Anti-torque on Eurocopter X3
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Joined: Oct 2007
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From: A better place.
Anti-torque on Eurocopter X3
A question for helicopter specialists.
When viewing an X3 promotional video, a designer states the propellers provide propulsive thrust in level flight, and anti-torque function in the hover.
How do they do the second thing?
Does one side automatically go into increasingly course Beta pitch and the opposite side go into increasingly coarse Alpha pitch as it progressively translates to the hover?
Do the propellers rotate in opposing directions (although i can't see how that would affect anti torque)
Or does the mere fact of having two props on the end of two long levers (the wings) create an anti-torque effect by keeping the airframe stable in the yaw axis?
Confused...
When viewing an X3 promotional video, a designer states the propellers provide propulsive thrust in level flight, and anti-torque function in the hover.
How do they do the second thing?
Does one side automatically go into increasingly course Beta pitch and the opposite side go into increasingly coarse Alpha pitch as it progressively translates to the hover?
Do the propellers rotate in opposing directions (although i can't see how that would affect anti torque)
Or does the mere fact of having two props on the end of two long levers (the wings) create an anti-torque effect by keeping the airframe stable in the yaw axis?
Confused...
Joined: Jul 2012
Posts: 1
Likes: 0
From: germany
anti torque X3
Yes, the two propellers on short-span fixed wings rotate in opposing directions.
To counter the torque of the main rotor at low speed prop differential thrust is used. At high speed, remaining anti-torque function is realized by vertical fin flaps.
To counter the torque of the main rotor at low speed prop differential thrust is used. At high speed, remaining anti-torque function is realized by vertical fin flaps.
