said 1/4 inch rod. Unfortunately, it took hours of hand sanding with emery cloth to get that joiner to fit in the tubing. Brass tubing slipped on easily, but we were determined to use what came with the kit. A second small wire joiner is employed to maintain proper and equal angle o f attack in both panels. Unlike most sailplanes, the Dart wings are joined to a solid center section block and are then strapped onto the fuselage with rubber bands. We intend to modify this arrangement in the near future and will pass the info on to you when it’s done. Another modification was made in anticipation of a problem bothering other Dart flyers. The low stabilizer position makes it quite vulnerable to

We added the 1/8 inch OD brass tube skid. Low stab position makes it extra vulnerable, espec­ damage by hard objects on the ground ially during landings. Stab touched first when ship was at rest, actually bent it from weight. Continued on page 62

The MODEL BUILDER 21 SATAN ΛΛΚ.ΙΙΙ By BOB BEECROFT A red-hot Class A competition free-flight that gets results without a lot of auto-gimmickry. Prepare for the coming season's battles with a sharp weapon.

® T h e Satan series began during the The large, light model even handled of the art, and is a compromise between last days of the short-lived 178 ounce the wind well, as was proven one very the very smalles·, and hottest climbers, rules. The first two national records windy year at the Phoenix Southwest and the larger Mk II Satans. The 520 were set with a heavy (9 1/2 oz.), 320 Regionals. Many airplanes stacked due inch wing and large stab give a beautiful square inch version of the design. These to the wind, but the 425 just went up glide, very fast climb, and smooth trans­ were the 1/2 A and A Junior records. and up, flipped out into the glide, and ition. Both records were set after the rules maxed every flight. This Mark II ver­ My own Satan 520 uses a Super changed to unlimited weight. sion was built in a variety o f sizes from Tigre G - 15 .19. Initial choice for pow­ With the then-current long motor 320 to 1000 square inches . . er was the Rossi .15, but due to lack of runs, a large 425 square inch version The Mark III Satan, o f which the availability here in San Diego, I finally was built for 1/2 A - A competition, 520 is the latest in the series, has been settled on the Tigre. Any o f the hot weighing 8 1/2 ounces. This airplane built in sizes from 240 to 1300 square ,15’s can be used with success, or for a took full advantage of the long runs and inches. The Mark III comes after a lapse milder ship, a Cox or other good .09 had a supurb transition and glide, with of several years in building activities due could be used. surprising penetration due to the sharp to service, marriage, college, and so on. CONSTRUCTION leading edges used. This airplane picked The current series configuration was The flying surfaces are pretty conven­ up the Senior 1/2 A and A records. developed after some study of the state tional, so not much detail is neces-

"Hey Ma! Looky here at Mark Spitz holding a toy airplane!” Cool it. Ply "hook" on DT stab also acts as a stop, eliminating lim it wire, folks, it's only Bob Beecroft, and the "toy" is Satan. Orbiteers are a San Diego free flight club. Bob is 1973 President.

2 2 The MODEL BUILDER sary . . . A couple of notes though. Don’t skimp by using balsa for the top spars. Spruce really adds a great amount of strength, and very little weight. Pick medium grade balsa wood for the center section leading edge, trailing edge, hard for the bottom spars, and lighter grade for the main panels. The wood in the tips should all be very light stock. All the ribs are light quarter-grain 1/16 sheet, except for the ribs at the tip polyhedral breaks which are 3/32. There's a reason for the strange plan layout. Try building the tips in one piece, and the same for the main panels. This way, a very closely balanced wing can be built. In addition, you prefab­ ricate all the spars, ribs, leading and trailing edges, it is super-fast. Leave out Plumbing is simple and direct. A Bahrman pacifier resides in hole, which is epoxy lined. Tatone Cut-Off timer, and Kraft-Hayes mount complete facilities for .19 Super Tigre. the rear bottom spar until the truss ribs are all cut and fit into place. depth. Place the bottom spar over the ply at the L.E. joint, and only on the The truss ribs are all put in as rect­ notches already in the straight ribs, and front side of both bottom spars. The angles (slice a 1/16 X 3 X 36 sheet into drop the blade down into the truss T.E. joint is just glued and taped, and three I X 36 inch strips), and leave them ribs, using the spar as a guide, the blade if fit well, will be more than strong square on top for the time being. When flush against it. Pull up the spar, knock enough. fitting in the truss ribs, block up the out all the pieces, and check the fit. Before putting the dihedral in the leading edge of the right main panel Should be perfect. Double glue, and wing, trim all the truss ribs to shape, 5/16 of an inch at the far right corner, push the spar in place. and with a large sanding block, carefully to build in the wash-in. Same goes for Now pin the wing back down, right- sand them all down flush with the top the trailing edge of the wing tips; block side up, wash-in and wash-out blocks of the straight ribs. Carve and shape the them up 1/8 inch for wash-out. in place. Be sure to double-glue all parts leading edges to the shape shown, and Now let your Titebond (thinned 1/3 with Titebond; brush a coat on both do the finish sanding on all the wing water to 2/3 resin) dry overnight . . . surfaces, let the glue set a few minutes, panels. Now, after the dihedral is in, You can go on to the stab while this then re-coat, and assemble the parts. all that remains to sand is the joints. I dries. Later, another coat is brushed around usually leave the 3/32 sheet tips ‘till After the wing is dry, pull it up, and every side of every joint. Don’t try for a last, but they could probably be put in flip it over. It will sit steadily on the fillet, just let it soak in. If the joints all and sanded to shape more easily before flat tops of the untrimmed ribs. The fit well, a super-strong structure will re­ the tip panels are on the wing. notches for the rear main spar can now sult. The stab is very simple. Keep it light, be cut at the precise angle to which the Although not shown on the plans, and flat. If you use the D.T. system spar passes through the truss ribs. Ce­ I use 1/16 ply dihedral braces at the shown on the plans, you’ll have to build ment a SHARP razor blade to a piece L.E., T.E., and on both sides o f the in the 1/8-inch ply D.T. stop-key/rubber of scrap, so that the blade protrudes a bottom spars at the center panel breaks, hold down, and be sure it is very secure­ quarter inch. This makes an excellent plus nylon tape over the L.E. and T.E. ly cemented in place. I like this system tool for notching the ribs to the proper joints. To keep the tips light, use 1/16 Plans and more text, next two pages.

DT snuffer tube is mounted across fuselage. Keys are important for consistent and continued alignment. Ship is finished in black Hobbypoxy Note evidence of R&D on fin area. fuselage and . .. er . .. pink tissue wing and stab. Snoopy turns up just about anywhere, not so?

The MODEL BUILDER 23 -ALUM TUI

needed, and hence, there is nothing to time consuming part of the airplane, including sheeting, fin, sub-fin, and so hang up, which could result in no more and I always built it last. I like to have on, bolt on the motor and gear, and put Satan! Trim the key to give about 40 the wing and tail covered and doped by on the wing and tail. You have to give degrees of pop-up, and make sure it is the time the fuselage is nearly done, so an educated guess as to how much long enough so as not to allow the stab that they can be strapped to the body, weight the finish will add to the tail of to come off. I've never lost a stab, but and the center of gravity checked prior the fuselage, but if anything, you want a for the weak at heart, put on a limit to the pylon being permanently affixed. slightly nose-heavy model. It takes very wire if you must. I build as much of the body as possible, little ballast to move the C.G. back, and

2 4 The MODEL BUILDER .-SURGICAL TUBE

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ioD IL —iui|.D«PI/- Plan No: 3732 SATAN M K . I H 1 9 7 2 WUiS 8.32-44 44tflATL£SS SHT TIP PLATES) PANELS MAIN· »7.92, CNTR 12 8.TIP-80 AREA · 5 20 SO IN - S I M 704-328(LESS SHT TIP PLATES) AREA-231 SQ IN 44 4 AIRFOILS WING 10* H P· 34*(2995 FROM Li} 832 AT H PfREAR TOP SPAR) STAB 9* HP 342(2 3934) 433* AT H P (REAR TOP SPAR) APPROX WEIGHTS(lNGRAMS) STAft-40 WING- 128 FUSE 2O40W TIMLRGCAR MNT) wts given trom finished S2o satan

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VAILABLE - SEE PAGE 64 them out (ACCURATLY!) Cut the py­ large side, and then trim with a straight a bundle to move it forward! Slide the lon formers to 5/8-inch depth to accept edge down to the proper si/e. pylon back as necessary, but not more the pylon, but leave the pieces in place, Tack the tail together, pin it down than half an inch. Still going to be tail and center mark all of them too. Cut to the center line, then proceed with heavy? Better check that stab weight, out the fuselage sides, and be sure there the formers. The nose, back to the and build another one if necessary. is no bow up or down in them. second former, has a 1/16 ply, inside I recommend building the fuselage Frequently, when you cut a long doubler on each side, and a 3/16 balsa upside-down on a good centerline. Cen­ sheet of balsa diagonally, it will bow doubler on the inside of that. Sec detail ter mark every former when you cut somewhat, so I cut them a bit on the Continued on page 58

The MODEL BUILDER 25 PHOTOS BY GEORGE BAHRMAN As the late-night television MC's always say, "Here's a man who needs no introduction!" If you're an active free-flighter, you should know him . . . if you don't, it's about time you did . . . TOM HUTCHINSON.

® I’ve always thought that I ’d make a like speaking in a vacuum. WHICH DESIGNS ARE great columnist, so when Bill Northrop However, now that I ’ve managed to THE WINNINGEST? made me an offer I couldn’t refuse...I get this far, the feeling o f power is start­ Earlier this year, a letter in American agreed to take over what Mel Schmidt ing to come to me-like a South Ameri­ Modeler questioned the Satellite’s claim had done such a good job o f starting. can army officer taking over the govern­ of being the “ winningest AMA power Since I ’m naturally egotistical, opinion­ ment radio station. Keep those cards ship in the country.” It said that this ated, thin-skinned and vengeance-mind­ and letters coming, and maybe this might be true for the West Coast, but ed, I don’t figure to have any trouble thing will get going well enough that certainly not for the entire country. getting some response from my readers I ’ll be able to emulate my journalistic This made me curious . . . so I set out to (both of them, only one of whom is re­ idols (Horace Greely, Jack Anderson determine which designs were doing all lated to me). But, an initial column like and Hugh Hefner), so we can have some the winning in Southern California. this is hard to write (which is probably sexy West Coast muckraking. And let us Early results (for the first half of the why I’m writing this part last). With no­ begin with . . . year) were printed in the Thermal thing to build from or reply to, it’s a bit Thumbers Bulletin, and now that the contest season is over, the final results for 1972 can now be tabulated. The results o f all FFMAASC contests in Southern California were accumulat­ ed and point values assigned to each contest placing (5 points for 1st, 4 for 2nd, down to 1 point for 5th). I did this for individuals first, then broke it down to each design, based on what I knew about who was flying what. (This was not too hard, since most o f the winners were familiar faces at nearly every con­ test. However, the Starduster may have gotten less credit than deserved, since most o f the unfamiliar faces were prob­ ably using them). The final results indicated that South­ ern Calilornia is "Starduster” country, with Sal Taibi’s design narrowly nosing out the Texan in overall points (98 to 95). Breaking down the results into small 1/2 A & A) and large (B & C) cat­ Our columnist for this, and we hope, a lot of future months, Tom Hutchinson, about to turn egories shows the Texan at the top of one loose at Lake Elsinore, California. the list in B - C, and my Maverick/Bur-

2 6 The MODEL BUILDER rito Brother leading in 1/2 A - A. It ’s interesting how many of these designs are former NFFS models of the Year (if a similiar compilation is done in other parts of the country, next year’s selection committee could have some­ thing more concrete to go on). I t ’s also interesting how old some of these win­ ning designs are . . . the Starduster and Texan were first published a dozen years ago, but are still winning, despite rule changes along the way. K it models also showed up well, but that’s to be ex­ pected, since such a listing tends to re­ flect how often a particular design is flown. . . . 1/2 A... Starduster 33 Maverick 32 SHOCcr 25 . . . A . . . Galaxie 48 Burrito Brother 40 SHOCer 16 Starduster 16 . . . B . . . Texan 23 Satellite 14 Faulker (orig.) 13 ...C... Texan 42 Southern California's most winning design, according to Tom's analysis, is the venerable Taibi "Starduster." This is designer Sal's son Mike, w ith a 600 sq. in. version at Taft. Starduster 41 SHOCer 36 Starduster 98 Diez (orig.) 21 . . . 1/2 A/A .. Texan 95 Mav./Burrito Bro. 72 SHOCcr 89 WHAT’S NEW AT COX? Galaxie 68 HL Glider Dale Kirn was a special guest at a re­ Starduster 49 Polly 68 cent SHOC club meeting, and revealed .. . B/C . . . Sweepette 31 some good news for 1/2- A flyers. Texan 65 Flash 18 Dale’s been working closely with the Starduster 49 A/2 Glider Cox factory on getting some o f the pro­ SHOCer 47 Dragmaster 74 duction bugs out of the Tee Dee ,49’s, Gas (overall) Sleeper 41 Continued on page 63

Second best design, in Tom's report, is the Texan. Tom Carmen tunes Third most winning SC design is the SHOCer, by |\/|e| „ the McCoy 60 in this 1000 sq. in. model of Ed Miller's design. were published in the Jan. 1972 issue of MB. and are Cllm'cft. Plans The MODEL BUILDER S,,M ^ i l a b l e .

2 LOOK LOOK AGAIN THOSE ARE . . . FULL SIZE PLANS !!!

The MODEL BUILDER LIL Ftě&B 7» ΜΡΓΡ'ς a livinq room model for rainy days or to scare :'s a bird.1" "Iťs a plane! ' "No, it's Flapper? Here s a " v'n9 HA1_ COVER I out of that crocked '··■ thick aluminum sheet (disposable alum­ of quiet smooth indoor flying and gives ^ S o m e years back I flew all types o f inum pie plate will work well.) Holes many hours of entertainment. indoor models quite extensively and one can be punched in the sheet with a piece The Li’l Flapper can be flown quite o f the most interesting was the orni- of .012 piano wire sharpened on one thopter. They seemingly appear to eith­ easily in a living room, and with luck, end. It is best to punch the holes in the er fly well or tear themselves to shreds. flights of 45 seconds can be obtained. sheet prior to cutting out the various The small ornithopter presented here The little bird is easy to build and ad­ parts. The thrust bearing is made in a is a 1/3 size version of one which I de­ just, but it is important to make all similar manner using .020 aluminum. signed and at one time held the Categ­ parts as shown and they must fit cor­ ory I National Record. As a result o f rectly with no sloppiness, otherwise the WING that ornithopter’s success and ease of life span of your bird will be quite short The center section is made from 1/32 adjustment, I decided to see how small . . . or in some cases it may even beat it­ sq. stock and with the ribs cut out o f one could be built and still fly. When self to death. So follow the plans and 1/32 sheet. The flapper spars are made this one was finished and flown, I was instructions carefully and have fun. from 1/16 square tapered to 1/32 round. quite pleasantly surprised. You will FITTINGS Be sure they are made from the same find it well relieves the monotony of All fittings are made from .004 Con tinued on page 61

The Flapper is structurally very simple. The problem is, however that the structure is MICROSCOPIC! mou«U ,eS** Vour Flapper in the house, just make sure the fam ily 03 C e r's outside! It looks and sounds like a bird in flight. The MODEL BUILDER 2 9 scheme evolved by the Bridgeport, Conn. Flying Aces club, extra marks are awarded as follows: Low-wingers I ; Biplanes 3; Triplanes 5; Autogyros 7; Helicopters 9; Flying Boats or Float types 3. The object is to provide a welcome relief from the usual parade of “ safe” but dull Cessna and Piper configurations. The overall spirit of the Miami rules is: “ To encourage the build­ ing and flying of realistic models o f real airplanes that consistently fly well. It must be fun.” MODERNISTIC MODELS Close on the heels o f Mooney’s .... Being a potpourri of miscellaneous “ Bag o f Peanuts” plan offering, was the aeronautical ramblings. . . By BILL HANNAN arrival of Hal Swanson’s collection of Peanut Scale Plans, which consists of WHAT'S IN A NAME? an item on their scale judging sheet 18 sheets measuring 11x17 1/2-inches. # W e had been hearing rumors to the which provides bonus points for out- Included are such diverse subjects as The effect that Pirelli rubber had a new of-the-rut aircraft subjects. Similar to a Continued on page 51 manufacturer, and now, evidently it is official. The new name is Filati. Rather reminiscent somehow of something from a B grade Hollywood auto racing movie (You mean, when the hero got a "Filati" tire? E d ) A t any rate, lets all hope that the quality control improves. FREE FLIGHT LIVES! The doom-sayers who have been pro­ claiming the demise of free flight model­ ing might care to reflect on the follow­ ing statistics: During the recent San Valeers Annual F/F Contest, there were 277 entries, and 1110 flights . . . of which 277 were “ Maxes!” ON THE FLORIDA SCENE We received a nice letter from Dr. John Martin, of the Miami Indoor A ir­ craft Model Association, who reports lots of activity in that area, including hand-launched glider, Easy B, Penny Plane, Experimental, Scale, and Peanut Scale. We were especially impressed by

Happiness is beating the old man at his own game! Bill Stroman's son Ray picked up a plaque and a Peck Polymers Miles M.18 Peanut kit at the last Flightmasters ROW contest.

MAN'S VTO man, Dave Linstrum. We thought Lincoln Beachey's "Little Looper," one of the aerobatic aircraft featured in a new book, you might want to know what he looks like! "Acrobats In The Sky." See text for more information. Ship is an Μ & P "Midi-Pearl."

3 0 The MODEL BUILDER PEANUT TRAVELAIR 2000 By DON BUTMAN. Proof that realism doesn't have to suffer as the size gets smaller, this little T-Air has it all. A nice thing for Juniors too; the nearest school yard can be it's flying field.

