' 1 We think quality right from the start And thinking quality is where you should start when you’re As opposed to conventional connectors. MRC mil spec gold-plated pins are ready to buy a radio. At MRC it means we go further to get recessed for protection The more rugged female the best parts; check and test more thoroughly to assure connector is exposed maximum reliability; design features that give you extra nstead of the pin itself performance on the H vibration. It's part of MRC’s quality thinking every step of the way. T E S T IN G . And last, but by no means least in our quality story, is our quality control story. As far as we know, we’re the only manufacturer to field range check Series 775 5 every system we sell not only on the bench, but in the channels. 4 servos, all metal open field. And this field range check we do not once, but gimbal sticks, nickel cadmium battenes twice. This isn't a spot check either, we check every for transmitter and single system we sell. Twice. receiver, charger and carrying case. First we test all channels to make sure they're function­ ing without troublesome interaction. We test transmitter and receiver under worst case signal conditions. Range is painstakingly checked to measure performance at critical distances. And we take your set to the field to do all this, not once, but twice. What does it all add up to? Straight and simple, it means when you select an MRC radio you're buying an electronic system that has quality you can de­ 775 features precision machined pend on right from the start. all metal open gimbal sticks Every system we make is field range checked There are a number of good radios on not once but twice We don’t knew of any the market, but there are none with our other maker who can make that statement dedicated combination of design, com­ ponent and quality control features. At MRC we know better sets are made right at the start. IN D E S IG N . Our 775 has been engi­ *» *W neered with all metal open gimbal sticks that are virtually free of play at neutral with no zig-zag due to uneven tension. Unlike other open gimbal sticks, these are pre­ cision machined all metal, not metal and plastic. The stick motion is smooth at all times. And because they’re metal, they’ll remain smooth. We also support each sealed conductive plastic potentionmeter with metal bearings to eliminate even the slightest friction. You’ll find this quality is carried into all our systems. Our 772 for in­ stance, is a two channel with open gimbal sticks. A design usually reserved only for more expensive radios. IN COMPONENTS . Here we take great pains in se­ Series 765 5 channels. 4 lecting quality you can appreciate on the field. Our 772, servos, nickel cadmium 765 and 775 systems all feature “Centi-Loc*" connectors batteries for using mil spec gold plated contacts from ITT Cannon transmitter and receiver, charger, Electric. They may be more expensive than conventional carrying case connectors, but we don't compromise our systems any­ where along the line. First, gold is not only durable but Senes 772 2 an excellent electrical conductor. Secondly, the design channels. 2 servos, single is unique. Our connectors have flexible, spring action axis open gimbal sticks. “Twist pin**” contacts that mate and hold even under severe misalignment, providing excellent electrical con­ *A Registered Trademark of International Telephone and Telegraph Corporation tinuity through even punishing landings and rugged "Licensed by New Twist and put it together in the end. MODEL RECTIFIER CORPORATION 2500 WOODBRIDGE AVE. EDISON, N.J. 08817 Mail order only, no dealers or distribu­ tors. For illustrated brochures describ­ ing all of our model yacht products, send $1.00. Vortex Model Engineering Department MB 210 East Ortega Street Santa Barbara, CA 93101 KRAFTS FOUR CHANNEL SYSTEM YESTERDAY AND TODAY Those who did not start radio control In 1964 the Kraft KP-4 introduced the during its early stages cannot appreciate its modern era of radio control with a reliable, progress. Today our control systems ap­ lightweight, and accurate proportional proach perfection in control accuracy and system. response, and with capable pilots, our air­ Continuing our tradition of excellence, craft last for years. These compact light­ we have developed an advanced, high quality weight, and versatile systems permit but low cost system for 1977, the KP-4 A. projects of a scope limited only by our This Sport Series system is designed to imaginations. compete directly with low priced foreign and The first commercial radio control domestic radio control systems. equipment produced in the early 1950’s was The budget conscious enthusiast may by today's standards unbelievably crude. now have the pride of ownership, tech­ One, or sometimes two, tubes were em­ nological superiority, reliability, and fast ployed to give