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GB743955A
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Improvements in and relating to rotatable wing aerial apparatus
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US2713393A
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Telescopic blade for rotating wing aircraft
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US2717043A
|
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Contractable jet-driven helicopter rotor
|
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US2545736A
|
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Rotating wing parachute
|
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US2637406A
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Telescopic rotor blades and brakes therefor
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GB645271A
|
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Improvements in and relating to propellers for parachutes and helicopters
|
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US2523216A
|
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Sustaining propeller for flying machines and parachutes
|
|
US2585468A
|
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Fuel supply system for helicopter with jet-driven rotor
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US2640549A
|
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Jet-driven sustaining propeller for aircraft
|
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GB606553A
|
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Improvements in and relating to rotating wing parachutes
|
|
US2506873A
|
|
Rotating wing parachute
|
|
GB606447A
|
|
Improvements in and relating to sustaining propellers for aircraft and parachutes
|
|
GB601953A
|
|
Improvements in aircraft
|
|
GB601912A
|
|
Improvements in and relating to rotary wing aircraft
|
|
GB601911A
|
|
Improvements in helicopters
|
|
GB601913A
|
|
Improvements in and relating to sustaining or sustaining and propulsive blades for helicopters
|
|
US2457376A
|
|
Aircraft with rotatable sustaining blades
|
|
US2458855A
|
|
Parachute and the like with rotating sustaining blades
|
|
GB592896A
|
|
Improvements in and relating to rotating-wing parachutes
|
|
GB583767A
|
|
Improvements in and relating to parachutes and the like with rotating sustaining blades
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