φ ” bi-plane/‘bi-,plan/n: An airplane pictures states "... high (800 ft.) over plug and mating opening in the fuselage with two main supporting surfaces the Wichita countryside at full throttle, will provide tight and durable wearing placed one above the other.” So says 72 MPH!" This magazine article, plus surfaces to keep the nose plug from fal­ Merriam Webster's Pocket Dictionary. the re-issuance o f B ill’s plans in the ling out after the motor unwinds. This definition is true for the Travel- Model Builder, pushed me into peanut Continued on page 53 air 2000, but it lacks in expressing the scaling the travelair. appeal that this airplane has for certain The model is built in the usual two-winger buffs! This is the 4th Travel- fashion . . . 1/16 sq. sides, formers, air 2000 that I have built from Bill 1/32 x 1/16 stringers, 1/32 sheet around Northrop’s plans, though it's the small­ the nose and cockpits, and a bunch of est of the lot. 1/32 sheet wing ribs. The engine cowling The May 1969 edition of Sport Fly­ protrusions are shaped blocks and the ing magazine featured Travelairs. This front and "spinner” are o f one piece included a story by Max Walton of with the prop 'way out in front. Stick­ Wichita, who restored a Travelair 2000 lers for fidelity may prefer to move the because he needed a test stand for an prop back a 1/4-inch or so and build a OX-5 engine! The result was a beeyouti- spinner around it. Five minute Epoxy ful blue and silver Travelair 2000 that works very nicely for securing the land­ became a flying test stand. An inter­ ing gear wires and attaching the fairings. The "bones" of Don's little 13" Travelair. esting caption under one o f the flying Also, a light coal of epoxy on the nose Ribs could be thinned out a little to simplify.

Great shot of the little T-Air climbing out from Don's inspiration for this model came from our 2" scale Travelair, plans for which were published launch. School yards are big enough. in the July '72 issue of MB. The reduced mag plans were almost Peanut scale!

The MODEL BUILDER 31 S T R U T lOC/lT/oA/S Putt, putt, putt! Ed Slobod's Jumbo Scale Pietenpol Aircamper takes off for the wild blue yonder. If it wasn't for that big prop

FREE FLIGHT SCALE By FERNANDO RAMOS

φ Ο η December 4th, the N.A.R. Flight- As with so many events, Jumbo has doing it in the tradition of a Wakefield masters held a contest for both Jumbo had its share of growing pains. It started ship. Rubber Scale and Peanut Scale. Jumbo out to be a type of old timer event So, for 1972, the rules were changed Scale is a specialized event for rubber where the use o f old plans such as in order to avoid the same situation that scale models having a wingspan o f at Megow, Peerless, et al, was encouraged. has occured in the past. This time there least 48 inches, and they must carry a The model had to have a pilot, and it was an equal distribution of points be­ pilot. I think you’ll agree that this is a was worth 60 of the 100 points allowed tween fidelity-to-scale, workmanship, pretty fair size model to be powered by for judging (The reason being that judg­ and the pilot. The flying rules were rubber, and you won’t find a prettier ing on each model could be done very changed so that a model’s flying points sight than these "biggies” in the air. quickly). Thirty points was given to could not exceed its scale p oints. . . the Those of you who don’t live out on craftmanship/scale and 10 points bonus same rules that are in the 1972 AM A the west coast may wonder why any if an old timer plan was used. Flying rule book for indoor scale, page 16. club would be foolish enough to spon­ points were based on the best of several (I personally would like to see these sor a contest in December, however, for flights up to a max of three minutes. same rules used for outdoor rubber the past four years of this contest, the Three minutes on a scale job is near scale.) Out of all the models entered weather could be termed from great to impossible unless one has a "ghost-type” only one had more flying points than sensational! No doubt, the west coast is of scale model, and for the past three scale points. the place to be for year around flying. years this was the kind of model that Very few models are built from old (Stop rubbing it in, Fernando! WCN) was consistently winning Jumbo . . . timer plans, but rather, are enlarged

- S R a » 1 · **■ Tom Laurie holds his Bellanca Airbus while Jack Elem tries to see The Airbus silently takes off for one of several fine and realistic past his cigar to release the winding hook. flights. Scene is Sepulveda Basin, near Los Angeles, California.

3 4 The MODEL BUILDER This sign depicts the relaxed, good-time atmosphere that is typical Jumbos line up for static judging after the flying is over. Ray Berens' of all NAR Flightmaster contests. The name of the game is FUN. Sky farer, foreground, enlarged from Earl Stahl drawings, was winner.

All eyes are on Ray Berens' Skyfarer as he releases it for a winning flight, Vic Castanzo. left, coaching. Well known full scale sailplane photographer, George Uveges, w ith camera. from a good 3-view drawing. The scale didn’t have the duration to compete is better and the flying times are reason­ with some of the more conventional able. Hal Cover, who has dominated this designs. event had the most unusual, beautiful The most detailed model was of a model of a Fockc Wulf 152. It had no Pietenpol Aircamper belonging to Ed stringers and was constructed partially Slobod. Ray Berens, who won the event o f foam with balsa covering. this year, was flying a Skyfarer. This The Peanuts line up for inspection. The "huge" The model had a camouflage paint model flew beautifully and also had jumbo in foreground is a Curtiss Robin. scheme with all of the panel separations, some rather high times, jim Adams the model completely trimmed out be­ and the pilot was something else. He came in second with a Cessna AW that fore the contest (sound familiar?) but looked as though he belonged to the was feather light and his flight points it was soon putting in some rather Jagdstaffel. In order to keep the weight reflected this. The "old professor," Walt realistic flights. as far forward as possible, Hal used two Mooney, was flying an Empanema, The Peanut event was run at the short rubber motors with return gears. which appears to be the Japanese ver­ same time as the Jumbo, and it was It was a beautiful but complex set-up sion of Piper’s Pawnee; this model took something to sec the two different that worked extremely well. The model third place. Another unusual plane was classes of models side-by-side; the differ­ would R.O.G. (which is required) like that o f Tom Laurie’s, a Bellanca Airbus. ence between their rubber motors could the real plane. However, the 152 just Tom didn't have too much time to get certainly be expressed in dollars rather

Hal Cover, designer of this month's Flapper, built and flew this beau­ Come on, Fernando! Jim Adams isn't pulling that hard on the rubber tiful FW 152. Balsa covered foam w ith stunning paint job. while winding his Cessna AW. Ship is very light and flies well.

The MODEL BUILDER 35 Fernando's well used 1911 Cessna. After winning it's last two in a row, it w ill now be retired, Doug Mooney's Demoiselle plays tag w ith the and reside in Russ Barrera's museum, much to the peace of mind of other Peanut contestants! rafters in Las Vegas school gym. It's a peanut.

Two Bellanca biplanes (Oct. "72 MB) at Las Vegas. Ship on the left Another look at Doug Mooney's Demoiselle. Plans can be obtained belongs to Fernando; other owner not known. from W.C. Hannan, see ad. FH wheels add a lot to any scale ship.

than cents! Peanut scale has gained na­ Peanut Scale has assumed the duties of soon crowded with small flying objects. tional popularity, and for good reason. "Ambassador of Rubber," not only to Duration is really the main criteria lor It is a great starting poini for juniors Juniors, but to modelers of all ages and Peanut and it’s quite amazing how long to be introduced to flying scale with interests. Our mail indicates that in par­ these models can fly. I was fortunate to a minimum of effort and expense. They ticular, many R/Cers who came into the come in first with my old and tired are easy to build and easier to fly, and hobby through R/C, are "discovering” 191 I Cessna. Bill Hannan was second seldom ever get damaged. And best ol what modeling has been all about these with his outstanding Turbo-Porter, and all, there are many plans and a few kits many years, and are thoroughly "hook­ Herb Barsky took third with a Poulin. for these models available . . . more on ed " on the little beasts. WON) Everyone had a good time and that’s this later. The Peanut scale part of the contest what it ’s all about! (It's also interesting to note that went without incident as the sky was Continued on page43

On New Years you wear silly hats, right? Bob Haight (It) and Bill Would you believe a Russian Flying Motorcycle? Bill Stroman's Warner prepare Bob's Waco for a hop. Warner's hat a "regular." model flew quite well. Would you call it a "tandem biplane?"

3 6 The MODEL BUILDER F/FAI

Denmark's Tom Koster demonstrates ballet form as he launches Flapper at World Champs.

Ø B ack in 1961 I had a call from john­ ber, as well as to study the quality of of running, plug burning stopped, but ny Broadbcck asking me if I would like machining, we ran the engine on the compression was by now very low. to try the new K&B .15 engine. It had official F.A.I. lucl of 75% methanol and Using the FHeathkit “ Thumb Tach” been designed, engineered and test down 25% castor oil. We used about all o f the we got the following figures on 75-25 in C/L speed, not only in the American fiberglass props that are around and fuel: speed circles, but also in Europe. Before ran it until the first piston and sleeve PROP SIZE RPM going into production, the prototypes of set was worn out. Several plugs were Bartel’s 7 x 3.5 23,000 the K&B series 6 1 had established sever­ also tested to f ind out if there could be N.F.F.S. 7 x 3.5 23,200 al world speed records, in the hands of a possible improvement in R.P.M.’s. Van Nest 7 x 3.5 23,200 its creator, Bill Wisniewski. Overall engine performance indicates Vela 7 x 4 22,000 Trials for the semi-finals were close a very fast engine with easy starting and These f igures were recorded using the and I was set up with the very depend­ smooth running. Needle settings are not plug for the standard squish band head. able Oliver Tigre diesels, but was always critical, with only a slight tendency to The inlays with different chambers were searching for more power. The invitation overlean . . . typical characteristics of Continued on page 51 was loo tempting to decline, so obvious­ the Schneurlcs! When in full compres­ ly, I accepted. sion, (the engine has become loose but The following Saturday, we met in not over the hill) it burned out a plug the field at Chino Airport. Assisted by on every run, with no difference in Wisniewski himself and witnessed by brands or types. Al ter some 10 minutes johnny B., we installed the K&B. The impressive demonstration of power was shocking. My airplane went up with a speed never before experienced by me. This was the first of the new K&B series. Now, after more than a dozen years, another new K&B has come out of the nest. Again, we had to be the first one in F/F to try this new K&B. We test ran it first on the bench and then flew it in one of my well tried, and tired birds, “ The Mole.” After dismanteling the engine first to examine the characteristics of timing, The new K & B schneurle ported 15 engine. Al Vela flight testing tne new K&B 15 in his the porting, and head combustion cham­ FAI version for 75-25 fuel not yet available. " M u le ."

The MODEL BUILDER 3 7 SINK NORMAL GLIDE ZERO SINK CLIMB ZERO SINK SINK (-2 FT/SEC) (±0 FT/SEC) <+l FT/SEC) (tO FT/SEC) (-1 FT/SEC) (-3 FT/SEC)

GLIDE PATH

fc ^ f ...... RELATIVE SINK

\

SAILPLANE RATE OF SINK: -2 FT/SEC ______'·· \

DEAD AIR LIFT LIFT LIFT LIFT DOWN AIR (±0 FT/SEC) (+2 FT/SEC) (+3 FT/SEC) <+2 FT/SEC) <+l FT/SEC) (-1 FT/SEC)

LIFT CONDITIONS

10-SEC TIME INTERVALS

SINK RATE PROFILE

R / c SOARING .,™ THERMAL HUNTING FOR FUN AND PROFIT .... or ... All that comes down must go up . . . firs t.. . OR, 'Tis better to have lift and lost than to never have lift at all . . .

^ “ Hey, Mac. How ya make it go up?” not many· guys have ’em . . . Yet. ute displacements or speed changes of “ Pull back on the stick, Dum m y!” When R/C soaring "au naturel,” so the sailplane.” It requires more than You can learn a lot hanging around a to speak . . . without the aid of a ther­ good eyesight. It also takes intense con­ flying field. Watchin’ . . . And listenin’. mal sensor . . . the line of communica­ centration. “ Flying” means “ sensitive Some of it may even be worthwhile. tion between man and machine is that, control manipulation in response to ob­ Like how to soar an R/C sailplane . . . of sight. If you can’t see it, you can’t served changes in displacement or speed using thermals. The way birds do. But fly it. In thermal soaring, "seeing” of the sailplane so as to exploit meteor­ ya gotta know what to look for. doesn't mean just looking, and “ flying” ological phenomenon which are poten­ Electronic gadgets that feed airborne doesn't mean just driving around. In tial advantageous, and to negate deter­ intelligence back to the ground-based successful R/C thermal soaring, "seeing” iorating conditions.” How about that pilot are becoming more common, but means “ immediate recognition of min­ jazz? it’ll be awhile yet before visual observa­ tion is obsolete. If ever. These devices . . . which are really rather sophisticated telecommunication systems . . . can be purchased by anybody with the desire and a bundle - a - bucks. They can be built by those who have the time and talent. And they can be a real help when properly operating and intelligently used. It may very well be that the age of electronic thermal identification is the coming thing. Certainly the added soar­ ing capability potential with such equip­ ment is intriguing. However, this addi­ tional hardware neither guarantees nor is required for sustained flight. As one gentlemen proponent commented, “ A thermal sensor won’t make a sailplane go up, but it helps you know when you are in lift.” Most pilots fly w ithout them Annette Faure applies a little "body English" as she brings her Windfree toward the spot. . . . if for no other reason than because Scene is Estancia High School, Costa Mesa, Ca., at m onthly Harbor Soaring Soc. contest.

3 8 The MODEL BUILDER There may be many variations in the technique of R/C soaring, au naturel. It’s hard to say. Those guys who really know how make it look so easy. Some­ times it would seem to be all luck . . . no skill involved. However, upon check­ ing average flight times, it becomes im­ mediately evident that these “ Thermal Tigers” are consistently lucky . . . week after week. In fact, their good fortune in putting up long flights is such a routine thing that it makes one wonder DEAD OR DOWN AIR RISINC AIR if they cheat. . . like maybe not depend­ ing on blind chance, but actually work­ ing the problem. Those of lesser ilk undoubtedly can learn by observation and example. We may even change our luck. But there RISING AIR CA N TURN SAILPLANE AW A Y FROM LIFT seems to be a “ sense” of flight . . . a “ feeling” for lift . . . a "hunch” where that’s the way it is. A sailplane is always plane is still sinking. Honest. But only "u p ” air can be found. This skill may sinking . . . unless parked on the in relation to the surrounding air. . . not be imitated on occasion (In free flight, ground . . . or being towed. with reference to the ground. So we they calls it "Piggyb ackin gW C N ), or The theory and practice o f soaring don’t care. even be learned. Or, it may be a "thing” is to seek out and utilize air currents Take an example. Say your latest that either ya got or ya don’t got. Sure which can carry a sailplane upward. Aerodynamic Marvel (AM) has a rate o f hope that’s not the case. Such currents must rise at a greater sink of 2 fps in "dead” . . . no lift and If you get the opportunity, listen velocity . . . measured in feet per min­ no down . . . air. From 100 feet o f alti­ when a Thermal Tiger is coaching a ute (fpm) or feet per second (fps) . .. tude, it would take 50 seconds to glide friend. You’ll hear things such as "Okey. than the sailplane’s inherent rate of to the ground . . . excluding ground Next time around, hold it straight for a sink. When this happy situation is en­ effect and other esoteric niceties (Aw, second. Then start circling again;” or countered, the sailplane can increase its cut it out, Le! WCN). Now consider “The lift’s over to the right a bit;” or, altitude. When the “ up” air is equal to what would happen if, instead o f dead excitedly, “There it is. Ya got it. See . . . that is, has an upward velocity air, your AM were gliding through air that lift? ” While evesdropping, keep a equivalent to . . . the sink rate of the which was rising at 1 fps. In this situa­ close eye on the sailplane they’re flying. sailplane, the sailplane can sustain its tion, the experienced rate o f sink has You may not recognize one item of evi­ altitude. This condition is called “ zero been reduced to 1 fps, and the sailplane dence which would be cause for such sink” for obvious reasons. When the takes 100 seconds to come down from dialogue. Also, notice the sailplane start­ “ up” air has a velocity rate greater than the 100 foot height. The inherent rate ing to get smaller as it goes up. It’s al­ the sink rate o f a sailplane, the sailplane of sink has not improved from the 2 fps most enough to drive one to powered can climb. This condition is called . . . but the upward moving air slowed flight . . . but not quite. Have faith ... “ Whoopee.” But, in either case, the sail­ its descent, in relation to the ground, to maybe we can learn. Now anyone who tries to b lu ff his way through in this R/C soaring sport . . . or tries to “ fake it ” as an expert, either on paper or on the field, has got to be some kinda nut. Therefore . . . accordingly ... . and forthwith, the fol­ lowing discussion is offered as a report o f techniques observed during several years hanging 'round the flying fields . . . interspersed with short duration hops to verify the obvious fact that “ No, Dummy. You ain’t got it yet. Keep watchin’.” O f course, we were only shooting landings, anyhow. So what's the big deal? Now here’s a bit o f news: a sailplane does not have on-board climb capability. It’s fascinating what new worlds of knowledge are opened for us by the printed word. Anyhow, a sailplane has no power of its own, and therefore can­ not increase its altitude or even sustain a given altitude without the help o f an outside force. Physics is physics, and

The MODEL BUILDER 39 only 1 fps. A happier example. Air rising at 2 fps. Same AM sailplane has same 2 fps sink rate. The result is that it holds al­ titude . .. stays the same distance above the ground. “ Zero sink.” Now comes a stronger thermal . . . 5 fps. Fabulous AM sailplane goes up at 3 fps. “ Whoopee.” One more. “ Down” air at 1 fps. Same old stupid dog of a sailplane sinks to ground at 3 fps like the proverbial rock. This sport is no fun anyhow. Let’s go home. And that’s all there is to it. All you gotta keep in mind is to fly only in rising air. If you can’t find any, why not just land? Since we can’t push a throttle and go “ up,” it’s only reasonalbe to assume that we look for some outside help. The answer is this rising air gimmick . . . thermals. It may sound like a put-on, but the first and certainly most important step to successful thermal soaring is to get a good, high launch release. It’s basic. Once the power of the tow . . . be it winch, hi-start or otherwise . . . is gone, for a “ floating” release when the tow- an intense competitor, and flys as beau­ that sailplane is on its way down. The line is about 20 degrees or so short of tifully as he builds. OFB was well up higher the release, the more altitude vertical. A shallow climb . . . or delay in the standings on the second contest and, thus, the more time available to in going steep . . . or waiting to release day, and going for broke . . . as it came hunt for lift. Remember, thermals are until the towline is vertical with the to pass . . . on his launch for the last often kinda like inverted cones. . . wider ground, and you're not getting maxi­ flight round. Nothing particularly un­ as they are higher . . . and also stronger mum height. usual . . . steep and getting good alti­ at altitude . . . and thereby easier to When on launch, watch for thermals. tude. But about half way up, a ther­ find and use when you’re just o ff the A rapid increase in rate o f climb may mal. The noise sounded quite like a tow. indicate that you’re flying through lift, rifle shot . . . quick and sharp . . . and How to get high? Avoiding the op­ or it could just be a wind gust. Which­ one panel was gone. That was it. No portunity to play with words at this ever, it can add a lot of load to the warning. No bend. No bow. One dead juncture (You beat me to it! WCN), sailplane’s spars. Be alert. bird. Obviously, Scott, as do many let it be said that launch technique A t the Harbor Soaring Society’s strong competitors in any sport, was could well be the subject of another dis­ Western R/C Soaring Championships in pushing his machine to the edge. The cussion. However, the primary idea is to 1970, Old Flying Buddy (OFB) Scott additional loading imposed for a split climb as steeply as possible immediately Christensen, LSF/001, gave a dramatic instant by that thermal took it over the after takeoff, then to round out and try demonstration of over-stress. Scott is brink. But thermals on tow can also present opportunities. Most pilots, grateful for any small bit o f luck, will accept the ex­ tra umph from a thermal for a slightly higher launch, and fly on to normal re­ lease. On the other hand, a real Thermal Tiger will sometimes release . . . that’s right, terminate his two . . . at maybe the half-way point or so, to take advan­ tage of a thermal. This takes self-confi­ dence, skill and, as far as we more common types are concerned, courage. It also represents the kinda flying that sorta separates the men from the boys . . . or at least the “ front runners,” to use a current political phrase, from the “ also rans.” Perhaps the latter are R/C