a modest current change to a service inherent in Kraft products. The Kraft KP-4 system in 1964. heavy relay. The relay switched a clock type The low price of the KP-4A has not been escapement driven by tightly wound rubber mechanic. Four control functions were avail­ achieved by reducing quality or perform­ bands which provided a sequential type of able and although control was not propor­ ance. Rather it is the result of new design control. One blip gave right rudder, two tional, a skilled pilot could "blip-blip” his concepts employing the latest in semi­ blips left If the last command position was way around the sky through surprisingly conductor devices to produce a simple and forgotten, one had to guess at what control good maneuvers. Equipment was still very easy to manufacture product of outstanding came next. heavy and required extensive maintenance. reliability and performance. A pound or more of batteries were re­ Early attempts at proportional control From the beginning, the Kraft name quired and since they were not rechargeable, in the '50’s used rapidly wagging controls has stood for quality, reliability, perform­ flying was expensive. The simple receivers and were called “ pulse-proportional.” Only ance, advanced design, and dedication to were relatively non-selective and, therefore, two proportional control functions were customer satisfaction. As a result, the com­ subject to a variety of interference. A great available and operation was very unreliable. pany has grown to become the world's larg­ flying session was one where we succeeded In March 1959, the first Kraft radio was est manufacturer of radio control in making a few turns in some way similar to introduced and soon became the most pop­ equipment Your purchase of a Kraft product our commands and returned with a repair­ ular unit of its kind. is protected by the sound business judg­ able aircraft. By the early 1960's, reed type equip­ ment, integrity, and financial stability of the In the late 1950's resonant reed equip­ ment had been developed to a high degree of company behind it. Radio control manufac­ ment had been developed to a fairly high de­ reliability and relative miniaturization. Some turers may come and go. but we will be here gree of reliability in the hands of a skilled of this equipment is still in use today. tomorrow to service the product we sell today. 1 Write for free catalog « AFT V8TEM8. INC. P.O. BOX 1268,450 WEST CALIFORNIA AVENUE · VISTA. CALIFORNIA 92083 [714J 724-7146 Manufacturer of the Woriďs Finest Proportional R/C Equipment Out Of The Chance Vought 36" Stand-Off Scale R/C Kit FS-36 Wing Span 36" STERLING MODELS · 3620 G ST PHILA PA 1913* II no dealer available, direct orders accepted with 10° addition,- charge tor handling and shipping (60C minimum in U S . $1 2 minimum outside U S ) □ Catalog ol entire line ot airplane control line model kits R C seal and Trainer kits, boat model kits, accessories, etc SOC enclosed □ "Secrets ot Model Airplane Building' Including design, constructs covering, tinishing. ttying. adjusting, control systems, etc 25 enclosed □ "Secrets ot Control Line and Carrier Flying Including pretligh soloing, stunting. Carrier rules and regulations. Carrier flying hint* and control line installation instructions 25c enclosed No checks. Only U S money orders or currency accepted City State 2 MODEL BUILDER \ Skies Of History F4U-1A About The Airplane: The prototype XF4U-1 was first flown on March 29. 1940 The The Corsair's most unique feature was the bent (gull) wing which Corsair was to become the most important Naval Attack Fighter of W W was necessitated by the most powerful engine ever installed in a piston II. and remain in production for 13 years, yet its first service trials had engined fighter, coupled with one of the largest props in the world. Thus ended in failure in its chosen role. It did not reach maturity as a great the inverted gull wing permitted the short, sturdy landing gear required fighting machine easily. It gave notice that it was to be flown and tested for carrier operations. at all times like a true racing stallion, and was an airplane for inexpe The first combat unit to receive the Corsair was VMF-124 and the rienced pilots to reckon with Because it was an advanced design— and first 12 machines arrived at Henderson Field on Guadalcanal or. Feb 12. had a new and untried high horsepower engine the Corsair required 1943. On Feb 13. VMF-124 demonstrated their superiority over the many perplexing and difficult flight tests and service changes before Wildcat by escorting PB4Y-1 Liberators all the way to Bougainville The assuming the role of the Navy's first line fighter following day they saw combat for the first time, and the inexperienced The Chance Vought Corsair had a service life spanning two wars, Corsair pilots were badly mauled by some 50 Zeros.