Helicopter Flight 
.... The main distinction between helicopter and airplane flight comes from the aerodynamics of
rotary wing flight, ie, the rotor systems. ....
(3768
15
)
Helicopters
.... Both size and shape are in large measure determined by the mechanics of being
rotary-
wing aircraft (as opposed to the "fixed wings" of airplanes). ....
(910
4
)
Development of the Autogiro
.... Refinements in autogiro design included the first use of flapping blades, and the flap hing in
rotary wing aircraft (Johnson, 1980). ....
(1297
5
)
The Flying Automobile
.... Indeed, the tips of its high
wing tail will fold so that the vehicle .... Propulsion will be provided by eight
rotary engines, each with two rotating pistons, or ....
(3640
15
)
Concept of a Flying Automobile
.... Indeed, the tips of its high
wing tail will fold so that the vehicle .... Propulsion will be provided by eight
rotary engines, each with two rotating pistons, or ....
(3578
14
)
