Quote:
Originally Posted by svandamme
yeah but that's just the single rotorblade
I'm talking about the entire aircraft.. which well on a fixed wing is pretty much the wing since the wing is fixed.(ignoring f35 or harriers, those can maintain flight despite stalled wing)
The mast bumping would happen if the helicopter is in the same low G state as a fixed wing
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Think of the entire main rotor as a series of wings. Helicopter blades come in an astounding variety of shapes, sizes, rigidity, aero loading, etc.
If one blade stalls, the "wing" is in stall just like a fixed wing aircraft can, depending on the flight regime, have part of the wing in stall while other parts are still providing lift.
Mast bumping is generally a combination of low G and negative G control inputs. Think of it this way: a helicopter flying straight and level at 40kys is essentially in low G flight. There are control inputs, say an aggressive "push over" that would unload the head from low G to negative G and cause the rotor to "bump" the mast.
The only helicopter I have flown as a PIC that was susceptible to mast bump was is the Bell Jet Ranger in flight school. A lot of our training was in how to avoid negative G's on the rotor head.
I am doing this from memory from a long time ago and I may be misremembering
