Entry into autorotation on a helicopter with twin rotors
Entry into autorotation on a helicopter with twin rotors
(OP)
Does anyone have any information related to a non-simultaneous rotor passage through the vortex ring state?
Of specific concern is the possibility of roll in a helicopter with side-by-side rotors.
Thanks
Dave J
Of specific concern is the possibility of roll in a helicopter with side-by-side rotors.
Thanks
Dave J
RE: Entry into autorotation on a helicopter with twin rotors
-David
RE: Entry into autorotation on a helicopter with twin rotors
RE: Entry into autorotation on a helicopter with twin rotors
Thanks for the information. The comment in your second post is the one that is of concern.
I suspect that if one rotor entered VRS the roll would happen so quickly that there would be no time to aquire sufficient airspeed to escape.
Dave
RE: Entry into autorotation on a helicopter with twin rotors
Its an interesting question. Essentially during VRS you are descending in a down flowing vertical column of air. Rolling and changing the angle the blade disc is interacting with that column might allow it to enter clean air. From an operational perspective, when the pilot enters VRS, the procedure is to accelerate in any direction, VRS should cease at one ~1 rotor diameter from your initial position during entry. This small distance might occur by itself once the vehicle begins its roll. Hope this helps.
Best,
David
RE: Entry into autorotation on a helicopter with twin rotors
Thanks again for your input.
Dave