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« on: November 14, 2009, 02:24:39 PM »
gauravag
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Guys, I am trying to trim an airplane and following the NSRCA guide here : http://www.nsrca.org/TRIMA.HTM

When flying my Javelin 90, and inverted, if i bank the airplane, then the nose dips and needs a lot of down elevator to maintain a level turn. Does that mean that the CG needs to be moved back ?

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« Reply #1 on: November 15, 2009, 04:56:35 PM »
anwar
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Some down elevator is expected in such a scenario, right ? 

It is similar to a turn in upright flight, where you have to apply some up elevator to prevent the model from losing altitude during turns.

I am not the best person to comment on this, but if it was a "really bad CG" problem, my expectation is that you would notice it in upright flight also (and NOT just in inverted flight).
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« Reply #2 on: December 12, 2009, 10:23:41 AM »
sushil_anand
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If it flies inverted with minimum down elevator in level flight, the CG is OK.

It will certainly need more down elevator while turning, as Anwar has correctly pointed out.
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