· .· ψΧ-'t soaring’s “ silent m ajority.” A fantastic example of thermal-on- Roland Boucher, Astro Flite, about to stomp on the winch switch to get his AS-W15 airborne at last summer's LSF tournament. The 132" span ship is company's latest kit. Continued on page 54

40 The MODEL BUILDER J pm SPARKS

/ τ γ By JACK TRANSUE

(To set the mood for this month, we give you the following quote by Dell Rheaume, editor of the SCIF’s (South­ ern California Ignition Flyers| news­ letter: WCN) For the first time this year the San Valeers added a full slate of events for Old Time models to their Annual. The experiment was a rousing success, as was their whole meet, despite the bad start. Saturday the winds stopped all flying, but Sunday was a grand day in every way. After they decided to hold the full two-day slate of events on Sun­ day, but limiting all events to 2 officials instead of 3, the fun began. Some 132 contestants made 365 entries and the air was crowded at times. Old Timer entires made up 12 percent of the total, and the mix of Old Timers and con- tempo planes in the air, as in the Free Flight Champs, was most interesting to a ll.. . especially when Otto Bernhardts Lanzo chugged over the flight area, cutting a stately pattern through con- tempo VTO's. AH eyes were on it, for Μοβ is telling Hugo Lung, vice president of the SCAMPS, "I think I'd like to "people''around it was a slice of history passing over­ w ith these things." Moe's owner, in striped shirt, is St. James Davis. head, a reminder to all of the breath­ Timer movement began in the early beginning, a standard automotive con­ taking changes of the past fifty years, sixties that this ignition system again denser was used, but today, most mod­ but also a rebuke to those who cannot became a part of model aircraft building elers use an ordinary radio or TV con­ free themselves of the present, who and flying. denser. Approx. .047 ohmns, 200 V. may forget that, as important as today Now before you go and start ripping and 20% tolerance will work as well as may seem, there is always a beginning, the ignition system out of the family anything. a glorious past that may still be enjoyed. auto, I should explain that the coil, If some o f you are new to modeling We've always assumed that anyone points, high tension lead, spark plug, or just to the old timer movement, and who ever built a model aeroplane knew etc. in the diagram were designed speci­ are still in the dark as to where to obtain how to wire up an ignition engine. Well, fically for model airplane engines. In the Continued on page 51 according to the latest independent poll, there are still a number of people out there in hobby land who believe that Ray Arden invented the glow plug for use in the Brown Jr. For these few, and others who may have forgotten, we’re including a wiring diagram of a typical model ignition system. As you can see, there was more than just a glow plug and a set of Ma Bells dry cells to furnish motivation to the piston. Take a look and you will see such mysterious ob­ jects as a coil, condenser, ignition points, battery box, high tension lead, and spark plug; all necessary until about thirty years ago. With the advent o f the glow plug, this system has become all but obsolete. It wasn’t until the Old

The MODEL BUILDER 41 Nice place to go sail a boat! The Newport Harbor Yacht Club, Newport Beach, Ca. R/C yachts are the West Coast 12. a large boat displacing about 40 to 50 pounds. Photo was taken from the outside cocktail and dining deck I

ROD CARR

φ ΐ η October of each calendar year, Released by AMYA President Don ton Area which was being pushed by American Model Yachting Association Prough this month was a partial listing both AMYA and M YRAA skippers. The membership renewals may be sent in. of items which will be up for grabs at hope was to apply for AM YA sanction, New memberships are still tallied until the annual AM YA raffle. Donated so far and bring R/C yachting to the excellent December 31, but since we are so close are a SOLING Kit by VORTEX MODEL facility existing at Storrow Lagoon. to the end o f the year a quick look at ENGINEERING; a FLYING EAGLE Following Dick, we established com­ the class statistics for this rapidly grow­ hull by CARR’S BOATYARD; and a munication with Mr. Harold Belknap of ing organization is in order. The AMYA complete EC/12 kit made up of HART­ Woonsocket, Rhode Island. He armed us Secretary’s report of 12/2/72 indicates MAN hull and accessory fittings, with a list of potential skippers from a total vessel registration of 526!!! These CARR’S BOATYARD sails, and JOHN­ the general area, and we’ve been assist­ registrations are spread over 9 sanc­ SON ENGINEERING sail control unit. ing him as much as possible from this tioned classes and 3 others working All of these items will be on view at the distance to establish a group. Since toward the 20 vessel minimum. In cap­ AMYA booth during the Toledo Show. Harold is already skippering an EAST sule form: Drop by and say hello to the pirates COAST 12 hull, we expect that class Santa Barbara One-Design 124* from the Chicago Area Flotilla who will to be the probable choice. 50/800 (Marblehead) 119 be manning the booth. They’re not Since everything comes in threes (or East Coast 12-Meter 91* dangerous . . . just look a little rough!!! so my Mrs. says) I held my breath, and 36/600 50 From my vantage point as a mid- sure enough, the Greater Hartford Model 10-Rater 45 Atlantic PR man for AM YA, I ’m often Boat Club has taken itself by the scruff West Coast 12-Meter 22* the fellow approached by those who of the neck and is establishing a sail Regatta One-Design 22* want assistance in organizing a local division. A conversation with Bill Zebb Dumas Star ‘'45” 21* sailing group and applying for AMYA turned up a couple of vessels already Open Class 21 Sanctioned Club status, with the con­ in the area, and we convinced him to International A Class 7 comitant liability insurance which ac­ take this year’s C.H. BLACK TROPHY American X Class 3 companies such clubs. As such fledg­ SERIES winner (12US300, MAHALO Half Meter 1* ling groups make their presence known II) o ff our hands. I ’m awaiting later in­ * —Indicates a one-design class. I ’ll try to remember to bring them to formation from the group who were to A quick look at the relative numbers your attention, as well as any individuals undergo their early planning discussions indicates a couple of leading one-designs who contact me with a plea for help in in mid-December. and the popular 50/800 holding down establishing a group. This week was a We’ve finally heard from the CEN­ over 60 percent of all vessels registered. bumper crop for such activities. First, TRAL PARK MODEL YACHT CLUB. Both of the one-designs are available we heard from Dick Jansson of Wellsley, Mr. L.V. Goodrich was kind enough to as kits and new vessels have now started Mass. He informed us that an organiza­ contact us, after we had tried unsuccess­ to appear in that form for the 50/800 tional meeting was scheduled and a new fully for a year to obtain a response class also. club was expected for the Greater Bos­ Continued on page 53

4 2 The MODEL BUILDER This is the first time I have been able to make it, but you know it has to be a good contest. Otherwise, why would I pack a four year old son, a three month old baby boy, all o f their required paraphernalia, and my wife; get up at the crack of dawn and drive 300 miles? The meeting place for all contestants was Vulture member Bob Haight’s home, where he hosted more people that I could count. While the children played, and the women talked about whatever women talk about, the men gathered in Bob’s workshop. Believe me, words cannot describe this “ far-out” place. It ’s like going into a small version of Russ-Craft’s model museum, with almost as many airplanes hanging from the walls and ceiling. As expected, the tall tales lasted into the early hours of the morning. The contest was to be held at ten o’clock in the morning at one o f the local high schools, with the gym being available in case the wind should be blowing. As it turned out, we did have to move indoors, but there were no complaints because it was quite cool outside. The Vultures’ contest included five different categories: Open, Antique, Profile, CO2 , and Jet (using Brown’s CO2 Micro-Jet). Most contestants had to make some adjustments on their models as they had been trimmed for outdoor flying. The contest lasted until two o’clock in the afternoon. During this time, great flights were made by nearly everyone. Each member of the Walt Mooney clan had at least one model to fly. They had in their stable no less than five two- place versions of the Volksplane. Bill Stroman, known for his taste in very unusual airplanes showed up with a Russian Flying Motorcycle, which looks like a motorcycle with two large wings, one fore and one aft. It flew pretty well. Bill Warner, who can build faster than anyone alive, had just finished a real “oldie,” the Valkyrie. He had built it just a few hours prior to our getting to Las Vegas. In fact, he was flying it in Bob’s living room as we walked in from our long drive. After the contest, we all adjourned

Full size prints of this drawing (24" wing span) are available direct from Harold A. Osborne, to Chuck West’s home, where we had 1932 Conejo Lane, Fullerton, California, 92633. Price is $1.00, including First Class postage. another excellent feed in his exquisite model shop, above the garage. When F/F Scale . . . . Continued from page 36 contest was held December 31st due to eating was over, the trophies were hand­ The next contest to teii you about the way the days fell on the calendar. ed out to all of the winners. These tro­ is another Peanut, but this one is un­ Another interesting point is that this is phies were quite unique. They were usual for many reasons. The contest is very much a family contest with many plaques made from willow wood, cut sponsored by the Las Vegas Vultures, wives and children attending. (Could to the shape of the state o f Nevada, with and has been held on January 1st for the it be the wives think they’re going to the head of a vulture mounted on it. past four years. This year, however, the Vegas for another reason?) In the Open class, the 1911 Cessna

The MODEL BUILDER 43 Duke's Crest. As per usual for these kits, it features top grade wood, proof-of- scale 3-views, step-by-step construction photos, nylon thrust bearing, plastic propeller, and wheels. The cost of the kit is $2.49. Many modelers may not be familiar with another railroad product called Solvaset. (Someone may take offense at my calling Solvaset a railroad product, but it was used by model railroaders long before being adopted by the plastic model fraternity.) Solvaset is used for the application of decals. What it does is to soften the decal so that it will snuggle down to the exact contour of the surface, without any distortion. There are other, similar products on the did il again. Dave Saks, Hying his Poulin come out with 18 flying scale Peanut market, but I have personally had the was a close second, followed by Herb models in the form of a plan packet best results with Solvaset. It certainly Barsky with his Poulin. In the junior which is available for $13.95 for all 18, makes decal application easier and the division, Doug Mooney won with a or $1.00 per plan. The list includes: result more realistic in appearance. Fol­ beautiful, weathered Demoiselle, while Fairchild KR-21, Mr. Mulligan, Hughes low-up with a spray application of Kenny Hannan took second with an HI, Avia B-534 IV, Waco 220, Beech Testor's Dull-Cole. This w ill take away Antoinette, and third went to )ohn Bonanza, Page Racer, Allenbaugh’s the shine of the decal. West with a Miles M I8. In the Profile "Gray Ghost,” P-5 IB, Chester "Goon,” Here’s a hint that may help you event, Warner won with his Valkyrie, P-5 ID, Stinson Reliant SR-8, Howard when you cover your next model with and Bill Hannan came in second with a DGA-15, Voughl OS2U-3 Kingfisher, Japanese tissue. Usually, when you use profile of a Hughes helicopter. Larry Stearman PT-17, Chester’s "Jeep," Cos­ balsa sheet to represent metal covering, Vance took third, but I was not able mic Wind, and Corben Ace. such as for cowls, turtle-decks etc., it to find out the name of the model. Walt Mooney also has a plan packet sometimes becomes a tedious task as In CO2 , Doug Mooney showed everyone for Peanut scales which includes many you dope the tissue down using brush how to fly by putting up some good fine flying models that have been fea­ and fingers. The better way to do it is flights with his Miles M. 18. Bill Stroman tured in model magazines in the past. to put the tissue down and tack it with was second, flying a Fokker D-VI, and The cost ol his plans are a flat $5.00. dope or thinned out white glue, only behind him was Bill Warner with an Walt’s address is 2912 Cabrillo Mesa on the outer most edges of the surface Eastbourne. In Antique, the 1911 Cess­ Dr., San Diego, CA 92123. to be covered. Then water shrink. When na won again . . . it has been officially Another plan that might interest the tissue dries you will find that it has retired. Doug Mooney placed second some of you is that of a shrunken down drawn tight over the curved sheet sur­ with his Demoiselle, and third to Bill version of the Miss America (about face, so that doping now becomes an Warner and his Valkyrie. There weren’t 30-inch span) ideal for the Brown CC>2 . easy la s k .0 enough jets to make it a contest. This one is available Irom Ralph Dods- The 5th Las Vegas Vultures Peanut worth, 437 Ave. U South, Saskatoon, Scale Contest is now history, but the Sask, Canada, for a mere 50 cents to memory will last forever, and I can cover the cost of mailing and handling. Workbench . .. Continued from page 4 only say that I will be looking forward Neat deal, eh? told to "take it to a hobby shop.” to the one next year. My family and I Those of you who have been looking (Don’t laugh . . . il happens every left for home the same day of the con­ for basswood in longer lengths than day!) Or . . . and here's the danger . . . test, so we were pretty happy but tired normally found in model railroad sup­ the customer storms out, muttering when we pulled in the driveway. There plies will not have to look any longer. words like "Those $&%*!@>! kits ol is no doubt that building and flying VK Model Aircraft Co., 12072 Main XYZ Co. don’t fly worth a damn any­ scale models with some o f the best Rd., Akron, New York 14001 is now w ay!” The word gets around that your people you'll find anywhere has to be carrying the following sizes in 36-inch kits/engines/transmilters, etc., arc Lem­ the best thing going! lengths: 1/32 x 1/8-6 cents ea., ons. Sales drop. Hobby shops I old. There are a whole list o f items that 1/32 x 3/16 - 7 cents ea., 1/32 x 1/4 Modelers quit in disgust. Far out? 2001 ? I want to cover this month as space - 8 cents ea. These are ideal lor your Think about it! Then go to your local provides. Bob Holman, P.O. Box 741, larger models, and including R/C. hobby shop and buy something. San Bernardino, California 92402, is Last but not least is the new kit put P.S. This writer neither owns, nor now carrying many ol the AEROMOD- out by Peck-Polymers, P.O. Box 2498, has any financial interest in any hobby ELLER'S Hying scale plans. He is plan­ La Mesa, CA 92041. This is the Druine ning to carry the entire line as well as Turbulent that was designed and drawn their excellent 3-views. Mailing to Eng­ especially for Bob Peck by Bill Hannan. land for these will no longer be necess­ It is a model of the version especially MANY FLYING SITE PROBLEMS ARE ary. prepared for the Duke o f Edinburgh. SOLVED BY AMA’S CLUB PROGRAM Hal Swanson, ol Modernistic Models, The model is very detailed and has the P.O. Box 6932, Burbank, CA 91505, has special markings of the Tiger Club and

44 The MODEL BUILDER shop. Just a lot o f thanks that they’re there!" MIXTURE Any comments dealers, distributors, manufacturers, discount houses?

NOTICIA THROTTLE A Nuestros Lectores en America Latina. Nosotros aqui el Model Builder pen· samos que nuestros amigos en Centro V Sur America han sido un poco olvida- dos por la prensa aeromodelista. Estamos seguros que mucho digno de noticia csta pasando en America Latina, y que seria de interes a nuestros lectores sobre todo el mundo. Favor de mandarnos noliciasy fotos de Usted, sus amigos, o su club. Qual- AILERON quier desarrollo nuevo, resultados de competencias, aun una foto de su ultima FLAPS creacion, sea radio control, vuelo libre, U-control, o OVN I es de interes. Correspondencia en Espanol es accep­ table, y debe ser dirigida dircctamente a nuestro Contribuidor para America Latina: Eloy Marcv, 2217 So. Doreen Way, Santa Ana, CA 92705. Si Listed esta de paso por Los Angeles, puede llamar a Eloy a O rb it. Electronics, 714-540-1404. NOTICE To our Latin American Readers. We at the Model Builder feel that our friends in Central and South Amer­ ica have been somewhat neglected by the model press. We feel sure that much is taking place in Latin America that is worthy ELEVATOR of notice, and that would he of interest to our world-wide readership. RUDDER Please send us your news and photos of yourself, your friends, and your club. A ny new developments, i onlest results, original designs, or even a pic­ ture of your latest creation, he it R!C, tree Night, U-control, or UFO, are of Everything’s under control interest. with the great new Heathkit 8-channel systems Spanish material is acceptable and Eight independent channels in a package no bigger than conventional full-house trans­ should go directly to our Contributor mitters. Choice of single or dual stick control in 27, 53 and 72 MHz operation — with tor Latin America: Eloy Mare/, 2217 adjacent frequencies at no extra cost. Both transmitters have 2-position switch for So. Doreen Way, Santa Ana, CA 92705 landing gear, finger adjust tabs for auxiliary channels; trainer link jacks and “ buddy buttons” ; external charging jacks for simultaneous charging of transmitter & receiver // you are in Los Angeles on a visit, batteries; 8 range controls for adjusting servo travel. System prices include trans­ you may call Eloy at Orbit Electronics, mitter, receiver, battery pack, choice of any 4 miniature or sub-miniature servos, all 71 -1-540-1404. batteries (airborne weight with sub-miniature servos is a mere 11.3 oz.). For complete 8 channel flexibility & control, the Heathkit GD-405 systems are the only way to fly. • · · Complete Dual Stick System...... only 249.95* Complete Single Stick System ...... only 269.95* R/C Report . . Continued from page 15 fATW just punch a hole in the side ol the Schlumberger —I HEATH COMPANY, Dept. 23B-2 plane and run it through. Others get it The FREE Benton Harbor, Michigan 49022 Heathkit out behind the wing and tie it anywhere Catalog has □ Please send FREE Heathkit Catalog. that is convenient. What you should over 350 Name. watch lor is to see that the antenna is fun to build kits. Address______tree and clear of the servos and battery Order pack and that you inspect it from time yours City______State______Zip______I today Prices & specifications subject to change without notice. I to time. Olten, people will lie the end •M ail order prices; F.O.B. factory. GX-270 j to the tail surfaces with a small rubber ------1

The MODEL BUILDER 4 5 The Great Age o f S a it... Lives Again in these Authentic Scale Kits t h e y r e e a s y t o b u il d We know it seems unbelievable, but it's true. New techniques in the heretofore difficult rigging installation and ratline making, are simplified so that almost anyone can produce a craftsman-like job. Density selected prime balsa wood is a real pleasure to work with, and the step-by-step plan is simple and complete.

