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Old 09-28-2022, 07:22 PM
jsharkey's Avatar
jsharkey jsharkey is offline
Join Date: Nov 2006
Location: Bennington, Vermont USA
Posts: 1,312
Default Right Aileron Trim with Flaps

My RV6 requires right aileron trim when I deploy flaps. Is that common? Without flaps it flies with neutral trim, hands and feet off.

Jim Sharkey
Jim Sharkey
RV6 YO360-A1A
Flying Since 2009
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Old 09-28-2022, 09:43 PM
00Dan 00Dan is offline
Join Date: Nov 2016
Location: Columbus, MS
Posts: 321

Have you checked for flap asymmetry on the ground?
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Old 09-29-2022, 07:11 AM
Desert Rat Desert Rat is online now
Join Date: Aug 2018
Location: Wichita KS
Posts: 1,110

Jim, I see from your signature that you've been flying since 2009. Has it always done this?

I don't know anything about the RV6 specifically, but I've got to think that flap asymmetry in any airplane isn't great.

If an RV6 pro shows up here and says "oh they all do that" I will happily learn something new, but otherwise I would suspect that you have one flap coming down further than the other or otherwise out of rig somehow.
Terry Shortt
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RV7 Empennage & Wing done
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Old 09-29-2022, 09:48 AM
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Roadjunkie1 Roadjunkie1 is offline
Join Date: Jun 2017
Location: Erie, Colorado
Posts: 417
Default Huh....?

Originally Posted by jsharkey View Post
My RV6 requires right aileron trim when I deploy flaps. Is that common? Without flaps it flies with neutral trim, hands and feet off.
Does that happen with a passenger or just solo?
RV-4 2860 SuzieQ
1946 C-90-8 J-3 Cub
The adventure begins when things stop going as planned - Glen Heggstad
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Old 09-29-2022, 10:24 AM
D-Dubya D-Dubya is offline
Join Date: May 2009
Location: Beaumont, Texas
Posts: 249

I gotta agree with Terry on this one. If it hasn't always done this, it concerns me even more. I'd be looking at several things...
- Could a flap be bent?
- Is it possible one side of the steel weldment that deploys the flaps could be cracked? (I'm assuming the 6 is made similarly to the 7 in this regard)
- Is a hardware component loose or damaged?

There may be other causes that I'm missing, but I'd want to find that gremlin before much longer. It may be just a quirk that you live with, but if it's the start of a much bigger problem, then flap asymmetry could lead to a very bad day.
David Welsh
Beaumont, TX
RV-7 N413WD
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Old 09-29-2022, 10:34 AM
John Tierney John Tierney is offline
Join Date: Jan 2006
Location: Vonore, TN
Posts: 620

Check that the rolled edge of the flap looks the same right and left with flaps down.
In phase 1 my stalls would break to the right because my left flap was "curled" too much and was not making contact with the aft end of the top wing skin. At Van's suggestion, a broom handle under the front edge of the flap pulled to "un-curl" the front of the flap a bit fixed the problem.
John Tierney
Vonore, TN
RV-7A - N777JT Flying
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