Aircraft Trimming -A320
Thanks Owain.
Quote from Flight Detent:
"Anyway the're jets, mounted symmetrical, under the wing, exhaust path well below the tail structure... What physical reason do you see for any yawing force?"
None, actually. I was referring the experts to Lantirn's suggestion in post #4.
Certainly never noticed any thrust-induced yaw on the A320 or A310. In fact even the (propellor-driven) DC-3/C47 didn't seem to exhibit any, despite its higher thrust line, and I've always assumed that the effects of the two rotating slipstreams on the fin more-or-less cancelled each other out. That also applied to the high-winged, high-thrust-line Dart-Herald.
As for turbojets and turbofans, my understanding is that any slipstream rotation is negligible, as you suggest. But I sometimes wonder about big fans with short fan cowlings, such as the early JT-9s.
Quote from Flight Detent:
"Anyway the're jets, mounted symmetrical, under the wing, exhaust path well below the tail structure... What physical reason do you see for any yawing force?"
None, actually. I was referring the experts to Lantirn's suggestion in post #4.
Certainly never noticed any thrust-induced yaw on the A320 or A310. In fact even the (propellor-driven) DC-3/C47 didn't seem to exhibit any, despite its higher thrust line, and I've always assumed that the effects of the two rotating slipstreams on the fin more-or-less cancelled each other out. That also applied to the high-winged, high-thrust-line Dart-Herald.
As for turbojets and turbofans, my understanding is that any slipstream rotation is negligible, as you suggest. But I sometimes wonder about big fans with short fan cowlings, such as the early JT-9s.
ExV238,
I vaguely remember back in the late 80s being involved in the modification of a B767-200 rudder actuator system for very similar reasons. We were told that in flight the rudder would physically settle a bit offset.
I vaguely remember back in the late 80s being involved in the modification of a B767-200 rudder actuator system for very similar reasons. We were told that in flight the rudder would physically settle a bit offset.
Join Date: Jul 2009
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This is offset on the indication of rudder trim only. Not the actual rudder position