THEY'RE COMPLETE* With machine carved hulls, that require only a little trimming and sanding. Kits include many finely detailed cast metal fittings (as required for each kit) such as: Cannon, Life Boats, Windlass, Anchors, Steering Wheel - Wheel House, Water Cask, Lights, Stern Castles, Figure head, etc. Brass Chain, Black and Tan rigging line, Printed Cloth Sails, Decals, Display Pedestals and much more . . .

• Dry Kit. paint and cement not included.

SCHOONER BLUE NOSE KIT G3 — Length 11'/«"

THEY'RE UNIQUE Because such amazing detail and authenticity is achieved in kits SPANISH that are relatively easy to build. Plans include full size, as well as GALLEON assembly drawings for each step of KIT G1 — Length 10" the way. Authentic color scheme shows on full color kit box lid.

THEY'RE HISTORIC Plying the Spanish Main, the Galleons carried the treasures of the New World back to Spain. Outfitted with cannon they were used I I C C C D ! both as merchant men and warships . . . The Blazing Guns of the Constitution helped to establish our Nation. Now CONSTITUTION enshrined in Boston Harbor, it is the oldest commissioned vessel KIT G2 — Length 11" in the U.S. Navy . . . Built by Angus L. Walters the Bluenose was one of the finest Schooners to take the water. It came to world-wide fame racing against the Gertrude L. Thebaud. Bluenose captured the hearts of U.S. and Canada to such an extent, that today it is on the back of every Canadian Dime. THEY'RE ONL Y

• CARVED WOOD HULLS • CLOTH SAILS AND THEY'RE AT YOUR DEALERS NOW • CAST METAL FITTINGS GET OVER AND SEE THEM ... BUY ALL THREE! Span 54" Area 415 sq. in. Length 36" for Engines .23 to 3 5 Scale: 1.61" Equals 12.0"

SPECIAL THANKS The beautiful Citabria is manufactured by one of the oldest and respected names in American Aviation, The Bellanca Corporation, who so graciously provided us with the plans, photos and details of the full size aircraft. With this illustrious lineage, it is not surpris­ ing that the Citabria is just about unbeatable as a fun plane. Primary trainer, or for Aerobatics.

CITABRIA IS FOR YOU If you’re a Sport Flier, if you have a feeling for Scale, if you love R/C*, then this is your ship. It’s a beautiful machine that builds easy — goes to­ gether fast — plenty of room for any VYING AND TAIL SURFACES THE FUSELAGE equipment — rugged for hard use— Complete wing is built on work bench Fuselage sides are die cut full length. flies great — and is just about the right without having to remove it — so it's Cabin sides and inner doublers are size. flat and warp-free. Parts are die cut plywood as are the firewall and land­ * Can be flown Control Line too— instructions and carved. Balsa sheet cover makes ing gear bulkheads. It's easily as­ on plan. for tough wing. Wing is installed like sembled with die cut balsa bulkheads, it ought to be — with dowel pins and nose block, formed music wire landing nylon screw in wood nut-block. No un­ gear, custom dural engine mounts, etc. ABOUT THE KIT ITSELF sightly rubber bands to deteriorate, Cowling and wheel pants are rugged This kit is a real joy . . . Balsa Wood is break or slip. Rudder and Stab are plastic. the finest grade, density-selected and die cut sheet for simplicity and no sanded to micrometer tolerance; as is warp. Included is all the linkage hard­ the imported Finland Birch Plywood. ware: pushrods, aileron and elevator Every part is numbered to insure fast horns, bellcranks, clevis, connectors, 3nd accurate assembly as shown on etc., plus giant authentic decals, plas­ AVAILABLE :he easy step-by-step plans. tic windows, etc., etc. IN CANADA

STIRLING MODUS · IELFIUD AVI. a n d W ISTER ST. · PHILA., PA. 19144 If no dooler available, direct ordert occepted— with 10% additional charge lar handling and shipping. (60c minimum in U.S.. S i-25 minimum outiid· U.S.) 0 Catalog of entire line of airplane control line model kits, R/C scale and Trainer kits, boot model kits, accessories; etc. 25c enclosed. 0 “Secrets of Model Airplone Building." Including design, construction, lOUSTfti covering, finishing, flying, adjusting, control systems, etc. 25c enclosed. 0 “Secrets of Control line and Carrier Flying." Including preflight, soloing, stunting. Carrier ruies ond regulations. Carrier flying hints and control terlinq line installation instructions. 25c enclosed. No checks. Only U.S. money orders or currency accepted. MODELS u

N a m e ______INC. PHIIA . PA 19144. USA A d d r a n ______C ity ______Stola ------Z i p ------band (this is OK), but they make no as R/C. provisions for strain relief at the point This concerns a fellow who used to JACK STAFFORD where it exits the fuselage, and the wire live here and lives now in California. MODELS often will break or become frayed. The His name is Beverly Gooch. Beverly is a antenna you get with your receiver is self taught electronics engineer. He’s a Super Minnow Wins the correct length, incidentally, please genius, too. Long before anyone thought 4th NATS in a Row! don’t try to shorten or lengthen it. I of it he devised a method o f putting 12111 Beatrice Culver City. CA 90230 have included some sketches of what I a television picture on tape. Regular like to do with an antenna installation tape like you use on your tape recorder and I cannot understand why some . . . the small stuff. Not so great you manufacturer of small goodies doesn’t say? Well, he made the equipment to think this out and make some antenna do this, too . . . all the machinery . . . all exit and tie-down gimmicks. by himself and at that time he was just I sent my sketches to Charlie Cham­ out of his teens! bers of Rocket City Products, but he Well, back to the story, we all love 50" Span Formula 1 always never likes my ideas . . . in fact, Beverly. He is quiet and easy to get Winner 69, 70, 71 & 72 NATS he says (right to my face, yet) that I’m along with, but very much an individ­ Super M innow ______$49.95 crazy. However he did like one idea and ualist. He had this big six foot span free made a little streamlined fairing along flight that he had converted to R/C. with a piece o f Velcro sticky stuff to Now Beverly, back then, was quite tie down the end of the antenna. I like skinny and about six feet tall. He the fairing OK but yechhh on the Velcro always wore one o f those Bombadier sticky stuff. (Charlie will probably or Pilot’s caps that had a very long bill. stomp on me for that, too). I suggest Nobody else at the field had one. a piece o f a control horn or bellcrank, Beverly would start his engine, check modified as shown and in the sketch, his equipment and o ff he went. With secured in the fin. You can slip a rubber hand-held single channel transmitter in band in and tie the end of the antenna his left hand and plane, engine scream­ to keep it from flapping around. Makes ing, in his right, over his head, he would a neat arrangement. Then you can take start to run into the wind. Everyone a piece of scrap as shown and make a stopped to watch. He would run, faster strain relief gimmick as shown. I ’d like and faster. . . when he reached the right to see somebody make an antenna exit speed the wind would get under the bill 72" Span 56-65 Engine gadget as I ’ve drawn it, I think it would of his cap. It would blow off. Then, Comanche—A ll Balsa Cowl—549.95 be handy and neaten up some planes Beverly would stop dead in his tracks that are perfect except for the antenna and with a mighty heave the plane installation. It should be made o f plas­ would be airborne! We all used to fall tic that glue will stick to so you could- over laughing. Beverly, we miss you, old fasten it to the side of the plane, or the buddy! Sometimes, when Beverly visits

S3" SPAN 35-60 ENGINE top or wherever you will. his family in Nashville, he drops by to A ircoupe $49.95 SCALE TRAINER Didn’t mean to get technical but see me. Last time he told me he was wanted to get those ideas across. Not flying R/C gliders. I wonder if he still much new across my desk from the launches them the same way. manufacturers. One interesting item is Until next time . . . φ that World Engines is developing what - . . . , . ‘ ««"SPAN N E W *L-*.„ . . looks like an "expendable” type foam Super Midget -if o b m u l a I - ^ $ 4 9 .9 5 airplane for engines in the .35 to .40 Yugoslavia . . . Continued from page 15 class. You can get it in the air with a The first round began punctually at minimum of fuss and it doesn’t even 9 o’clock. Giezendanner flew in his require wheels, just belly it in. You usual style. Only at the points of inter­ could put a skid on it, I guess. And, of section o f the Eights he flew slightly course, you hand launch it . . . that unclean and also the three quick rolls means give it a good toss. Plane is called were not his best. He scored 4290 the “ Half Diamond" and when I get points. Matt flew next to last in the more poop on it, I'll pass it on. first half. He did not have his usual Speaking o f hand launches, I have to dash and energy, probably because his tell you this story. Back fifteen years or engine did not run full speed. With Weekender Prefab Basic Trainer 549.95 more when R/C was really in it’s infan­ 4280 points, Matt scored 10 points less cy, we always had to hand-launch the than Giezendanner. There was great ex­ planes. We didn’t think of tricycle land­ citement after lunch, when Hanno Prett- ing gears and the planes were always tail ner opened the second half o f the first draggers. Planes were mostly high wing round. He flew very well and placed his

38 Span I5 Engines cabin types and pretty stable. Control figures exactly in the flying sector. For Mustang QM Quarter Midget 534.95 was mostly single channel and you had his faultless flight he scored 4560 points. Send stamp for new catalog. rudder control only. Many free flight Thus Prettner was leading Giezendanner type big planes were modified and flown and Matt. Fourth was Gunter Hoppe,

48 The MODEL BUILDER beautiful

< 2 i t t u á

SPAN: 875/16" .LENGTH: 37%" WEIGHT: 12 oz. SCALE: 1.5" Equals 12.0

over seven feet o f sheer grace and beauty...

STRUCTURE Frame Photo reveals the excel­ lence of the design engineering of the kit. Although structure is relatively simple, it is one of fine detail and great strength.

A F IN E K IT GREAT FLIGHT PERFORMANCE Top quality Balsa used throughout. All parts A real soaring machine is this model Cirrus. accurately die cut and numbered to insure fast Eiffel 400 soaring wing section seeks out and accurate assembly, as shown on the detailed takes full advantage of every thermal current. plan. Also included are shaped trailing edges, Can be flown Tow Line - Free Flight, Single finished nose cone, giant clear canopy, authen­ Channel or pulse R/C for Slope and Thermal tic decals, full size plans with step-by-step Soaring. Large Cockpit area provides ample drawings and instructions, etc. room for R/C Equipment.

STIRLING MODUS · RKIPIELD AVI. a n d W IST» ST · PHILA., PA. 19144 If no dealer ovoiloblo, direct orders occoptod— with 1 0 % additional chorg· for handling and «hipping. (60c minimum in U.S.. S i . 25 minimum outside US.) 0 Catalog of ontir# lino of airplono control lino model kit«. R / C «cole an d Troiner kit«, boat model kit«, occeitoriei, etc. 25c encloted. □ "Secret« of Model Airplane Ruilding." Including deiign, conduction. covering, finithing, flying, adjusting, control «yitemt. etc. 25c enclosed. 0 "Secrets of Control line ond Carrier Plying." Including preflight, soloing, stunting. Carrier ruiet ond regulations. Carrier flying hints and control line installation instructions. 25c enclosed. No checks. Only U.S. money orders or currency accepted.

N o m e ______- AVAILABLE IN CANADA A d d re ss ______C ity ______S to le ------Z i p ------The Pattern Engine to Watch.. pilot, one could see that Prettner was leading with 5 (!) points more than Giezendanner. Matt was well behind them by 265 points. Everything depend­ ed now on the decisive 3rd round and one could be anxiously awaiting the the result of this fight of nerves. Then it VECO started! Hanno Prettner had to fly first in the 3rd round. It was a pleasure to .61R/C watch the flight. It seemed that Hanno had forgotten about his nerves. His roll “Series 12” figures were masterly, especially the Slow Roll, where Prcttner’s “ Super- with MUFFLER* Sicroly” seemed to turn in slow motion •Sold only with muffler on a string around its long axis. The same held for the Four Point Roll, with exact, sustained knife-edge flight Take a good look - you'll be and fluent quarter-rolls in between. Appropriate to the flight was the valua­ seeing a lot of this engine! tion of the 5 referees: 4710 points. All indicators point to the New VECO .61R/C World champion Giezendanner would as the pattern engine to watch in 73! It is need 4720 points to win. The weather proving its worth by challenging the imports did not change on Sunday and so all for the top places. Thus, more and more pat­ participants had the same conditions. tern flyers are switching to the New VECO Giezendanner was the first to fly after lunch. The ground was deathly silent .61 R/C when they see and hear its amazing and this time his slow roll was very performance. A case in point, one of those good. The landing was exact and the who made the switch, is Bill Salkowski. It great numbers of spectators were anxious­ paid off. He took first in Class C Expert at the ly awaiting the result. Giezendanner got Winter Nationals in Tucson, November 24th, 4615 points. This was not enough and 25th, and 26th. Hanno Prettner was leading with an ad­ Muffled against noise and engineered for vantage o f 100 points. Malt, third of performance, the New VECO .61 R/C includes the leading three, but without any chance to win, got 4715 points for his a specially designed F-L-O-W T-H-R-U muf­ best flight. The final results were as fler that does not inhibit its performance. It follows: is rugged in construction, contemporary in Hanno Prettner won the Bled Cup design and fitted with a pressure tap. (9270). World champion Giezendanner The engine features new improved head, was second (9170) in front of Matt piston, by-pass, port timing, rod, ring, and (9010). Fourth was Gunter Hoppe cylinder, plus a beefed up housing. (8325). The next three were Schniffner Ernst (8205), Kurt Matke (8170), and Another big bonus for flying with the New Duponchel from Belgium (8130). Ninth VECO .61 R/C is its quick availability of parts. was Budy Harald (8075) before Maren- bach Gunter (7995). About the style of flying, it can be

DIVISION OF AURORA PRODUCTS CORP said that the trend to a faster and more 12152 WOODRUFF AVE DOWNEY. CALIFORNIA 90241 Fluent flying style is still persisting and extremely slow flying is hardly in use the most steady German pilot, but he clean, though he dropped o ff at the any more. The winner of this meeting, is not a member of the team lor the end of the Four Point Roll, and because Hanno Prettner, once again flew his world championship. Neckar Harald, of the wind he landed in the larger long tried “ Super Sicroly” with Simprop Wolfgang Schwarze, and Rudoll Godel circle. Giezendanner was last in the Alpha 7, which he had already used in occupied the next places. The German second round. He Hew after sunset, but Gorizia in the first “ competition of champion, Kurt Matke, was only eighth. with the sun, the wind had gone too. giants” of this year. Bruno Giezendanner Prettner caused the first excitement Under these conditions Bruno was Hy­ also stayed with his "Marabu” and Digi- o f the 2nd round. Starting last before ing very steady and balanced, result: Fly. Wolfgang Matt piloted his “ Super lunch, he had to fly with a gusty side highest score ol this heat. After two Star" with a Simprop Alpha 7. It is no wind but this did not disturb Hanno rounds, Hanno was leading with 9025 longer remarkable that the first 8 models and he flew in his exact and fluent style. points in front ol Giezendanner (8845), were equipped with retractible landing- He lost a few points on his landing when and Wolfgang Matt (8575), Neckar gears. a gust pushed his wing sidewards. In the (8280) came in front of Hoppe (8130), The winners ceremony took place early afternoon, Matt started with his and Matke improved and was 6th with during a public banquet at the hotel program. The wind was still blowing 7985 points. Graiski Dvor, where wine, music, and with unreduced force. Wolfgang flew Considering the best round lor each dancing helped to form many new

50 The MODEL BUILDER friendships. Once again we want lo say that the organizers ol the Bled Cup took great pains to carry out the tradi­ tional competition to everyone’s satis­ SUPER KAOS! faction. (In a separate nole, Frit/ informed us that Hanno Prettner was unfortunate in having a fire in his workshop just as the 1972 season was to begin. A s a re­ sult, his two Doylestown planes, and Cali). Residents Add 5% Tax. two new ships under construction, were destroyed. He campagned throughout the season with one airplane (a Super- Sicroly), but has two more that will be ready for the W/C in Gori/ia, Italy, this coming September. Ed.)

