New answers tagged helicopter
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What is the approximate lifespan of H125 helicopter
Classic lawyer answer: Well, it depends....
Airframes are typically rated on fatigue life for several thousand hours of flight time. But that is the airframe only; there are a lot of life limited ...
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What is the approximate lifespan of H125 helicopter
It's essentially impossible to know the "lifespan" (depending on what exactly you mean by that term) of the H125 helicopter. Since, as the source below indicates, the longest H125 in ...
- 27.8k
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Can a helicopter autorotate from a hover?
The helicopter will be able to maintain rotor speed using the same "windmill" effect. However, unless the autorotation is initiated just slightly above the ground, the descent rate will ...
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What is rotor damping and how does it affect helicopter stability?
Rotor damping refers to aerodynamic and structural forces that counter blade vibratory motion.
Aerodynamic damping forces are proportional to air density. The most important one is the aerodynamic ...
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Helicopter hammerhead-like maneuver
If you pull a helicopter into a vertical attitude, you'll have to unload the rotor to maintain the vertical path, since the rotor's down thrust is also part of your forward thrust component, unlike an ...
- 122k
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Accepted
Can a helicopter autorotate from a hover?
Look up the 'Dead Man's Curve' for a helicopter. It gives the zones for safe flying (in event of engine failure) as a function of speed and altitude. Hover is the left-side of the curve (where V=0).
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Can a helicopter autorotate from a hover?
Yes it could, because the process of auto-rotation does not rely on the forward motion. Think of auto-rotation as gliding, but in a helical path.
A glider has to constantly descend¹ to maintain ...
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How the planform geometry of rotor is designed for helicopter?
First of all, a basic description of the aerodynamic environment encountered by the blades.
The airflow velocity $V$ seen by a rotating wing is the sum of:
the speed due to the rotation around the ...
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