Single-seat,
single-engine, high-wing monoplane with hybrid control. Wing has
swept back leading and trailing edges, and constant chord; no tail.
Pitch control by weight-shift; yaw/roll control
by tip rudders; control inputs through tiller for yaw.
Wing braced from above by kingpost and cables,
from below by cables; wing profile by W. Kasper; single-surface.
Undercarriage has three wheels in tricycle formation; no suspension on any wheels. Push-right to-left nosewheel steering independent from yaw control.
Aluminium-tube framework with optional pod. Engine mounted
below wing driving pusher propeller. Dacron used for covering wing
and underside of mid-chord spar.
The Kasperwing 1-80 was designed
by W. Kasper in collaboration with Steve Grossruck and the prototype
constructed in 1976.
The Kasper effect allows the 1-80 to make
vertical approach to landing while remaining stable in all three
axes during a descent at 160ft/min. with a 154 lb. pilot. It has a
twin spar wing, each wing having six ribs folded into a flattened
'S' shape to give a stable profile.
The Kasper can be summarized as twin rudders
carried on tripod struts at the extremity of each wing in such a way
that the rudders are also used as vortex generators and as air
brakes.
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