F/FAI...... Continued from page 37 tried. Also, various head depths gave • 64 4 Sq. In. Wing Area • Agile and responsive at high or low increases as much as 500 to 1000 • 58-1/2"'Wing Span speeds, without harmful snap tenden- R.P.M.’s, but this would not be credited • 7-1/4 Lbs. with retract gear • Fly with or without retracts. A m p l e to a standard engine. • 6-1/4 Lbs. with fixed gear room foe all manufactured types. This is a good time to say that model­ • For .61 engine Engine Displacement • Easy, indexed construction throughout, • Years of developement brings you a for true assembly. ers who have the facilities for reworking, highly competitive model. • Machine cut balsa and hardwood parts and the knowledge to do so, will find • Capable of all types of maneuvers, in­ from top quality materials. plenty of room in this particular engine cluding A M A and FAI patterns. • All special hardware included. for modifying. Next month we will report on what we have tried in the way of reworking thus far, and will make some recommen­ BRIDI HOBBY [MERPRISES dations on this subject. 1611 E. Sandison St. Wilmington, Calif. 90744

Hannan...... Continued from page 30 and Chuck West on hand. tures hundreds ol outstanding photo­ Fairchild KR-21, Flughes Racer, Waco The contest itself was an indoor af­ graphs of aerobatic aircralt flown during Taper Wing, Bonanza, Mustang, "G oon” fair, and included classes for regulation almost the entire history of aviation, Racer, Corben “ Super Ace” and many Peanuts, Profile scale and C02. Several from the early 1900’s through the pres­ more. A complete list of these and other Micro-Jet Models participated in the ent. Ol special interest are the crisp plans is available by sending a stamped latter category, highlighted by the strict- 3-view drawings of subjects which al­ self-addressed envelope to: MODERN­ ly-sclae non-landing of Bill Stroman’s most cry out to be converted to models. ISTIC MODELS, P.O. Box 6932, Bur­ Japanese Kamikaze Baka Bomb. Sump- You biplane fans (are you listening bank, CA 91505. tious food for the always-hundry troops WCN?) will really find enticement w ith ­ LAS VEGAS SHELL GAME was provided by Doris Haight, Dixie in the pages ol this volume! Priced at We just returned from a "gamboling” West, Ginger Warner and other volun­ $4.95, "Acrobats” may be ordered by expedition to Nevada . . . with a differ­ teers. The Ms. set was also ably repre­ mail from: Heritage Press, Box 167, ence: The stakes were plaques and mer­ sented in the contest action by Carole Glendale, CA 91209. chandise prizes, and the "dice" were Mooney, Chrislea Bee Mooney, and the NOSTALIGA REVISITED Peanut Scale models! The occasion was feminine heir to the Warner fortune. Jonas "B ud" Jossclson, ol Hunting- the 5th Annual Vegas Vultures contest, In addition to the unique willow ton Beach, California, has gone most of held each New Years. Fernando Ramos wood plaques crafted in the shape o f the other old-timer enthusiasts one bet­ will have more details in his column, the state ol Nevada, merchandise prizes ter. Seems that he plays old radio pro­ but here are a few observations from were provided by The Model Builder, grams recording during building ses­ the old ackemma. The entire pervading The Williams Brothers, John Pond, Russ- sions, to heighten the effect of the atmosphere was one o f low-pressure. Cralt, Modernistic Models, Hannan fondly-recalled days of his youth. Per­ Humor reigns supreme and the losers Graphics, Marlow Engineering, Walt haps, after all, there IS a time machine! have almost as much fun as the winners. Mooney, Bill Stroman, and John W. • · · Host Bob Haight announced "A ll bowl Caler Publications. Every entrant re­ games are pre-empted by the Peanut ceived some tangible reminder of parti­ Plug Sparks . .. Continued from page 41 Scale event." He might have included cipation. Which all goes to show it is the necessary components to completely sleeping among the pre-empted also, still possible to have fun with low-cost set up an ignition system, Polks Hobby since a steady procession of movies, aircraft. in New York has all the parts you need, slides, and plain old bull sessions were ACROBATS IN THE SKY is the as does B ill’s Mail Order Hobby, 503 virtually non-stop. The conversation was title of a brand-new book by lighiplane West Astor, Lee’s Summit, Missouri top-notch, with such raconteurs as Walt authority John Underwood. A “ natural” 64063. Send Bill $5.00 (and your name Mooney, Bill Warner, Tom Atkinson for model builders, this publication fea­ and address, of course) and he will send

The MODEL BUILDER 51 didn’t want to get involved anymore? If you would care to write Dick for more details as to what he plans to SANTA BARBARA manufacture, the address is Dick Dwyer, ONE DESIGN. More than five hundred sold — and «10 can still beat «500! 1837 Flood Dr., San Jose, CA 95124. Length 70 in., mast 72 in., sail area 1100 Dick also passed on some informa­ sq. in., displacement 28 Ib. Prefinished fiberglass hull, deck, cabin and tion to us that may be of interest to k e e l...... $165.00 engine collectors. We’ve always wond­ ered what the difference was between a replica and a reproduction engine. Well, Λ SOLING-M. Scaled here is Dick’s explanation. A reproduc­ from the exciting new Olympic-class tion is an exact copy of any given item, three-man keel boat. Length 50 in., mast 60 in., sail area 800 sq. in., displacement whether it be an engine or an oil 18 lb. For American Model Yachting painting. A replica is, in essence, a re­ Association 50/800 "M " class racing. Prefinished fiberglass hull and deck, production with the difference being machined cast-iron keel . . . $125.00 that the replica parts only have to look like the original and have the same use­ BOTH KITS include finished Dacron ful function. Kind of like stand-off sails, spruce spar blanks, stainless rigging, brass fittings, and die-cast aluminum scale wouldn’t you say? (Bet we’ll get rudder. For two- or three-channel r/c some letters on that. WCN) operation with the Vortex sail control unit. Another new item that has just ap­ peared on the market is a dry cell SEE YOUR battery called Lithicell. According to HOBBY DEALER! the article we read, this battery could possibly replace all other batteries that are presently being used by modelers. We don’t claim to be an expert on this type of item, but even with our limited knowledge we can see where this battery could possibly be the most revolution­ ?10E«st Ortega Street SAIL CONTROL UNIT with gel/cell Santa Ramara. CA 93101 ary one to come along in the past battery and charger...... S75.00 Te'ephone <80f>> 963 1636 decade. Here are the advertised specifi­ cations so you may judge for yourself. you a monthly news bulletin with a list­ a rily for the collector rather than the These batteries may be stored in ex­ ing of over 1,000 engines and acces­ flyer, Dick goes on to say, it would have cess o f ten years with a capacity loss o f sories. We had a chance to talk to Bill more than enough power for any class just 20%. A t down to -40 degrees F, on the phone a short time ago, and he A Old Timer model. For more informa­ cells will produce up to 60% o f capacity. informed us that his supply and turn­ tion on this engine and several others Cells produce twice the voltage of other over of engines has been so great that he that are in the works, write to the dry cell systems; and energy density ex­ has even had to publish a bi-monthly above address for their ad and bro­ ceeds others by as much as 400%. listing on several occasions. Bill also chures. I have been promised one of Weight is 20% less than mercury bat­ said that he is manufacturing the famous these engines for testing, and as soon teries, yet watt/hour capacity is triple. Y&O propellers, and for only 95 cents. as possible will pass on my findings to With these specs and a decent price, For the uninformed, this was, and in you. the Lithicell may be the modeling bat­ our own opinion, still is, one of the Dick Dwyer himself has some items tery o f the future. We’ll have a full re­ most efficient ignition engine props ever on the market that might be of interest. port on these batteries as soon as we’ve designed. He has formed his own company, had a chance to evaluate them. As long as we’re on the subject of RAMPCO, which stands for Replica Now would be as good a time as any engines, I received a copy o f a brochure Antique Motor Parts Co. Some ol the to look back on 1972, and ahead for put out by REPLICA ENGINES, 14600 goodies now on the shelf are, Arden 1973. Out here in beautiful, smog- Ramstad Dr., San jose, CA 95127. The 099 and 199 timer housings with moving free (?) southern California, 1972 was ad was for a replica of jack Keener’s point post installed (less points), $4.50 a bumper year for old time free flight­ HEX HEAD BRAT, designed in 1937. P.P. This unit can also be bought as an ing. There were a total o f thirteen con­ According to the information received unfinished casting, with machine draw­ tests in which old timers could partici­ with the ad, the engine is o f approxi­ ings and instructions for $2.95 P.P. Dick pate, or better than one a month. We mately .140 displacement and sells for says that these parts are currently made are blessed out here with having three $49.95, including a copy of the original of aluminum, but he hopes to be able good contest sites for holding our var­ Brat brochure. Dick Dwyer, who also to offer magnesium at a later date. ious meets. The closest one is Sepul­ lives in San Jose, sent some additional Other Replica items on the drawing veda Basin, which is almost in the heart information on the engine. board are, Baby Cyclone crankcases of the San Fernando Valley, north of According to Dick, though the en­ and timer castings, Bunch timer cast­ Los Angeles. The second is Lake Elsi­ gine looks the same as the original Brat ings, Rogcrs/Syncro B-30 type timer nore, an almost desert-like area located on the outside, the insides have been castings, and Thunderbird tank and approximately 60 miles south east of brought up to date as far as modern timer castings. Whew, this man might L.A., in Riverside County. Our third techniques go. Thus, even though the just try and take on Mount Everest for site is three miles east of Taft, Califor­ new engine is being manuf actured prim­ a coffee break! And who said people nia and even though we have placed it

52 The MODEL BUILDER Looking forward to summer fun? % well look into a free flight helicopter What you'll see is a little model that thrives on clean air, open spaces, and the exhileration of flying free. Designed as a semi-scale of the Enstrom F-28A

Specif icanons Features: Mam rotor dia. 32" Belt driven rotor shaft. Engine 049 to .051 Fully formed, joined and painted FiberGlass fuselage Weight 20 o/. Machined. Molded and Pre formed parts. F use I age length 24” Detailed plans and instructions.

and powered by an .049 engine, the model is capable of flying to a height of 500 ft. and autorotating slowly back to earth when the tank is dry. It's a lot of fun for a low price: yours for under $40.00 BROZ ENTERPRISES, INC. Send for fully illustrated descriptive literature. 104 Lake Scranton Rd„ Scranton, Pa. 18505 Catalog and Model Helicopter News magazine $1.00. number three, it has to be the number Back in the thirties when all of this to seeing them added to the competi­ one free flight area in the U.S.A. . . . started, the general atmosphere was one tion schedule. Should you be on your There have been several contest re­ of relaxation and low pressure. Over the way to "fun city,” drop me a postcard ported in MB which were held at Taft, last decade, I have seen modern-day free for additional details. Notable individ­ but until you have the opportunity to flight become an almost dog-eat-dog ual looking for potential fleet members come and see the area you’ll just have kind of compction. Go to any jointly is Jim Foote of Flopkins, Minnesota. to take our word for it, Taft is truly held modern-day and old timer free Jim has an interest in 10-Rater or the free flighters Mecca. flight contest, and the difference in tem­ Santa Barbara activity, but I ’m sure he Possibly, 1973 could be the year po becomes readily evident. At most of would sail just about anything to see that old time free flighting gels its best the old timer contests in which we some active racing start in the Land kick in the pants. Looking over the competed this year, we were amazed o’Lakes. coming contest schedule for the South­ at the number of wives that were pres­ Are you a lone wolf looking for ern California area, we count 16 meets ent. Even old-timer club meetings, such somebody to match race? The best way with old timer events added. O f course, as those of the SCAMPS, have become to identify nearby skippers is to join the big one will be held in )une, and more o f a family affair, and one fellow AMYA and ask the Secretary to pro­ that is the S.A.M. Old Time Champion­ club member, who shall remain anony­ vide you with your neighbor's names ships. We’ll give you a complete schedule mous, even brings his dog "Sam” to the when he sends your Constitution and of events, plus rules, in next m onth’s contests . . . Maybe those were the registration packet. The Central Illinois column. Also, if you have any big con­ "good old days” after all.# Flotilla has members who live no closer tests coming up in your part of the than 50 miles to one another, yet they country, send us a dope sheet and we’ll were able to pull together, obtain pass it on to MB readers. Incidentally, Counter...... Continued from page 7 AM YA sanctioned club status, and hold if you have any information or news cranks, and over-ride R/C throttle push- one of the most enjoyable regattas I ’ve pertaining to old time free tlighting, rod (Full to idle without moving servo ever attended. You can do it too. Don’t send it to us. Also, send us any old arm), auto-balance spinner (!), a 3 sit and wring your hands, winter is a pictures that you feel would be of ounce vinyl luel bulb, miniature rod wonderful time for the administrative interest to others. II and after using ends (Great for swash plate control on baloney it takes to start a club. Do it them, we can return them in perfect helicopters, also the ultimate in bell- now and don’t waste sunny, breezy condition. crank and pushrod fittings. You gotta days next summer. We suppose the phrase “ Old Timer” see these to appreciate the possibilities Questions on any phase of R/C conjures up images o f old men, bent in many areas o f use.), and .040 buterate MODEL SAIL YACHTING? Drop me a and wrinkled, and barely able to stand canopies in many sizes (including re­ line, Rod Carr, 2713 Blain Drive, Chevy on their own two legs. . . Dillerent per­ placements for Cirrus, Nimbus, ASW-15, Chase, Md. 2 0 0 1 5 .# sons, different meanings . . . With Duster, and Sigma type sailplanes).® modern day man so indoctrinated into a last moving society, it is really hard to Peanut T-A ir.. Continued from page 31 believe that there is still a sport that Strictly Sail .. Continued from page 42 Colored Japanese tissue, plus a few has all the speed, thrills, and excite­ from their Secretary. Though initially a thinned coats of clear dope are used for ment of ,i championship turtle race. vane club, they will be going into R/C covering the model. A small amount of But there is . . . It ’s an old time free 50/800 activity next year, with interest nose weight was required for a flat flight contest . . . There is only one also being expressed in the AMERICAN glide. So far, the flights have been rela­ word that can truly describe such a X class. We’ve urged them to affiliate tively short, but it certainly looks good meet . . . Relaxed. with AMYA and are looking forward up there in the sky - - - complete with

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"Les Pilotes” o’coursc! Oh yes, Le limited area. to success. Pilote in the front cockpit sits very low A second school advocates thermal When a sailplane Hies near a mass of because he is really a passenger . . . the stalking at the best L/D speed. This is rising air, the vertical movement of that real Travelair had controls only in the about 20 to 30 per cent faster than Vms air will cause the wing closest to it to rear co ckp it.® . . . is the sailplane's most efficient trim rock upward. If the rising air is to the . . . and provides the greatest distance right of the sailplane, the right wing will over the ground for the amount of alti­ be pushed up. When this happens, that R/C Soaring .. Continued from page 40 tude lost. This best L/D speed lets the stupid sailplane . . . left to its own de­ low was observed at the LSF 1971 RC pilot extend his search over a wider area vices . . . thinks it ’s in a bank and turns Soaring Tournament at Livermore, CA. . . . further from the point of release .. . to the left. Away from the thermal. It L ilt encountered at the normal release and thereby explore more potential will take and remain on this new head­ point was o f such strength that when thermal sources. ing until a similar situation gives it an­ winch power was slopped, the tow lines There arc good arguments for both other shove. actually unreeled from the upward pull cases . . . and times when each should Obviously, it’s important to fly the of the sailplanes. Flight after flight. be used. The judgment is the pilo t’s. machine rather than just watch it free- These conditions were so extreme that So take your pick. Enroll in the school flighi while you lovingly cradle that they made it all but impossible to re­ of your choice. Or better yet, try and multi-buck electronic box. Slop loving lease from the line . . . and required a use both at various times. and start flying. I t ’s work, but concen­ diving maneuver to over-fly the low Under either philosophy of hunting trate on holding a given heading. Don’t ring. Sailplanes were almost out of sight, speed, upon release Irom the tow line, let the sailplane fly you . . . so to speak. straight up, in about 3 minutes. A prac­ fly either a straight path directly into Then, when lift pushes a wing up, or the tical demonstration o f "Whoopee.” the wind, or turn 90 degrees and track sailplane seems to be fighting the course So, work the tow to gel good height. crosswind. Do not turn 180 degrees and you’re trying to hold, slam the rudder Then the hunt begins. We're looking for head downwind, unless to a known lift stick over and turn immediately toward help and the only indicator that it has area. The idea here is to stay upwind as the high wing . . . or in the direction arrived is the reaction of the sailplane. much as possible, drifting downwind opposite the way the sailplane seems To the experienced pilot, it’s all that’s only when climbing in lift. In this way, to want to go. needed. there should always be altitude to trade Now most thermals won’t be so ob­ The appropriate Hying speed for for the speed/penetration necessary to vious as to roll the sailplane up to any thermal hunting is . . . as with most drive back into the wind to reach the 45 degrees. They’re usually much more things related to R/C soaring . . . a landing area. subtle . . . and sort of a rocking motion matter of conjecture, personal theories, A cardinal rule: when thermal hunt­ is more likely. Maybe 5 or 10 degrees and existing conditions. One school of ing, do not let the sailplane take its . . . or less. This w ill vary, o f course, in "thought" recommends maximum u tili­ own heading. As opposed to a free- several ways: with the strength and size sation of available time and altitude by llight model which is trimmed to cir­ of the thermal, how close the sailplane flying the sailplane at that speed which cle, an R/C sailplane is trimmed for is to the thermal's center, and the lateral provides minimum sink, Vms. This speed straight flight. If left to “ d rift" on its stability characteristics of the design, is just a hair short o f “ mushing” which, own course, an R/C sailplane will often just be in control of the sailplane . . . in turn, is just a smidgen above stall work its way through areas ot lift . . . and be watching . . . so you’ll know speed. It's not the best L/D . . . effi­ like dodging mine fields . . . and soon what to do when you get a bump. ciency . . . speed, and is no good to be safely back on the ground. The pilot Otherwise, you may turn the wrong cover distance. Vms gives the slowest must be in control and direct the course way . . . away from the lift . . . and return to the ground, and the longest of flight. Strange as it may seem, this have the opportunity to practice your flight time for the hunt . . . within a appears to be a great part o f the secret landing approach one more time. Quick.

