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Maual trim vs. Autotrim

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Hi there everybody,i have a question regarding trimming the busses. Having searched this forum, I now know thatI should be setting a t/o trim of about 1.8 - 2.0 UP to enable rotate, and that the busses also have an autotrim function that kicks in about 5 seconds after gear up.so far so good.having entered +1.8 whilst on the ground, the 321 took off perfectly, the climb out was fine too. At an altitude of about 4500, the ROC decreased and we powered out to our cruising altitude of about FL260.however, the trim setting was still + 1.8, so level flight wasn't quite level after all. No keyboard commands, i.e. the "end" or "pos1" buttons casued any reaction to the trim settings. the spotter plane view showed clearly the leading edge of the ailerons pointing down, the trailing edge up, as the +1.8 trim setting would suggest.so my question i guess is how can I switch between manual trim (for t/o and landing) and autotrim (for ascent / level flight / descent)?any help would be much appreciated, as looking up at the sky for hours on end is a bit boring :()thanks and regards from EDDFEd

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You should find that even setting a pitch trim of -1.8UP or -2.0UP for takeoff that once in the air the autotrim kicks in. I'll have a look at this on a testbed aircraft here and see if I can reproduce your problem and why it is happening.Rob Elliott, EGPE InvernessPSS Airbus Support andAirbus Fleet Training Captain, British Airways Virtual airbus@speedbirdonline.co.ukhttp://www.speedbirdonline.co.uk/airbus.htmlhttp://www.bavirtual.co.uk

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Thanks Rob, I'm interested to hear your results!I tried in the 342 + 343 at the weekend and the problem isn't quite so severe as in the smaller busses - but I still didn't register the autotrim kicking in and changing the aircraft's attitude and the trim display entries.Best from EDDFEd

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