Hi All,This is something I've noticed from time to time, & is probably due to a balancing act between the aircrafts weight positions, MOI & control surfaces.. etc etc...When travelling at high speed in certain aircraft, in level flight, with the AP holding heading and alt, ALL is FINE & smooth. However when one selects a new heading for the AP to follow, the aircraft starts to bob up & down & loose height when making the turn?? Aborting & hitting LVL stops it & the plane returns to the ALT it was supposed to be keeping to.Other aircraft I've noticed CAN & do remain solid & level when performing an AP turn. even in Turbulance...Does someone know what combination of Params need to be tweaked in either the cfg or air file to smooth out this bobbing?TaAl :-)

AlI'm know genius at this stuff but my observations of flight dynamics might help to explain a thing or two.1) When flying manually and one executes a mid air course correction if you use rudder at all you will lose height.2) this is due to the combination of the alterde lift over the wings and and the yaw of the rudder.3) you would normally alter pitch or throttle to compensate4) in manual flight the alteration of pitch is almost an automatic reflex to to what your seeing on the horizon or your flight attitude readouts.5) the assertion that you lose height and bob is correct in some aircraft with ap initiated. But the onboard computer does compensate it just needs to catch up.6) can I suggest you let the ap execute the full turn and then see what happens, I think you'll find that aircraft will come back to its ap set altitude after a short while.Thats my two pence worth anywayI bet you get a far more detailed explanation of this from some of the other guys.Wycliffe

back to the top for some answers pleaseWycliffe