54 The MODEL BUILDER Or is that “ quickly?” (How about "al­ most immediately? " WCN) Now if what was observed as an indi­ cation o f lift was for real, turning toward the high wing should drive the sailplane into the lift area. After turn­ ing into the lift, a circular flight path should be initiated. Whether the circle should be started into the wind or with the wind, left or right, is anybody’s guess. Chances are into the wind is best. If for no other reason, in order to maintain an upwind flight /one. In really strong lift, the sailplane may be difficult to turn in the desired direction. The reason is simple enough. Ihe upsetting force . . . that is, the lift . . . is trying to push the sailplane away. This force is opposing the desired turn, and can easily be stronger than the turning power of the model . . . so the model doesn’t respond to the pilo t’s control input. Or at least doesn’t re­ spond promptly. In a case such as this, don’t fight it by continuing the “ front­ al” attack. Rather, turn with the oppos­ ing force . . . that is, away from the lift . . . through 270 degrees, and then fly straight in to the lift area. After all, it stands to reason that any sailplane can penetrate with more power flying "straight on” than when in a turn. Once you’re in the lift, start the circling bit, as described earlier. almost directly overhead . . . it is all important thing is to correct the immed­ Now if what was observed as an in­ but impossible to judge and fly a per­ iate situation. How you spend your Sat­ dication o f lift was for real, turning fect circle. But, the bank angle can be urday nights is your business. toward the high wing should drive the seen easily, and a constant bank results The quickest way to get back in the sailplane into the lift area. After turn­ in a perfect circle . . . through the air, lift you just lost is to use the “ 270 ing into the lift, a circular flight path not necessarily over the ground. degree correction.” It may even work. should be initiated. Whether the circle An example of this is flying a “ stan­ The principle is to continue circling in should be started into the wind or with dard” turn in a man-carrying powered what you have realized is the wrong the wind is anybody’s guess, but chan­ plane by holding a constant rate o f bank direction for three-quarters . . . 27 de­ ces are into the wind is the best bet. If and speed . . . and feeling the bumps grees . . . of a lull circle. At the 270 for no other reason, in order to main­ from your own prop wash as the plane degree point, roll out and fly straight tain an upwind flight area. tracks in its own path. It works. for a couple of seconds or so, then start Assuming that the lift is there, the I t ’s quite probable that the first cir­ circling again. You should be back in original circular flight path probably cles in the elusive lift will be so far . .. the lift area anyhow, even if not cen­ will not be “centered.” That is, lift or so displaced . . . from the center that tered up. will likely be stronger in one part of the rising air w ill try to push the sail­ Once centered in lift . . . whether by the circle than in others. If for no other plane away. Just as before. The wing blind luck or supreme skill . . . don’t reason, because the thermal probably nearest the strong stuff goes up . . . in­ fight the sailplane to stay in the same won’t be round anyhow. But the idea is creasing rate of bank . . . and moving place in the sky. Remember, a ther­ to move the flight path . . . and to keep the path of flight away from the desired mal is sorta like a big, invisible bubble it simple, let’s keep it a circular flight course. When this happens, the pilot that drifts with the wind. If you’re going path, at least for now . . . so that the should plan to elongate the circle the to stay with it, you too must d rift. So, sailplane is always in the strongest lift next time around in order to drive fur­ hold a nice, steady bank and chances area of the thermal. This is called ther into the lift area. Then, set up a are you’ll hang right in there. Forget “ centering.” constant rate of bank again. about the sailplane’s track over the Here’s where precision piloting pays During this “ centering” activity . . . ground. It ’s got nothing to do with off. The smoother, more accurate and or in the original hunt, as far as that nothing. Think “ up.” consistent the circular flight path, the goes . . . the sailplane might be turned Oh, it’s quite a battle. Plan now on easier it is to identify thermal-caused in a direction away from the strong lift. losing . . . often. But when you do win flight variances. Try and set a fixed Such a mistake can be identified by . . . if even for a little bit . . . it makes angle o f bank and a fixed pitch trim. either subtle or intense increase in rate it all worthwhile. When watching a sailplane at a slant of sink. Depends on whether you're If the sailplane is able to hold alti­ angle . . . anytime the sailplane is not livin’ right or not. But, no matter. The tude, you’re ahead of the game. You’re

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not sinking, and that means you’re suspected to be lift generators . . . like cloud lift may be beyond the reach of gaining flight time if not altitude. Also, parking lots, or open fields, or roof tops, most R/C sailplane activity. But if you you may be in an area that’s “ building,” or wherever you may have gotten bumps can reach it . . . why not? The source and may soon provide good, solid “ up” before. Chances are that there will be a will be upwind ... . due to wind slant. air. little wind slant, so allow for it rather A couple o f things to keep in mind As long as you are able to at least than flying directly above the suspected when monkeying around with clouds. sustain, might as well explore a little thermal source. Il can be a rough ride as the turbulence and see if you can improve the situa­ If you wanta be a winner, never may get rather violent . . . for a model. tion. The obvious thing to do is to slop working. The guys who usually take Also, stay clear of the cloud proper. . . change the angle ol bank . . . and there­ home the hardware will work any kind lar enough below the base so that you fore the size of circle. Keep a close eye of a bump that isn’t followed by a don’t gel sucked in. That’s a real good for an indication of stronger lift as well grind. I t ’s absolutely ridiculous what way to lose a sailplane . .. either broken as sink. If better “ up" air is indicated, some guys will d o .. . it’s also absolutely up by rough air . . . or a fly away be­ try working to center in it for best amazing. And disheartening . . . il you cause you can’t see il anymore, ‘cause climb. Should you start losing altitude, can’t do it. it’s inside the cloud. hurry back to where you were before Many a long, high flight has started II you gel up in the cloud region, . . . if you can find it. Some of the Hot . . . or restarted . . . from lower than keep an alert eye and ear for full-scale Shots build sort of a mental picture of light pole level. Some smart alecks have cratt. If one should appear, take immed­ the area they’re working. Helps 'em stay been seen working tender little bubbles iate, evasive action. That is, turn in in lift . . . and also to better visualize no more than 10 or 15 feet o ff the whatever direction required to get hori­ where stronger conditions might be. ground. I t ’s disgraceful . . . if not im­ zontal separation. Don’t try to judge Sounds like a good idea, il you can do moral. But perhaps the final insult is vertical separation unless it is truely it. Takes practice . . . and concentra­ the guy with such audacity . . . okey, obvious that there is no potential haz­ tion. so it ’s talent . . . that he hand-launches ard. When you hit sink during your ther­ his sailplane, seriously looking for lift. The hunt and capture routine dis­ mal hunts, get out of the area. Fast. O il times these clowns can squeeze out cussed earlier is still valid if you're fly­ There’s nothing to gain by hanging two or three circles before landing. And ing a cumulus sky. Fly straight and around. Get the nose down to speed sometimes more . . . much more. Like watch for a wing to point at the lilt. up and cover ground. How come you’re several minutes. Or like Old Flying Now some wise guy is about to losing all of a sudden? Any one or a Buddy (OFB) Bill Watson a coupla comment, “ Sure, but what if you hit combination of reasons. Like ya lost weeks ago . . . 27 minutes! From a hand rising air with both wings at the same the thermal . . . or you reached the top launch. Can you imagine? But I don’t time. Like straight on, Man.” o f the thermal . . . or the thermal care, I’m still not going to sell my In such a case, the wings may not reached its top . . . or the thermal died sailplanes. wiggle. Probably won’t. But, as noted its natural death, or weakened to the Clouds can indicate lilt areas. The several paragraphs back, we’re looking point of uselessness . . . or ya slipped pretty, puffy little white ones called for cither “ displacements or speed outside of the "u p ” air in to the “ Cumulus” are much like corks on top changes.” The displacements are the "down” stuff. The main thing is that ol a column of lilt. If the clouds are wing-up bounces. Should you hit lift where you happen to be is no good . . . building, it’s because air . . . moist air dead on the nose, the sailplane slows so get out of there, and look for some­ . . . is (lowing upward to them. Might down. Why? Because when entering thing belter. as well get on the elevator if you can. rising air, the sailplane gets a vertical Start flying the "straight and narrow” In many areas of the country . . . push up which increases the angle ol again. Head upwind or toward areas particularly the West and Southwest .. . attack and thus slows forward speed. I

56 The MODEL BUILDER Features HUNGERFORD SPOKE WHEELS Glass Spar Wing All Balsa Construction Fred Reese’s A "must" for vintage model aircraft Formed Canopy Fiberglass Cowl Available in many sizes for small indoor Detailed Instructions x ^ w * - ,-e S h & e A t A M Q types, control-line and small R/C. Send Plans. Three Views \Λ °° Decals ° ° - stamped envelope for complete list. ° ' To,ai Wei9h> Area9 302 or 310 in so 2-1/2 lbs Span 35 or 37 in • Dealers inquiries invited · Fuselage Thickness 10% — 1 in Root FH WHEELS 1700 Lilac Circle Height 5-1/8 in Engine Titusville, Florida 32780 Width 3 in 0 15 R/C Price $32.95 guess. See your local dealer first Or maybe it’s just a matter of pene­ Distributor and dealer inquiries invited California trating this vertical air, and the sailplane residents add 5% tax Sorry, effectively hits resistance to its forward no C O D 2814 East 56th Way. Long Beach. CA 90805 progress. Or both. No matter. It ’ll slow down. Maybe just a little . . . maybe so 29:45, it hurts. Harley Michaelis, up in “ Under Thirty Club” . . . and that’s got little you’ll not notice. Many times, Walla Walla, Washington, left a thermal nothing to do with age. One of the though, it will appear to have hit a at near out-of-sight altitude when the quickest routes to acceptance is to be a brick wall. Even go into a big, hairy clock read 27:00. He was on the ground thermal-hopper. So work your thermal- stall . . . as if ya got glitched. If this at 29:50. A real c liff hanger. in-hand for everything you can get out happens, get the nose down hard and OFB Bob Boucher . . . father of the of it. No reason to join the club if you fast to increase flying speed so as to have “ Monterey” . . . must have had a dozen don’t have to. It isn’t very exclusive. the power to literally force your way flights over 28 minutes before the elu­ Okey, let’s wrap it up for this time into the lift. Some thermals are strong sive 30 came his way. Now Bob didn’t . . . and go flying. enough to “ spit” a sailplane right back bail out early on all those trys . . . but Remember, get all the altitude you out . . . but it’s worth the fight. Once his luck left something to be desired. On can on the launch. Don’t let your sail­ you break into it, start circling routine the flight that finished up his LSF Level plane wander around in the sky. When to center up. And smile. Cause this is III, Bob was so cotton-pickin’ high at you get a “ bump,” go for it. If you’re •vhat it’s all about. 29:00 his sailplane couldn’t have fallen in lift . . . slow down. If you're in sink Another way to recognize lift is to and hit the ground in five minutes. But . . . speed up. Stay upwind il you can. realize that the sailplane is increasing he wasn’t about to start down until the Don’t thermal hop. Explore what you’ve it ’s distance above the Earth. Brilliant. clock crossed 30:00. got. II you can't find lift, land. But, really that statement isn’t a put-on. Seems like when you want it the Spend a few minutes . . . or hours Being able to “ sec” a sailplane rise . . . worst, you just can’t get it. Bob Andris, . . . or days watching soaring birds. without reference to the ground . . . past-President ol the LSF, thought he Thees guys find and work lift that the takes a trained or wide-angled eyeball: was hexed a coupla summers ago. Flight most skillful R/C pilot can’t touch. And when viewed against a solid licld o f after flight over 25 but under 30 min­ Many are real lead-sleds, too. Course, blue or gray sky, there is no point of utes for the better part of the season. they do use variable camber wings. But rclercnce. The ability to see this action Finally, he had to have Celia sew a cover just watch . . . as men have through the seems to come only with experience. over the Level III insignia on his new ages . . . and you’ll wonder “ How they Don’t press. flight jacket before he went to the do ‘at?” When you figure it out, don’t When you’re in a thermal, and either Nationals. spread it around . . . just call direct .. . holding or increasing altitude, stay with It ’s easy to become a member o f the Collect even.® it until you’re ready to land . . . or get­ ting too high to maintain visual contact MOVING? SEND NOTIFICATION FIRST! . . . or are drifting downwind beyond where you can return to the flying licld. NAME OLD But don’t leave one thermal that’s work­ ADDRESS ADDRESS ing for ya for another that may not (Please P rint) even exist. Chances are you’re going to CITY STATE ZIP lose. Has something to do with “ a bird NAME in the hand.’’ NEW Most guys . . . and gals . . . involved ADDRESS ADDRESS in the League of Silent Flight have (Please P rint) CITY STATE ZIP stories to tell about leaving a thermal Change of address notices must be received one month before date of issue that new early . . . and ending up on the ground address takes effect. Send old address w ith new; old label preferred. Post Office w ill not just a few seconds short of a desired forward copies unless you pay extra postage. Duplicate issues cannot be sent. (light time. When you’re looking for a THE MODEL BUILDER, 12552 Del Rey Drive, Santa Ana, CA 92705 thirty minute ride and touch down at

The MODEL BUILDER 57 PLANS er PEANUTS ζΤ WHEELS THINGS SCALF D R A W IN G S: By Bjorn Korltfrom. (11" x 17" »heel jize). Perfect for »cole modeling. Fw C-19 Autogiro. Scale drawing» by Karlttrom. .50 FOCKE-WULF Fw 56 "STOSSER .50 BELLANCA FLASH, and IRISH SWOOP .50 FOKKER Fit PEANUT plans by Walt Mooney. 65 cents CURTISS 1909 MOOEL A (two »heel») $1 00 B U C K ER J U N G M E IS T E R ...... 50 PITTS SPECIAL. Superb Peanut Scole drawings by Y A K -1 8 P M ...... 5 0 David W. Jones. 123/e span. $1.00 and worth ill Z L IN 1 - 7 7 b A S ...... 50 PILATUS TURBO-PORTER Peanut plans by Hannon. .75c 1932 ASJA J6B JAKTFALK II .50 SAM HELICOPTER plans. Delightful rubber - powered model by John Burkam. Fly in any room!...... 75 cents 1910 FARMAN MONO. Peanut plans by Bill Hannan. Stick & tissue type, bags of area! 13” span... $1.00 ROTOR Whitman's 1938 BONZO RACER. A real Texas Peanut bv R. G. Schmitt. Jr. 13” wing span. Plans ...... 75c CRAFT BLÉRIOT CANARD. Tail-first ontique plans, 15" span, rubber-powered, all-balsa type, by Hannan. . . .75 cents FUN! SEND 25c FOR ILLUSTRATED CATALOG SAM THE FLEEING FLY. By John E. Burkám. An excel­ FIRST CLASS postage add 25c Coiitomio cu»»omert odd 5°- lent rubber-powered helicopter, featuring a rotor di­ W. C. H AN N AN , BOX A ameter of 1 1 y2 ’\ Realistic flyer. Plans...... 75 cents ESCONDIDO, CA. 92025

Wait for all o f this to dry well over­ the formers for the spruce longerons, night and then pull it up. The result is a and glue them in. Pass the spruce just very straight body that will stay straight under the cut for the stab tilt, and while you do the work from the top later, when the cement is dry, block side. Knock out the pieces in the pylon sand the top so that it is flush with the formers, and see that a piece of quarter spruce. The fuselage then has a very inch stock will fit properly into the slight dip on one side that no one will all. notice . . . unless you tell 'em . . . so Next, locate the position for the ply don’t! Go ahead and put on the top stab platform, and lay a straightedge sheeting, with the grain diagonally op­ across. Trim down the side of the fuse­ posite to that on the bottom, stopping lage slightly, until stab tilt is as shown at a point just behind the pylon, and on the plans. Your Satan may require just ahead o f the stab platform location. more or less stab tilt to achieve the Glue the platform on now, and put the proper left glide circle, depending on 1 /8-inch cross-grain sheeting from the several factors, including how tight a aft side of the platform back to the tail glide circle you like. If a large circle is end. After this is all dry, trim all over­ used, it will hunt out thermals and hanging sheeting down flush to the Satan...... Continued from page 25 tighten up into them when it finds one. sides. Windier conditions and small field sizes sketch on the plans. The 1/16 ply has Cut out the fin and sub fin, in­ dictate tighter glide circles. 2-56 blind mounting nuts epoxied in cluding the spruce on the sub fin. Now cut the notches in the top of These must fit very well, as they are place for Allen-head screws to mount the timer, and the proper size hole cut into the doublers to fit the timer. Also, don’t forget the 4-40 blind mounting nuts in the firewall to fit the motor mount. The doublers in the nose section take some time to fit up properly, so that the 1/8 square spruce longerons will fit all the way up the body to the firewall. The effort is worthwhile, as a very strong front end is achieved in this manner. Still, after all the sheeting is in place on the top and bottom, epoxy and light fiberglass or nylon tape is placed over the firewall and front end back to the second former. Leave the fuselage pinned down to the center line after the formers and doublers are in place, cut the 1/8 notches in them, if not already done, and fit in the spruce longerons. They should be tapered and fit all the way to the tail end. After drying, sand down any rough edges, and place the 1/16 diagonal sheeting all the way to the tail end.

5 8 The MODEL BUILDER ADVANCED f r o m PUSH ROD SYSTEMS ______

COMPLETE WITH A L L HARDWARE Pla in f ie l d . Illinois 60544 ® ProROD “ Φ MASTEROD " THE RIGID PUSH ROD SYSTEM THE‘GFførtbfø CaWr PUSH ROD NYROD® ® MASTEROD - THE PUSH ROD THE Cabfo PU SH ROD butt glued to the body. I leave mine the fuselage up. On smaller models such unfinished until they are glued in place as this one, I like to tissue the entire on the fuselage. This way you can body, and then finish it up with either actually align the fin with the pylon, clear or color epoxy. If you use the VINTAGE R-C PLANS and be sure it is straight. I use a piece pacifier fuel system, it is most advisable of thread pulled taught and laid from to pour some Super-Poxy into the cavity the inside edge of the forward pylon for it, and slosh it all around to thor­ notch and laid against the fin. Check the oughly fuel proof the inside in case of other side and when the exact center is pacifier breakage. I hope your formers BEECHCRAFT G-17S STAGGERWING * * _·· *rn. ■· found, mark the fin and fuselage with a fit well inside, or you’ll have epoxy θ 4 WING SPAN. 2 SCALE. MULTI very sharp pencil. Glue securely. With running all over the place! p l a n s : 4 -3 6X 84*' s h E e t s Titebond, the butt joint is plenty strong You can build the landing gear in tnuly Plans S 1 4 .9 5 A SCALE MAST TR PlECF J!______. . . I've never broken one loose. behind the firewall, but I think the type N E w CATALOG 3 Sf DtAll»j ML.n.Vi - If you prefer to cut out grooves for shown has several advantages. For one, SID MORGAN the fins, be sure to extend the fins by if it breaks, it is very easily replaced. For 13157 Ormond .Belleville.Mic h. 48111m« the depth you drop them in . . . the fin another, and more important, it makes area on this airplane is very near the conversion to floats for ROW a snap. it until it can be re-covered. My own critical point, and any off-handed A note in passing on finishes. We are recommendation for covering is good whacking off of fin area will result in a in an age where miracle finishes are oT Japanese tissue. Double-cover if your nifty zero-stability barrel roll just before available from several sources, such as normal flying site is hard on airplanes. your new Satan self-destructs! The fin Monokote and Solarfilm. They are great Use TCP in your dope to stabilize the is intentionally at the near critical point from several points of view; super fast shrinking, and let your flying surfaces so that the airplane will turn into lift covering and finishing time, and very cure, checking them carefully before easily in the glide. A too large amount puncture proof, bright, non-fading col­ each flying session for at least several of fin area can result in an aircraft that ors, water and fuel proof. These cover­ weeks. will actually turn away from lift when ing materials do have some disadvan­ FLYING it gets near it! Wall Mooney had an air­ tages that should be considered before Key the wing and stab now. To check plane that did just that at one time. It use though. In hot, dry weather they squareness I use a piece o f thread tied flew fine, but never thermalled. Then loosen up (Top Flite says the structure around a pin, stuck in the very end of one time when it and another model shrinks . . . and it does, but the net the fuselage, pulled taught and touched were up at the same time, and very result is the same . . . the covering is a from tip to tip, to see that it is keyed close, he saw the one turn into a boom­ bit loose). On a very light structure such properly. If not, trim out the key slot er, and his own turn the other way. Too as a competition free flight, this can be in the wing saddle until alignment is big a rudder was the conclusion, and disasterous, as flutter will set in and the true and then fill in the side o f the slot after some surgery, the problem was wing will literally explode, or wash out with card stock or whatever needed to solved . . . So much for fin areas. one or more of the panels at high fit the key in place so the wing will When the fin and sub fin are in velocities, ending in a crashed airplane. not shift. Do the same with stab. place and dry, sand to a streamlined A super-duty structure helps, but any Now you're ready to see if it glides.. shape. A line drawn down the center slight, covering-induced warps will be Run down to the nearest field with tall of the trailing edge o f the fin is a great lost or at least change when the cover­ grass (Hmmm), and hand glide. If the help when sanding, to ensure that you ing goes loose (even just a little that model hits you on the loot, it may be don't sand the fin to one side, rendering you cannot detect) and will cause ser­ nose heavy. If it does a gigantic stall useless all your efforts to make sure it ious trim changes from one flight to the and crashes into that tall grass, it may was straight to begin with. next. I have a Ram Rod 600 with a be tail heavy. In either case, check that If you have not built the pylon by film finish, powered by a very hot Super the C.G. is in the right place (3/8-inch now, do so. Before cementing into Tigre .29, and if the motor is run on forward of the very trailing edge). If the place, check the C.G. as discussed pre­ anything much hotter than peanut oil, C.G. is right, the fuselage may be bowed viously, then go ahead and finish the the wing does a kind of Irish jig on the up or down. If so, shim accordingly sheeting around the pylon, and finish way up . . . and then down. I've retired until some semblance of a glide is

The MODEL BUILDER 59 Have Fun· Fly the Proven System! Pulse Proportional Rudder-Only a Bag ofPeanuts

A folio of 13 Peanut Scale plans plus other mixed nuts from the King o f the fun-flyers! A total of 15 well tested designs.

