The Kiwi-Koop is intended as an entry level model for introduction to high performance rubber powered Free Flight, featuring a folding prop. For competition, it may be flow in the FAI (Federation Aeronautique International) F1G "coupe" class. The Coupe D'Hiver class originated in France in the 1940's as the winter cup to spawn interest in modeling during the off-season. F1G rules are simple.Wing Span 36 in./ Wing Area 186 Sq. In. Model must weigh a minimum of 70 grams without motor, and power is limited to a 10 gram rubber motor. Both the prototype and 1st kit built models all came in under the 70 gram requirement and required a small amount of weight to be added, showing that this kit can be built to competitive legal weight without advanced building skills. The Kiwi-Koop has proven to be an easy kit for the beginner to build and trim, but is capable of turning in a contest winning time. Wing Span 36 in./ Wing Area 186 Sq. In.