All about the racing classes of control line competition model aircraft in Australia, known as Rat Racing, Goodyear and Bendix. Rat Racing
Pictures: 1. An early style Rat racer. 2. Alan Lumsden's 2002/3 Nats winner, a modern 2.5cc diesel powered Rat racer. Early rat racers were about as basic as a combat model (in fact often were combat models), but in the 2.5cc class at least a superior cowled engined, teamracer-like model evolved. An interesting battle developed in this class to decide whether glowplug engines could be beaten by diesels. The best of the glowplug engines were faster, but suffered from a variant of Murphy's Law, which held that the more powerful a glowplug engine, the more certain was its glowplug to be dead when required for restarting ! Diesel engines won many races and still do. Ability to help models along by whipping adds to the fun, and demands considerable physical stamina from pilots if they are to maintain their efforts for the full length of a 20 minute race. Goodyear
Photos:1. Norm Bainbridge, pitman for the Bainbridge/Bainbridge NSW racing team from late 1970's to early 90's, pictured with his Goodyear racer. 2. Garry Turna in action releasing his very quick Goodyear model after a restart at a pitstop. 3. John Hallowell and Mark McDermott teamed up in Goodyear at the Albury Nationals of 2002, flying their Mr. D model into second place. Power is supplied by a Gillott tuned Rossi.
Bendix
Popular models include the Shoestring, Sparrowhawk, Nemesis, Cosmic Wind, Buster, P.40 Flying Tiger, Dago Red, Mustang, Owl Racer, Ol' Blue and Mace Shark. They fly on sixty foot heavyweight lines, pull hard on the handle and are powered by 6cc racing engines like the Nelson and Super Tigre. The motors are open exhaust so they sound loud and powerful and race three in a circle at speeds up to 180 - 190 kph. As the rules limit the models to a 40cc tank, the big motors are usually constrained by a smaller venturi to achieve the necessary 40 plus laps for a one stop 80 lap heat. Unlike unrestricted Open Rat racing, this helps keeps speed at a sensible level. |