BIPLANES LO W W IN G S H IG H W INGS PULSE COMMANDER R O SYSTEMS Completely wired and tested, with trans Send only $5.00 (Postpaid) Walt Mooney, 2912 mitter, receiver, actuator. NICAD BATTERY airborne pack and CHARGFR. switch and con Cabrillo Mesa, San Diego, California 92123. nectors.. T ransm itter battery not furnished

10G15 Baby System ’72 $69.95 10G15T Baby Twin System ’72 S72.95 10G16 Standard System '72 $71.95 out slight stalling tendencies, and open­ power tabs will effect not only the 10G17 Stomper System '72 $74.95 ing the turn may induce a slight stalling turn under power, but the climb angle 26.995. 27 045. 27 095. 27 145. 27 195 tendency. as well. II you put on more tab to get Please Specify Frequency In any event, make small changes more turn, the climb angle will lessen, We have airplane kits designed especially for pulse, as well as accessories and items from one at u time. I use match book covers and il you open up the power turn, other manufacturers in our or card stock for small shims a lot of the climb angle will be steeper. When PULSE HANDBOOK-CATALOG the time. C.G. changes will have no the power pattern is very close, use O nly $1.00 Completely updated, contains data on pulse: ellect on the power if they are not card stock glued to the fin on lop o f How Pulse Works, Installation, How to Fly, and accompanied by incidence changes, and the tab. High powered airplanes respond much more. Price is S1.00 via B U LK T h ird Class Mail. can be used if necessary to trim the quickly to very slight adjustments, so For faster delivery add 50d for FIRST CLASS. glide. take it a little at a time. Ace Radio Control, Inc. Changes in thrust will have no effect Hot pylon ships can be a challenge BOX MB on the glide at all. Remember that for at times, even in experienced hands. Higginsville, Mo. 64037 the most part, thrust adjustments have One change at a time is a good general their greatest effect initially, before the rule . . . that sometimes needs to be airplane builds up speed. I use 8 degrees broken. Only experience can tell you obtained. You can’t tell much from down and 4 degrees left thrust. The lett when it should be broken. Watch every handgliding, so if it shows no radical thrust takes effect right away, and Might .carefully, and keep your thinking tendencies, start power testing. keeps the airplane going nearly straight, cap on. II the ship does something If the C.G. is right, incidence is until other forces take effect and pull squirrely, think it through, right when right, the fin is on straight, with the it into the right climb. it happens, to be sure ol what it did, so right stab tilt and wash-in and wash­ The wash-in in the right panel keeps that thought-out adjustments can be out, down thrust as shown, and side- the wing up under power. II your Satan made. thrust as shown (DON’T forget the has any hard-right tendencies prior to I get a very steep rolling climb ol sidethrust!), it’ll lly. How well is up to getting the nose up, it needs a bit more about 3 turns at lull run, with the air­ you from this point. Use about a 4 left thrust. This is essential, and must be plane Hipping out on the top with no second motor run, at nearly full power delt with as a first priority! loss in altitude. II the pacifier system (just crack it over to a two-cycle, but Then get the right power pattern is new to you, do give it a try. It really don’t lean it down). No, don’t pul the with power tab. Make power tabs with works well, and is much simpler than prop on backwards . . . that’s only ask­ pieces of I/ 16 or I/32 sheet, I/4 wide, the conventional pressure systems. I use ing for trouble. With the short, near-full and as long as needed to do the job. a simple Talone pinch-olf timer. A power run, the model should get the Cut them diagonally, like T.E. stock. flood-ofl can be rigged with a T lilting, nose up good, and be starting into its Glue them on as needed to make ad­ but I have found il unnecessary. With right climb, accelerating rapidly. If the justments. DON’T cut a tab in the fin the pacifier, the needle is so close to glide is O.K., go to lull power, short run, thinking you’ll just move il and pin it shut o ff already (mine runs full bore at and fly it again. Make adjustments as in place, or glue it. There is no way about I/2 turn open) that when the necessary, one at a time, and in small in­ to tell precisely how much you change timer hits the tubing, the motor stops crements. Use very short fuses, to elim­ the tab from one High! to another. very quickly. inate chasing as much as possible. Any really hot pylon ship is very The pacifier requires some practice Some notes on trimming are in order, sensitive to adjustments. To give you an to use without problems. A syringe is especially il you’re new at competition idea ol this so you’ll have a starting needed to I ill it. Know how much luel free-flights. Remember that for the point, mine went from a straight up, your engine requires lor your normal glide, stab tilt shimming under one side slightly lett (dangerous!) pattern at lull settings, to give a lull run without run­ of the stab platform for more or less power, to a bit too hard to the right ning out. Then mark the syringe, and glide turn will tend to decrease the with a tab 1/I6 x Γ4 x 5/8-inch glued alter every flight, empty the pacifier, climb angle somewhat. II the climb is on the right side ol the I in, 3/4 o f the and refill to the proper amount. Re­ too steep, and more or less glide turn is way up to the top ol it. Cutting the lab member, it is inside the luselage, so you desired, this can be used to advantage. down to about I/2-inch produced the need to refill it to know how much is in Also, lightening the glide turn will take perfect pattern. Remember too, that it. Pinch the tubing o il with your linger

6 0 The MODEL BUILDER NYLON PROPELLERS

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when holding the model to start it. UNIVERSAL DUMMY ENGINE CYLINDERS are finely Prime the motor, connect the leads, molded of sturdy high-impact styrene, and feature (Two styles per pack) and crank it up. Release the tube the thin, deep cooling fins for utmost realism. (% ” scale) Price: 49< A vailable in 3 sizes (5 cylinders per pack) 3/e" instant the motor fires. After a short scale: 59c. ’/2" scale: 89c. % " scale: 98c. (V i” scale) Price: 69< while you’ll get the hang of it, and it Also available, engine cylinders in 1" 1 and 2" (% ” scale) Price: 89< scale becomes almost automatic. ASK FOR WILLIAMS BROS. PRODUCTS AT YOUR DEALER. The more you fly and practice with hIÍl l U h s SEND 25« FOR OUR SCALE MODEL ACCESSORIES CATALOG the systems (like the motor/pacifier, »Roir 181 “ B” STREET, SAN MARCOS, CALIFORNIA 92069 D.T.), and so on, the more your chances ol success. Form good habits and prac­ 250 degrees for 10-15 minutes. Remove Mappers are then put in place and the tice as if every flight was the one you from the form and cement the tube washers glued on the trailing edge ol need to get the record. Don’t do some­ scam carefully, making sure it slays shall B. Next, the connecting arms are thing one way one time, and another straight and has no twist. I his can best put in place and similar washers glued in way another time. You'll forget some­ be accomplished by starting the cement­ place. Now glue the tailboom, stab, thing once, and there won’t be a next ing in the middle and working both rudder, and rear hook in place. Last, time until you build another airplane! directions, short sections at a time. using a very minimum amount ol glue I hope these comments are o f value Cement the 1/64 sheet internal braces (use thinned dope) attach a line thread to those of you who are new to pylon and the 1/32 nose sheet in place as to the trailing edge ol the flapper style competition Iree (lights. Any com­ shown. The latter may be formed in a covering. I his eliminates tearing the ments or suggestions would be appre­ similar manner to the fuselage tube. flapper covering, but il too much glue ciated, and can be sent directly to me, TAIL SURFACES is used il adversely allects the flapper Bob Beecroft, 4475 Utah St., San Diego, Make an outline ol the tail surface and performance is decreased. Calitornia 92 I 16. ® from 1/16 sheet. Then cut a 1/32 sq. I LYING strip long enough to go around the lorm Flying is easiest ol all. Place a 5 to and soak in water lor 10 minutes, lake 6 inch loop ol I mm Pirelli rubber on Flapper...... Continued from page 29 the strip and tape one end onto the the ship, balance to the proper CG as stock so the flexibility is equal. The former at the center, using a piece ol shown on the plans. ( I railing edge ol flat rib and the diagonal brace are made masking tape 1/8x1 inch. A minimum wing). Adjust the stah incidence up or Irom 1/32 square. The flapper arm is width of tape should be used in order down as required until a normal glide is made from 1/16 sheet and the connect­ to minimize the wood sticking to it too obtained. II everything is lined up and ing arm from 1/16 square. They arc firmly. Gently pull the wood around the glued securely, it should llv like a shaped as shown on the plans. form until it is past the starting point "b ird ." FUSELAGE and tape down. Always maintain a After some time you w ill note the The fuselage is made Irom a piece "pull” on the wood to avoid buckling. performance decrease. Ibis is caused ol 1/64 or 1/100 balsa sheet, 5/8 by 4 Bake in an oven for 10-15 minutes. by the wing covering losing its stillness inches, and is formed in the following When dry, remove carelully, and splice and stretching. When this happens, just manner. Take a piece ol silk span about and glue at the center. The rudder is recover the Mapping surfaces.^) 5 inches and 6 inches long, wet it and made similarly, using a section ol the lay it on a clean, flat surface. Then stab form. Corsair...... Continued from page 17 place an 8 inch long piece of 3/16 diam­ COVERING AND ASSEMBLY little kingdom, cut the I use I age Irom eter dowel on one end of the silk span. The surfaces are covered with con­ medium I/2-inch balsa. Cut the upper Roll the silk span up on the rod until denser paper or super-fine tissue. Once part ol the luselagc (cockpit) Irom the there is about 2 turns on the dowel. dry and trimmed ol excess tissue, ce­ scrap that is leit, but don't glue il into Place the lusclagc sheet, which has been ment the hinges (A) and wires (B.C & D) place yet as you use the top lot align­ soaked lor about 10 minutes in water, in place with several light coats ol glue. ment ol the wing. Install motor mounts. on the unrolled portion ol the silkspan The center section is then cemented to Next, cut the body doublers Irom and carelully line it up with the dowel. the lusclagc using 1/32 sq. posts. With I/ 16-inch plywood, along with the open­ Now tightly roll it up on the dowel. the shaft in place in the thrust bearing, ings lor the leading edge and bellcrank. Continue the roll until all silkspan is carefully lorm the final two bends mak­ Glue doublers into place on each side ol rolled on. Place in an oven and bake at ing sure they are ol proper length. The the fuselage.

The MODEL BUILDER 61 balsa "sills” lock the bearers in firm -ž RUBBER POWERED SCALE KITS epoxied position. Nyrods were installed for transferring motion from servo to r DESIGNED TO FLY surlace, and a third tube, an "outside" Kavan control tube, was installed to M O D E LS AVAILABLE carry the receiver antenna. This method M IL E S M l 8 ...... K IT $ 1 . 9 8 provides a straight-line inside antenna PIETENPOL AIR CAM PER ...... K IT $ 1 . 9 8 DRUINE TURBULENT ...... K IT $ 2 . 4 9 location that makes removal and replace­ ment quite easy, and avoids the usual Distributor & Dealers Inquiries Invited unsightly canopy-lo-fin rigging. If not available at your dealer, order direct Add 35< The ship, with radio installed, ready for postage & handling Calif residents add 5 % tax. to hook on the winch, came out at ^ T f exactly 3 pounds, on the button, and / ^ \ Peck-Polymers was actually nose heavy until the brass D R UINE TURBULENT Ih I p o b° * - m b lube skid was added. That’s pretty light BY BILL HANNAN 12 IN. SPAN KIT ^ ------' LA MESA, CALIF. 92041 for a sailplane ol this si/e. The loading figures out to approximately 7 -1 /2 Now cut the wing spars from 1 /4-inch the lilts adjoining them, and plank the ounces to the square foot, yet the thin balsa, making the outboard I-inch shot ι­ entire wing with I/16-inch light contest wing section allows the Dart to move οί·. Lay out the I 16-inch ply doublers balsa. While this is drying, cut the stab, along quite rapidly when the nose is and glue them on the wingspar, making elevators and rudder from I/4-inch bal­ tipped down slightly. one complete spar. Cut the two wing sa. Plane and sand them to shape, join On the second test Might, we hooked angle formers Irom I '4-inch balsa and the rudder halves, and hinge the eleva­ a pretty good riser and found that it was the two tip lormers Irom I/8-inch balsa. tors, installing the control horn at this possible to just about pivot the ship on I urn the fuselage upside-down on a Hat time. Cut the false ailerons from 1/4 one wing tip. Within a few minutes the surlace and slide the spar into place. inch balsa stock and sand them to shape. Dart II was getting mighty small and we Slide the angle lormers into position Shape the wing tips and glue them were darn glad that the bottom o f the along with the tip lormers. Slip the onto the wings. Hinge and install the wing and tail were covered in black 1/4 \ I 2-inch leading and trailing edges Maps. Align and install the lulse ailerons, Monokote. into position and pin. Align all this aligning them with the flaps. Install the What can we say about the Orbit stull and glue everything down . . . Not stab and elevators now, along with the radio? In this day and age, proportional to the bench, dummy! pushrod. Glue the top section ol the R/C systems have become like auto­ Now sandwich between the tem­ body into place, also the rudder. Now mobiles for reliability and similarity. plates enough pieces ot 3/32-inch sheet cut the lulse cowling pieces Irom 1/4 The difference is really only in the balsa lor the ribs. Only do enough lor inch balsa and glue them into place. stability and dependability of the manu­ the ribs Irom the angle to the lip. The After this mess has dried, final shape facturer. When Charles Speer literally rest ol the ribs in the center section are all parts ol the ship with coarse and rescued Orbit from the obscurity it was all the same si/e. The ribs that mount line grained sandpaper. rushing toward just a couple o f years next to the fuselage are cut Irom 1/4 Because ol the shorter out hoard ago, “ black boxes” were about as scarce inch balsa. wing, the model will probably not bal­ at the flying field as a dull day at the At this time, cut out the area for ance around the centerline. Add weight Pondcrosa. However, stability and de­ the bellcrank and floor, and install inside the hollow wing lip until ship pendability has been building steadily them. The lun comes when you install balances then glue firm ly in place. since Speer brought his management the pushrods to the two I lap horns While on the subject ol Might trim ­ knowledge into the Orbit picture, and it that are cut so they will lit. The push- ming, be sure to install one washer is reflected in the much-improved qual­ rod on the right goes directly to the under the front end ol each motor ity and reliability of the Orbit line ol flap horn that is anchored in the fuse­ mount flange for right thrust. radios. lage by the spring that comes with it. Cover the whole model with SGM The single slick transmitter which we The left pushrod has to bend in such silkspan. The entire model was painted arc using with the Dart II, and will be a lashion that it can be wrapped with in Navy blue, trimmed in white and testing with a power ship soon, has a copper wire and soldered to the right black. There are many variations ol significant departure from the usual pushrod and still connect with the left colors the ship could be painted, so configuration. Elevator, aileron, and and flaphorn. Confused? Well, think check your color photo lilcs and be rudder, ol course, are on the 3-axis about it a minute and you will see it's our guest. slick, but the 4th channel, for throttle, not really that bad. Good luck and happy flying.φ is located on the left side ol the front Before final hook up ol the push- face. Thus, when used with a conven­ rods to the llap horns, install the two Products...... Continued from page 21 tional full-house aircraft, the transmitt­ I /4-inch rihs on each side ol the I use- during landing, and when the glider er will not be cradled in the traditional luge. Install the rest of the ribs, leaving settles on one wing, the stab is actually S/S fashion, but instead will be held the two next-to-the-luse ribs out, in bent up by the weight o f the plane. somewhat by both hands, with the order to install the leadouts. Install the We bent to shape and attached an 1/8 lei I thumb operating the throttle lever. 1 /8-inch plywood landing gear Moors, inch brass tube skid to the luselagc. It seems awkward at first, but we're splitting one rib to do so. Now bend Installation ol the Orbit radio was willing to bet it won’t take long to the I 8-inch landing gears and install quite easy. The ‘‘2 by I ” servo tray adapt to the .system. them, using J-hoiis. Trim the tip form­ was screwed to hardwood bearers moun­ Further reports on this and other ers and .ingle formers to the outline ol ted across the fuselage. Notched-out Orbit systems will be forthcoming in

6 2 The MODEL BUILDER _S o a # g # a f t ^ eátrel 19 Proven — Highest Performance Model Sailplane currently available

