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HomeAircraftHelicopterHelicopter Main Discussion › inverted requires trim adjustment ?
04-26-2010 12:48 PM  8 years agoPost 21
Sillyness

rrVeteran

Little Rock AR

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That's stange it's doing it FBL. I've flown my mini-vBar's Protos very nose heavy and it still hovers hands off upright in inverted. The only negative I could find with that heli was in tic-tocs is would wobble because center wouldn't hold the heli solid. Fixing the CG got rid of the wobble on stops.

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04-26-2010 02:56 PM  8 years agoPost 22
heli_headcase

rrKey Veteran

Hovering around Atlanta

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Look at vibration...
Since each time you said the trim changed was at a higher rpm, I'd investigate the effect vibration has on the 3G. I've seen this happen countless times using other FBL systems and it can drive one crazy looking for the drift cause. If you can look carefully at the servos' neutral position at the lower speeds and then the higher speeds, and you KNOW 100% the trims are identical in all flight modes, you'll have the basis of your problem. Moving the FBL unit to a different location or providing softer mounting could be the fix.

I've seen this happen with both Skookum and CSM gyros.


HHC

So many heli's - too little time...

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HomeAircraftHelicopterHelicopter Main Discussion › inverted requires trim adjustment ?
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