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Model Builder December 1978

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Model Builder December 1978 Starts on page 52 Sticks are virtually free of play at neutral. No zig­ zag. Smooth motion Precision machined all throughout. metal open gimbal sticks honed to critical tolerances, outlast and outperform plastic open Sealed conductive pots gimbals. supported by bearings minimize friction and play. Ratchet electronic trim control with 22 detents for precise adjustment. Miniaturized receiver only 2 V2 " x V/λ " X %" is metal encased tor Compact, lightweight added protection, better shielding. flight pack ideal for Va midgets. System includes reverse servo for easier installation. C-Mos receiver circuitry for low current drain, increased dependability. Select from 8 different servos including ball bearing coreless motor Charging jack on the switch harness and mini type. mounts neatly into the side or bottom of your model. And there’s one more thing you should know. The difference in price between an ordinary 5 channel and MRC’s 775 professional system is less than what you’d probably spend for a couple of gallons of fuel. That’s a small price to pay for the best. See the difference at your hobby dealer, today. Send $1.00 for full color, 44-page, MRC Model Aircraft Product Catalog © MODEL RECTIFIER CORPORATION · 2500 WOODBRIDGE AVENUE · EDISON, N.J. 08817 THE ULTIMATE IN RC FLYING FOX 20CC OPPOSED TWIN The Fox Twin is the finest two cylinder model airplane motor ever twins, where a single carburetor would result In one cylinder running produced. Every design consideration and manufacturing care has rich and the other lean. Although the Fox Twin can turn a 17,18 or 19 been taken to make the Fox Twin a really practical power plant inch propeller faster than most chain saw engines of equal displace­ The two cylinder opposed simultaneous firing configuration was ment, its true potential is achieved by letting it rev up. The result Is the selected because equal and opposite piston motions cancel each ability to fly your airplane in a realistic manner, using a scale type pro­ other out vibration wise and produces a smoother running configura­ peller, but if you are performance minded, then put on a smaller pro­ tion than the alternate firing in line motor. In addition, the opposed peller and really move out. We recommend a 15-6 for average models. cylinder configuration cools better and fits most scale models better. Each Fox Twin is factory run at full power, assuring you that when The cylinder configuration is of the most modern and advanced you buy this and put it in your model, you can fly. The carburetor has schneurle porting, featuring Fox exclusive angle side flow bypasses. been adjusted and synchronized for atmospheric conditions at the The cylinder is glass hard and the pistons are factory. Unless you are at a rather high al­ made of the hardest piston alloy available. titude, no further adjustments should be The crankshaft is of hardened steel, and ex­ necessary tremely massive compared to any other motor you have seen. The massive Fox T w in ................. S250.00 SPECIFICATIONS: crankshaft construction was necessary be­ Bore .......................... .907 cause the terrific power of earlier experimen­ S tr o k e ....................... .937 tal cranks twisted in two for conventionally H.P. (at 14,000 RPM) 3 plus proportioned shafts. The dual carburetion Weight | ? b s . , 8 oz. FOXMANUFACTURING CO. makes possible adjusting each cylinder for 5305 TOWSON AVE FORT SMITH. ARK 72901 Standard accessories: Firewall type motor maximum power, a failing of most earlier PHONE 501-646-1656 mount, carburetor interlink, and fuel line "Y" fitting. For More Information - Call: 1-501-646-1656. LIST PRICE *24.95 Patterned after Top Flite's original NOBLER, the Other features of this latest in stunt design are full winningest U-Control in history. Top Flite's all new size plans, precision die cutting, hardware, formed TUTOR is the perfect beginning stunt flyer or the wire landing and tail gear, tank mountings, nylon ideal practice ship for full stunt competition. TUTOR bellcrank, and adjustable lead-out guide. TUTOR continues Top Flite’s long tradition of outstanding kit . one more reason Top Elite continues to be the design with many important features. choice of champions. Highlights of the new TUTOR kit include: a spe- c al construction feature assuring an easily built, accurate, and warp-free wing: a D-tube leading •elge aioviding a lightweight wing 20% to 25% stronger than conventional design; all balsa struc­ ture with maple motor mounts plus preshaped flaps and elevator, and a precision machined one-piece plywooc: reinforced fuselage with accurate cutouts tor wing, motor mounts, and stabilizer. Top Flite Models, Inc. 1901 N. Narragansett Avenue Chicago, Illinois 60639 f C m , p o in t s ^•rect drive servo mechanics Crimped c o n n e c t Our servos are molded of long wearing rugged nylon rather