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Old 12-21-2021, 09:31 AM
bjdecker's Avatar
bjdecker bjdecker is offline
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 1,138

Originally Posted by Scotty G View Post
Maybe I’m speaking Portuguese…
Nope; my coffee hadn't kicked in yet

Disconnect each aileron from the pushrod (at the aileron) and observe the action of the aileron; the aileron will want to drop the leading edge, in a hurry...

If this isn't the case, remove the paint and try again... I wouldn't recommend adding weight to the leading edge pipe.

On the matter of the deadband in the controls, clamp the trailing edge corner of the aileron to the wing tip and then attempt to move the stick left/right (DO NOT USE MUCH FORCE) and see how much slop there is. If ANY, I would start looking at rod ends (Heim bearings), Bell crank pivot bushing/bolt, etc. for any movement.
Brian Decker
RV-7 (Flying)
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Old 12-21-2021, 10:15 AM
Ralph Inkster Ralph Inkster is offline
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,773

Also, check the radius of the aileron trailing edges per plans. This may create the "dead zone" feel at neutral.
built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more
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Old 12-21-2021, 10:17 AM
FinnFlyer FinnFlyer is offline
Join Date: Aug 2018
Location: Bell, FL
Posts: 648
Default Trailing edge

Thought occurred to me: Did that additional paint change the shape of the trailing edge.

I guess to me the real solution would be to have the paint stripped and repaint, but I can understand reluctance to do so.

I see that Ralph beat me to it.

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Last edited by FinnFlyer : 12-21-2021 at 10:18 AM. Reason: Ralph beat me to it
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Old 12-21-2021, 02:21 PM
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wcalvert wcalvert is offline
Join Date: Jan 2019
Location: Anacortes Wa
Posts: 444

Originally Posted by Scotty G View Post

The shop put on an insane amount of material on the ailerons, and it’s changed their balance.
Just my 2 cents, but I'll agree with Carl regarding trying to fix this issue with additional weight or ? ...

When anyone uses the phrase "insane" to describe a modification or behavior, it makes me a bit wary. I read this to mean you think it's excessive. That means it's not right. Proceed back to ground zero and make it right ... it's a flying object with your fanny strapped to it!

Just sayin'
RV-7 Tipper
Bill (Wild) VA-165 '90-'93
Anacortes, Wa

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- Been there, Donated 2022
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Old 12-24-2021, 01:03 AM
PCHunt PCHunt is offline
Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,837
Default Check rigging

I would check the aileron rigging before weighing and/or adding weights.
Proper rigging can solve many issues. Maybe rig both ailerons very slightly low on each side. Much easier than adding weight.
Pete Hunt, [San Diego] VAF #1069
RV-6, T-6G

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Old 12-24-2021, 02:09 AM
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PaulvS PaulvS is offline
Join Date: Aug 2019
Location: Western Australia
Posts: 1,035
Default repaint?

I'm not trying to be a smart arse here, but if the problem is too much paint applied, would you consider getting them stripped and repainted? They're small enough that it could probably be done in a day ot two if removed from the aircraft. I'd do that before adding more weight.
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, fuselage almost done, working on canopy.
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build
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Old 12-24-2021, 08:00 AM
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Walt Walt is offline
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 6,616

I suggest you find someone very familiar with The RV and carefully inspect the installation/rigging. I think it unlikely the paint alone created your issue.
Walt Aronow, DFW, TX (52F)

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Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
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RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags, MTV-9 prop
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Old 12-24-2021, 09:16 AM
Marc Bourget Marc Bourget is offline
Join Date: Apr 2009
Location: Stockton, California
Posts: 353

Mass Balancing Ailerons is more a factor of dynamic acceleration, or gust loading in flight. As it was explained to me, an updraft will cause an unbalanced aileron, with a CG behind the hinge line to "sag" increasing wing camber and augmenting the input by increasing lift.

That said, there is an ongoing arguments between the 100% balance camps and the less than 100% group.

NACA Technical Note 609 provides guidance.
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Old 12-24-2021, 09:23 AM
Bavafa Bavafa is offline
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,845

I am surprise or rather shocked by the number of folks who say not to do anything about it.

Balancing ailerons are important and if there is significant misbalance, then it is required. Years ago on my first build VANS recommended balancing them and even now they say if paint has caused much imbalance. It is also important to balance each separately.

Balancing them is not difficult, especially if one has pre planned for it. Unhook your aileron from push rod and place a small container/cup near where the existing weight is and add weight until your aileron look to be balanced. Then weigh the cup to see how much weight you need. Mine required about 5.5 and 6 oz each plane. Then you can just add that amount of weight next to the original lead weight.
On my planes, I pre-planned for this and added a couple of nut plates for this purpose but you can use a rivenut if you don't have a way of bolting it on.
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Old 12-24-2021, 10:06 AM
Kyle Boatright Kyle Boatright is online now
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,858

Originally Posted by Bavafa View Post
I am surprise or rather shocked by the number of folks who say not to do anything about it.

Balancing ailerons are important and if there is significant ...
Sounds like you're talking about elevators, not ailerons? There is no place to add external weight on ailerons.

But, to the OP. I would check the trailing edge radius and straightness (a strait edge running chordwise should lay straight until it goes off the aft edge of the aileron. It shouldn't encounter a "speedbump" of metal at the TE). If that is OK, then I'd look at removing the paint and repainting with a non-insane amount of paint.
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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