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D Ramapriya wrote in
: On Jan 26, 5:31 am, Jim Logajan wrote: As I understand it, the force of the tail plane's elevators typically moves the center of lift forward and backward along the airplane's axis as the elevators are moved up and down (as well as changing the lift magnitude a little - though that is secondary). One presumably enters stable flight when the center of lift is moved to coincide with the center of gravity. Since the CL can be altered by the wing configuration - deployment/ retraction of flaps for a given pitch, e.g., I'm not sure that the CG and CL need to necessarily coincide for stable flight. Also, for a body such as an aircraft, I think the CG would theoretically be somewhere within it while the CL is a point on the fuselage, so their coincidence may even be an impossibility. Yeh, go with that... Where're those aspirin? Bertie |
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