than the cheaper short life materials used in competitive servos. For accuracy, our servos have their reference potentiometers ac­ tuated directly from the output drive rather than indirectly Built-In charge receptacle through a gear which, because of gear teeth backlash, adds to centering error. Clockwise and counterclockwise servo rotation Servos are supplied with four or more channel sets, two rotating clockwise and two counterclockwise. This feature greatly simplifies the radio control in­ stallation. Open gimbal control sticks A charge receptacle is Our control sticks are the wired into our switch harness so that you may charge your open gimbal type for model without the inconvenience of disassembly. Other systems better feel and ac­ require that the battery pack must be disconnected from the curacy. Their design receiver and be connected directly to the charger. eliminates any possiblity of centering error and is self com- ■^Ě Plug-in receiver antennas pensating for wear. These are but a few of the fine points which when added together make our radio control equipment the world's finest. Write for our free catalog and get the complete story. in receiver antenna is standard , tt,e antenna receivers. This means that you may 11 available in stan- 450 W. California Ave. ently in your model. Extra antenn,as antennas P.O. Box 1268 d special RF loaded short lengths. Th ^ boats. Vista, California 92083 (714) 724-7146 ecially convenient for small aircraft, LIGHT WEIGHT POWER SPEED BANTAM ^ II« ^ MIDGET W B ^*1WB BY ISIOVAK electronics Finally, you can purchase a servo that is light enough to fly a 1/2A airplane, and strong enough to fly a big .60. NOVAK ELECTRONICS proudly announces the introduction of the BANTAM MIDGET SERVO. By working closely with Dick Rehling, of D&R Products, we have been able to produce a servo that has the power, strength, speed, and durability to perform in any type of air­ plane. These new servos use the highly advanced Signetics 544 IC, offering internally regulated power supply, dynamic braking, linear ramp timing, and an exclusive temperature-compensated dead-band circuit. Servo reliability is further enhanced by the use of the Clarostat conductive plastic potentiometer and external silicon drive transistors. NOVAK ELECTRONICS IS INTRODUCING SPECIFICATIONS FOR BANTAM MIDGET A NEW CONCEPT IN AIRBORNES. TORQUE: .......................... 21 oz. in. Choose one of our colors to mix or match TRAN SIT TIM E: . 0.3 seconds/100 degrees with your existing equipment. Tell us your SIZE (inches):....... 1. 125H x 0.6W x 1.43L radio manufacturer, and we will supply servos, WEIGHT: ........ 24 grams, or .846 ounces battery packs, and switch harnesses with the OUTPUTS: Rotary wheel, arm, adjustable proper plugs and specifications to match your arm. Compatible with A L L 3-wire digital radio system. systems, except Pro Line. BANTAM MIDGET, Assembled ............... .. $29.95 Battery, 100 MAH. Square (35 gms, 1.2 oz.) . $15.95 Battery, 250 MAH, Square (60 gms, 2.1 oz.) . 15.95 Battery, 450 MAH, Square, (100 gms, 3.5 oz.) . 15.95 Battery, 450 MAH, Flat, (100 gms, 3.5 oz.) . 15.95 Miniature Switch H arness.................................... $7.95 Switch Mount, Bulkhead ty p e .............................. 1.00 Tray, Bantam Midget, Vertical.............................. 1.00 Tray, Bantam Midget, Side M o u n t..................... 1.00 WHEN ORDERING. PLEASE SPECIFY YOUR BRAND OF R/C SYSTEM AND COLOR PREFERRED (WHITE, BLACK, RED, BLUE, YELLOW, ORANGE, IVORY). NOW! Also available in KRAFT GOLD. COD, Shipping, Handling, and Insurance .... $2.50 Actual Size Cash, Money Order, Bank Draft, Certified Check, Shipping, Handling, and Insurance............... 1.00 Three weeks delay on personal checks. DEA LER INQUIRIES PROMPTL Y ANSWERED Foreign orders add 15% California Residents, add 6% Sales Tax NOVAK ELECTRONICS, 1915A, South Evergreen St.f Santa Ana, CA 92707 Ph. (714) 549-3741 2 MODEL BUILDER Bid SAVINGS AT ORANGE COAST HOBBIES LEISURE ELECTRONICS = OUTPUTS ROTARY WHEEL. ARM ADJUSTABLE ARM COM RESISTOR CAR WITHOUT RADIO - 6 CELL p a t ib l e w it h a l l d ig it a l r a d io s y s t e m s e x c e p t p r o Choose from Alfa, Vette or Porsche Body Style LINE SPECIFY RADIO $2j) Comes with painted lexan body, durable lexan chassis, speed TORQUE 21 OZ IN TRANSIT TIME 0 3 SECONDSHOO DEG SIZE control, high speed electric motor, roar legal. (INCHES) 1 125 Η X 06W X 1 43L WEIGHT 24 GRAMS OR 846 OUNCES ------------------------------------------------------------------------------------------------------------------ NEW ASSOCIATED ASSOCIATED WANTTO BE A FAMOUS RACEDRIVER?...JOIN ELECTRIC “ ELECTRIC” THE ORANGE COAST HOBBIES RACING TEAM. 1/12 SCALE ELECTRIC R/C RACE CAR ASSOCIATED RCI Complete Car BY ASSOCIATED List $135. OCH Reg. Low Price S 1 19 95 T' SPECIAL LIMITED OFFER 3 m' 4 % RC100. ..$99.98 RC200...$149.95 6 CELL - THORPE..$195.00 wiih 1 /12th CHOI« Of 4NV B00V Ready to Run Scale TITAN CHASSIS..
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