Quickee engines are dedicated designs specifically for one class of AMA rulebook Quickee 500 pylon racing. Known in the rulebook as #428, There is a slower class Q-500 (424) that is the same airframe that uses standard sport engines, TT .40 and .46FX depending on the region. The races are run four at a time with a racehorse start on a trangular course with the long leg 608 feet away and the pilot /caller teams fly from within the triangle and around themselves for ten laps. The airframes are very regulated as to wing area and must be box section fuselages and no cowling among other things. 428's are awesomely fast at around 165 mph on a very short couse and a 10 lap race 2.5 miles is typically won with times as fast as 1 min and 3 seconds.

Nelson and Jett Quickee engines are currently the only two competitive 428 engines. There is no carburator just a venturi with an air shut off by the rules and they are .40 displacement engines that both will typically turn up an APC 8.8x9 prop at a static 19,500 and unload in flight to around 22,000 or better. Needless to say the rules reguarding the engines are very strict.

To learn more visit the pylon forum on this board.

John