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Cozza/Scholl Scorpion


Single-seat single-engined mid-wing monoplane with conventional three-axis control. Wing shape; tapering chord; no tail, canard wing. Pitch control by fully flying canard; yaw control by tip rudders on canard; roll control by half-span ailerons. Cantilever wing; wing profile; double-surface. Aluminium fuselage. Engine mounted at wing height driving pusher propeller.
The Cozza/Scholl Scorpion was only an experimental machine in 1982.
Chicago-based designers Craig Cozza and Mark Scholl wanted to create an ultralight with good soaring ability and which would operate safely in temperatures low enough to weaken composites. So the Scorpion uses an all-aluminium construction, with Dacron wing covering. Pitch control is by fully flying canard and yaw control by tip rudders mounted on the ends of the canard. Half-span ailerons look after roll control.
Particularly novel is the wing construction which allows the pilot to rig the aircraft with 40.0 ft (12.19 m) wings for soaring, or to halve the span by removing a 10.0 ft (3.05 m) panel from outboard end of each wing, in which form the Scorpion will have a more ultralight-like feel. For ease of construction, the fuselage is triangular in cross-section, allow-ing flap panels to be used.
The low-drag shape has allowed the desig-ners to use a small engine, and they have chosen the single-cylinder Cuyuna 215R of 20 hp for the prototype.

Engine: Cuyuna 215R, 20 hp.
Wing span 20.0 or 40. ft (6.10 or 12.19m).
Empty weight 235 lb, 107 kg.
Max cruising speed 60mph, 97kph.


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