Model Builder March 1973
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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.