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Number of Motors
More than 4000g (141oz)
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Giro V is a sport autogyro flying model with a free-wheeling rotor - 50" diameter - and propulsive force provided by a
.40 CID glow engine. Elevator, rudder, and throttle control are provided conventionally, while lateral maneuvering is provided by
tilting the rotor head with a strong servo. The most unusual aspect of an autogyro is that the free-spinning rotor provides the
aerodynamic lift to fly the aircraft, and is surprisingly effective! The Giro V's designer, Harold deBolt, is a...
Lou Perretti has designed a superb 1/6th scale model of the German Albatros DV/DVa biplane that was flown with great effectiveness in the First World War by Baron von Richtofen, among others. The model spans 59 inches and is designed for a .60 CID glow engine. Construction details are quite complex with a high degree-of-difficulty, best tackled by extremely skilled model builders and flown by an expert flier.
R. A. Twomey designed Astra to compete in the Wakefield rubber-powered free flight event in the early 50s. The keen-eyed will spot the following design subtleties: a two-piece wing mounted on a tall fuselage pylon, a thin under-cambered wing, airfoil, and dual folding propellers. The semi-circular wire loop fuselage skid was present for the rise-off-ground takeoff requirement and can be eliminated in a modern replica.