1st Placé^WPKpl National & Regional C(

' H·* Available only f ron ·" » Ψ·*· ,' 'Qualiť^^/G Safi planeš future Products in Use articles. 01 par­ Two different size gaskets will be fitted, years (only a club newsletter editor can ticular interest are some bcautilully to permit a variation o f compression have the proper appreciation for that machined open gimbal sticks that will ratio, and the plug is designed to be fact . . . it’s a longevity record rivaling soon be available. used without a gasket for higher perfor­ Lou Gehrig’s consecutive game streak). It is good to see the Orbit name, mance. My favorite memory of Ocie was at one of the oldest in R/C, in the lime­ The new Tee Dees will be recogniz­ the first US Free Flight Championships. light once again. Just keep it away from able by the screen in the venturi, and a The occasion was used to award him an tree stumps and magazine covers! φ different label on the box, reflecting the AMA fellowship, which he gratefully ac­ corporate image change ( it’s now a sub­ cepted. Then, while he had the spot­ Free flight.... Continued from page 27 sidiary of Leisure Dynamics). Watch for light and microphone, he led us all in and it looks like his efforts will pay off. them at your local hobby shop . . . answering the rhetorical question, ’’Is In January, Cox is expected to come Cox has a history of producing their Free Flight Dead?" . . . so loudly that out with a Tec Dee that won't look loo best engines in the first batch o f a new Bill Winter must have felt his ears burn­ different from the present ones, but the design. II you’ve still got a stock o f old ing at that very moment. We’re going to changes to be made should boost per­ engines, you should be able to improve miss him. φ their performance by using some of the formance of the average engine to the Index to Advertisers level ol the best custom-tuned versions. new parts. Keep the old crankcase as­ The changes reflect Dale's experience sembly, then add a new piston/cylin- Ace Radio Control, Inc ...... 60 with tuning and fitting ,49’s for 1/2 A der, crankcase cover, glow head and A stro F lite , In c ...... 56 Proto Speed, but I'm sure we free (light­ needle valve assembly. Or better yet, B ridi M odel E n te rp ris e s ...... 51 ers won't turn our noses at an extra buy about 3 ol the new piston/cylinder Broz Enterprises, Inc ...... 53 Dumas Products, Inc ...... 3rd Cover 1000 or so rpm. assemblies, and juggle parts till you get FH W hee ls...... 57 Most important changes will happen the best results. Carl Goldberg Models Inc ...... 2nd Cover to the cylinder. The intake ports will be W.C. H a n n a n ...... 58 milled out deeper (using a wider cutter I REMEMBER OCIE Heath Company ...... 45 House o f B a ls a ...... 57 to avoid dull tools messing up the cyl­ Ocie Randall was a familiar figure to K & B M fg ...... 50 inder) and higher (to keep the intake most West Coast free (lighters, and his K ir n - K r a ft...... 2 ports open lor a longer time). Pistons recent demise saddened us all a bil. I K ra ft Systems In c ...... 1 and cylinders will be fit a bit more first met him in 1963, when I traveled M ark's M o d e ls ...... 2 loosely to ease break-in. up to the Fresno Annual for the first M arlow E n g in e e rin g ...... 58 Dick Mathis Design G roup ...... 54 Present crankshafts tend to be out- time. It was apparent from the first that Model Rectifier Corp. (MRC) . . 4th Cover of-round, so the new version will use a Ocie was the heart and soul o f the Fres­ Walt Mooney (Peanuts)...... 60 slightly smaller diameter. Timing will be no group, and his presence gave this Sid M organ (Vintage P la n s )...... 59 slightly changed, so the port opens ear­ contest the unique atmosphere which Peck Polymers ...... 62 lier and closes later. The crankcase cov­ kept bringing all us Southern Californ­ P ro-Line E lectronics In c ...... 55 Sig Mfg. Co ...... 1 er will fit a bit deeper in the case to in­ ians up to Fresno every year. For the Jack Stafford Models ...... 48 crease pumping action. The venturi will rest o f the time, we were always re­ Sterling Models Inc ...... 46 ,47.49 be covered by screen to keep out the minded o f his presence by the regular- Su-Pr-Line Products ...... 59 dirt, and the holes in the needle valve as-clock-work appearance o f the Fresno Tatone P ro d u c ts ...... 2 Tarno A ero E ngine s...... 51 body will be larger to eliminate block­ club’s newsletters, which never missed Vortex Model Engineering ...... 52 ing o f jets. Another big change will be a publication deadline. This is even Williams Brothers ...... 61 in the glow head. It will fit deeper into more remarkable when you realize that Windspiel Models ...... 63 the cylinder, increasing compression. he edited that newsletter for over 30 Earl Wolsleger...... 44

Th· MODEL BUILDER 63 FULL-SIZE PLANS CLASSIFIED ADS (with instructions) Non-commercial: Rate is 25 cents per word with a minimum of $3.00 worth. SERVICE Commercial: Rate is 40 cents per word with a minimum of S5.00 worth. No mail-order discount house ads knowingly accepted. All ads are payable in advance and m a y be for any consecutive insertion period No. 3731 CORSAIR "F4U/C" S2.50 specified. Name and address free. Send ad and payment to; The M O D E L BUILDER. • Profile scale ClL stunter for .40 engines. Classified Ads, 12552 Del Rey Dr., Santa Ana, California 92705. Jig-built wing. B y Jack Sheeks. Collection of 40 years being sold. Thousands Send 25 cents for latest information on Radio No. 3732 SATAN MK III $350 of magazines dating back to late 20's and Control Cars. R.C. Cars, Box 148 Dept. A·, • High performance, 5 2 0 sq. in. Class A early 30's. Includes M A N . Flying Aces, P o p ­ free flight. By B o b Beecroft. South Gate, California 9 0 2 8 0 ular aviation. Bill Barnes, etc. Kits; including No. 9711 BEANPATCH $3.50 Cleveland, Peerless, M e g o w , Continental, etc. Kirtland Hardware & H o b b y Shop, 913 8 Rt. Books, parts, supplies, etc. Catalog and ex­ • An E A A scale-like model for sport R/C 306, Kirtland, Ohio 44094, (216) 951-2220. 45 power. By B o b Upton cellent old F.F. Wiley Post plan $1.00. Specialists in R / C and headquarters for the Joseph W. Fitzgibbon, P.O. B o x 13, Brain­ new QUARTER MIDGET PYLON LEAGUE. No. 1731 SPROOSE GOOSE $4.00 tree, Mass. 0 2 184 E A A type R / C sport biplane, mostly spruce, for 60 engines. By Bill Northrop A E R O M O D E L L E R P L A N S - F.F. R U B B E R . UC, 3-VIEWS. Best-in-Scale catalog of world's No. 1732 SPECTRAL S2.25 Model Engine Specialists, established 1946, finest scale plans, kits, & reference material. Single channel R / C soarer, 57" span, hop up, c hrome fuels, chemicals, engines, COMPLETE-A-PAC, AERO MODELLER, weighs 8 oz. Easily built. A n d y M c A f e e parts. 25 cents brings information. Franny's R A D I O M O D E L L E R , D. Bryant, B o b Hol­ No. 12721 DON QUIXOTE $3.00 C h r o m e Speciality Products, 5 1 3 Vesta PI . man. Catalog 5 0 cents. B o b Holman, P.O. A n 85" span R / C glider of classic lines. Reading, Penn 19605. Ph. (215) 9 2 9 1169 Box 7 4 1 B, San Bernardino, C A 9 2 4 0 2 Easy to build. By Dave Thornburg

No. 12722 TOAD $3.00 One-design pylon racer for .40 engines. Also for sport flying. By R / C Bees

No. 12723 FORTY-NINER $1.50 No. 7722 SAM 5 $2.50 No. 2723 E-Z BOY S2.75 Great little all sheet balsa F/F sport rub­ Top-notch competition Nordic A/2. Full Half-A competition free-flight for '72 ber model. Span 24" By Dave Thornburg wing plan. A winner. By Ron Evans rules and all modelers. B y Al Vela

No. 11721 TORKY $1.50 No. 7723 COMANCHE "C" $3.25 No. 1721 SHOCER $350 Half-A Profile Proto U-Control speed Quick and easy to build, 58 " span stand­ Hot Class A / B Free Flight contender for model. Great for Juniors. B y Dale Kirn off scale, 4 0 power. By Jim Sunday 1972 Rules. By Mel Schmidt

No. 11722 SEAGULL $4.50 No. 7724 TRAVELAIR '2000' S4.00 No. 1722 PUSS MOTH S3.00 R/C flying boat-amphibian for .29 to T w o inch full scale Classic R / C biplane. Chet Lanzo’s famous rubber F/F scale .45 engines. Span 2 7 " By Neil Wh i t m a n Proven flier, 60 power. B y Bill Northrop Puss Moth returns! By Hal Cover

No. 11723 SKYRAIDER AD-4B $1.50 No. 6721 WAKEFIELD S2.50 No. 1723 WHITE TRASH S3.00 Rubber powered, 27-1/2 inch free-flight Highest placing U.S. entry in 1971 A proven, trophy winning R / C sailplane scale. Great flyer. B y Walt M o o n e y World Championships. By Bob White with 7 and 10 ft. span. B y Rick Walters

No. 10721 STEPHENS AKRO $4.00 No. 6722 MONGSTER S3.50 No. 12711 CURTISS-WRIGHT JR. $3.50 R/C Standoff scale of popular aerobatic T w o inch scale quarter midget E A A type T w o inch scale model of famous pusher ship, for .35 .40 eng. By Brad Shepherd biplane pylon racer. By E d Nobora light plane. R / C B y Ralph Fidance

No. 10722 MINI - FAI $2.00 No. 6723 CALIFORNIA COASTER S3.50 No. 12712 TWIN TRAINER $3.00 High performing .010 powered miniat­ All sheet balsa R / C soarer featuring a 9 Sport R/C model for two .30 to .50 ure F/F. Only 24" span. Loren Williams foot Jedelsky wing. By Mat Tennison engines. By Bill Northrop

No. 9721 COLEEN-12 $3.00 No. 5721 SEAHORSE II S3.75 No. 11711 NANCY S2.75 Graceful 8 ft. V-tail soarer has slope or Excellent trainer, designed for land or Scale-like. 9 6 " span R / C glider featuring thermal wing plans. By R a n d y Warner sea, 19 to 35 power. By George Wilson easy construction. By Jack Elam

No. 9722 BABY BOOMER $1.50 No. 5722 HUMMING BIRD S3.00 No. 11712 BI-PRENTICE S2.75 T w i n - b o o m sport free flight pusher for Radio controlled F/F Scale early English Training type R / C biplane for fun flying. .020 power. By Art Reiners lightplane, .049. By Walt M o o n e y Uses .29 .50 engines. B y Bill Northrop

No. 9723 LITTLE TOOT $3.50 No. 5723 WHETSTONE S1.75 No. 9711 BEANPATCH $350 Semi-scale R/C bipe for .40 engines. Half-A Combat ship to sharpen your re­ A n E A A scale-like model for sport R/C Great performer! By D e n n y Elder flexes for contests. B y Steve Fauble 45 power. By Bob Upton

No. 8721 BONZO, R/C S3.25 No. 3721 YANKEE GULL $3.75 No. 9712 FAIRCHILD 22 $2.25 Semi-scale model of W h i t m a n racer, for Expandable R / C soaring glider with 8' Scale old timer for single channel radio F o r m II, FAI, Open. B y Fred Steffen 4" to 12'-0" wing span. By Le Gray or freeflight .020 power. B y T o m Laurie

No. 8722 COUNTERFEIT, A/1 S3.00 No. 3722 MISS COSMIC WIND S2.75 High performance competition A/1 Nor­ Contest winning Quarter Midget racer. dic flying wing glider. By B o b Provart Fast, easy building. B y Fred Reese Price includes Third Class postage and No. 8723 TAYLORCRAFT, F/F S1.50 No. 3723 SIEBEL Si 201 $1.50 reprint of building instructions. A d d 35 Rubber powered, 24-inch scale seaplane. All sheet balsa profile freeflight scale for cents P E R P L A N for First Class postage. A n excellent flyer. By Walt M o o n e y .020 power. B y Jack Headley A d d 50 cents for orders outside of U S A . CALIFORNIA RESI DENTS A D D 5% TAX. No. 8724 SHOESTRING, R/C S3.00 No. 2721 MINNOW $2.50 Easily built Quarter Midget racer, fits Control-line Profile Goodyear racer, SEND TO: THE MODEL BUILDER 1 0 % thickness rule. By Brad Shepherd "Cosmic Wind." By John Penhallow PLANS SERVICE 12552 DEL REY DR. No. 7721 FAIRCHILD 51 No.2722 FOKKER E III $3.75 SANTA ANA. CALIFORNIA O n e inch scale Classic for R/C, also F/F W W I R / C scale for .60 engines. Rudder, 92705 gas or rubber By Hurst Bowers elevator, and throttle. B y Berni Huber

64 The MODEL BUILDER Hot racing models for fun and A the toughest competition

Thriftway Too $9.95 Drag n Fly 40 $36.95

NEW Atlas Van Lines Kit AVL-1.... $6.95

SK Daddle 20 Drag n Fly 60 $49.95

/VfJVSK Daddle 60 KitSK-60.... $34.95

SK Daddle Jr. $9.50 SK Daddle Too $15 95

There's lots new in the Dumas fun and competition line of boat These features are now also standard on our hot SK 20 and kits this year...Atlas Van Lines, an 18" scale model of the un­ SK 40. If you'd rather run than build, take a long hard look at limited hydro, driven by World Champion Bill Muncey. She's the Dumas SK 20F...This fiberglass ski boat is only $49.95 great for display, free or tether running with .049 or .09 and comes in metal flake deck, joined to a white hull with engines. For the real RC competitor the new SK Daddle 60 bulkheads and motor mounts installed. The winning ways of our features a bottom design, by Steve Muck, which Drag 'n Fly's... 20 - 40 and 60 are history, and still provides higher straightaway speeds and faster making history. See your hobby dealer or send turns. The SK 60 has hardware options for out­ 250 to cover postage and handling for our board rudder, water pickup and parallel drive. complete catalog of boats and planes.

Dumas Products, Inc., 790 S. Park Avenue, Tucson, Arizona 85716 • MRC-Enya 60’s already impressive power levels have been improved by a new heat resistant aluminum/silicon piston with a single ring. Compression ratio has been raised to 10:1 and the crankshaft has been strengthened to handle the up to 10% increase in power it carries for 1973. It’s new and it comes complete with MRC-Enya’s reputation for quality. For years MRC-Enya has been synonymous with durability and ruggedness, providing contest and sport flyers with sea­ son after season of trouble-free performance from each powerplant. This traditional long life, and easy starting, coupled with new low vibration, even more dependable idling, and increased power, make the new MRC-Enya 60 the one to beat in 1973. Take a good look at it, at your dealer’s now. Up to 10% more power Higher compression ratio New low vibration design Model Rectifier Corporation 2500 Woodbrldge Avenue Edison, N.J. 08817

Ta a good look at the newMRC Enya 60 Bill BB TV YOU’LL BE SEEING A LO s" MORE OF IT IN 73 Specifications: Loop scavenged; two cycle; shaft rotary valve induction; 2 ball bearings; rotary type throttle valve; 10:1 compression ratio; heat resistant, low expansion, aluminum/silicon piston with one ring; .606 Cu. In. displacement; 15 oz. weight: up to 10% more power than from any Enya .60 ever produced. (All MRC-Enya parts for all Enya engines are in stock... if not availalbe at your hobby dealer, write MRC—Parts Dept. E.) PEANUT TRAVELAIR 2000 Putt, putt, putt! Ed Slobod's Ju m b o Scale Pietenpol Aircamper takes off for the wild blue yonder. If it was n ’t for that big prop By DON BUTMAN. Proof that realism doesn't have to suffer as the size gets smaller, this little T-Air has it all. A nice thing for Juniors too; the nearest school yard can be it's flying field. FREE FLIGHT SCALE By FERNANDO RAMOS φ "bi-plane/‘bi-,plan/n: An airplane pictures states "... high (800 ft.) over plug and mating opening in the fuselage with two main supporting surfaces the Wichita countryside at full throttle, will provide tight and durable wearing placed one above the other.” So says 72 MPH!” This magazine article, plus surfaces to keep the nose plug from fal­ ® On December 4th, the N.A.R. Flight- As with so many events, Jumbo has doing it in the tradition of a Wakefield Merriam Webster’s Pocket Dictionary. the re-issuance of B ill’s plans in the ling out after the motor unwinds. masters held a contest for both jumbo had its share of growing pains. It started ship. This definition is true for the Travel- Model Builder, pushed me into peanut Continued on page 53 Rubber Scale and Peanut Scale. Jumbo out to be a type of old timer event So, for 1972, the rules were changed air 2000, but it lacks in expressing the scaling the travelair. Scale is a specialized event for rubber where the use of old plans such as in order to avoid the same situation that appeal that this airplane has for certain The model is built in the usual scale models having a wingspan of at Megow, Peerless, et al, was encouraged. has occured in the past. This time there two-winger buffs! This is the 4th Travel- fashion . . . 1/16 sq. sides, formers, least 48 inches, and they must carry a The model had to have a pilot, and it was an equal distribution o f points be­ air 2000 that I have built from Bill 1/32 x 1/16 stringers, 1/32 sheet around pilot. I think you’ll agree that this is a was worth 60 of the 100 points allowed tween fidelity-to-scale, workmanship, Northrop’s plans, though it’s the small­ the nose and cockpits, and a bunch of pretty fair size model to be powered by for Judging (The reason being that Judg­ and the pilot. The flying rules were est of the lot. 1/32 sheet wing ribs. The engine cowling rubber, and you won’t find a prettier ing on each model could be done very changed so that a model’s flying points The May 1969 edition of Sport Fly­ protrusions are shaped blocks and the sight than these "biggies” in the air. quickly). Thirty points was given to could not exceed its scale p oints. . . the ing magazine featured Travelairs. This front and "spinner” are of one piece Those of you who don’t live out on craftmanship/scale and 10 points bonus same rules that are in the 1972 AM A included a story by Max Walton of with the prop ‘way out in front. Stick­ the west coast may wonder why any if an old timer plan was used. Flying rule book for indoor scale, page 16. Wichita, who restored a Travelair 2000 lers for fidelity may prefer to move the club would be foolish enough to spon­ points were based on the best of several (I personally would like to see these because he needed a test stand for an prop back a I/4-inch or so and build a sor a contest in December, however, for flights up to a max of three minutes. same rules used for outdoor rubber OX-5 engine! The result was a beeyouti- spinner around it. Five minute Epoxy the past four years of this contest, the Three minutes on a scale job is near scale.) Out of all the models entered ful blue and silver Travelair 2000 that works very nicely for securing the land­ weather could be termed from great to impossible unless one has a "ghost-type” only one had more flying points than became a flying test stand. An inter­ ing gear wires and attaching the fairings. The "bones” of Don's little 13" Travelair. sensational! No doubt, the west coast is of scale model, and for the past three scale points. esting caption under one o f the flying Also, a light coat of epoxy on the nose Ribs could be thinned out a little to simplify. the place to be for year around flying. years this was the kind of model that Very few models are built from old (Stop rubbing it in, Fernando! WCN) was consistently winning Jumbo . . . timer plans, but rather, are enlarged

T o m Laurie holds his Bellanca Airbus while Jack Elem tries to see The Airbus silently takes off for one of several fine and realistic Great shot of the little T-Air climbing out from Don's inspiration for this model ca m e from our 2" scale Travelair, plans for which were published past his cigar to release the winding hook. flights. Scene is Sepulveda Basin, near Los Angeles, California. launch. School yards are big enough. in the July '72 issue of MB . The reduced ma g plans were almost Peanut scale!

34 The MODEL BUILDER The MODEL BUILDER 31 S T R U T lO C /lT/oA/S