Hi Roberto,
In the context that Dwayne wrote the line you clipped out, his explanation was excellent and the up he refers to here is not up relative to the horizon but up in reference to the pilot's view. If we have the airplane trimmed for straight and level flight, there is trim for a positive AOA. So, up elevator is being applied normally while we're flying along in S&L flight. Then when we roll the airplane, elevator is automatically applied because the trim is set to apply it. As you say, the aircraft will start a descent because all the lift is no longer applied in the vertical, but it will also be turning because the lift is now also in the horizontal. We don't have to apply more elevator to get a turn because some is being applied by the trim we have. If we want a faster turn, all we have to do is pull on the stick and get more elevator. If we want the turn to stop, just push forward on the stick to zero AOA and the turn stops.
To not apply elevator is only possible by actually pushing forward on the stick (to zero AOA) in the context that Dwayne wrote about, which was an airplane trimmed for S&L flight.
Jim
From: Roberto Waltman
Sent: Thursday, October 11, 2012 11:57 AM
Subject: Re: Light-Sport Aircraft Yahoo group Re: What makes an airplane turn?
Dwayne wrote:
> We automatically apply elevator while turning, to keep the nose up. This
> instigates the horizontal vector, allowing the plane to turn.
Easily proven wrong by not applying the elevator and still doing a
(possibly descending) turn.
R.
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