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  #21  
Old 02-19-2015, 11:11 PM
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rotoiti rotoiti is offline
 
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Tom, the airplane was pre-buy inspected by a respected RV-10 multiple builder/mechanic. This might have happened/worsened during 45 hours I flew the plane after the inspection (maybe?) or it might have been missed then.

Anyway, this issue is now fixed. Here is the aileron hanging on its new bracket:
http://goo.gl/J8x89d

And here is a comparison of old vs. new:
http://goo.gl/aoyGkV

Thanks everyone for your help. This community is awesome.
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  #22  
Old 02-20-2015, 05:18 AM
jtrollin jtrollin is offline
 
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That is one of those areas I check every preflight. I check all the aileron, flap, rudder and HS attach points for any slop as well as that the nuts are still on all the bolts. For me this is one part of the plane that has to be right for safe flight.
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  #23  
Old 02-20-2015, 05:51 AM
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Miro,

In looking at the second photo showing the comparison between the two brackets, it appears that the bolt holding the bracket in place is too short. I can't see at least two threads sticking out beyond the nut.

It could just be the angle that the photo was taken, but I wanted to call it to your attention. Better safe than sorry.

bob
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  #24  
Old 02-20-2015, 12:31 PM
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Quote:
Originally Posted by rleffler View Post
Miro,

In looking at the second photo showing the comparison between the two brackets, it appears that the bolt holding the bracket in place is too short. I can't see at least two threads sticking out beyond the nut.

It could just be the angle that the photo was taken, but I wanted to call it to your attention. Better safe than sorry.

bob
I agree (though the standard minimum is one full thread).
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  #25  
Old 02-20-2015, 08:30 PM
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I triple checked today, both screws have exactly two threads sticking out, counted with my nail.

I flew the airplane today (beautiful day here in California -- which is sad because we need more rain and snow, sigh) for 2.9 hours. It flew fine, I didn't notice any improvements in roll handling etc.

Here is a picture I took over Pacheco Pass:
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  #26  
Old 02-21-2015, 08:50 AM
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MauleDriver MauleDriver is offline
 
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Quote:
Originally Posted by rotoiti View Post
I flew the airplane today (beautiful day here in California -- which is sad because we need more rain and snow, sigh) for 2.9 hours. It flew fine, I didn't notice any improvements in roll handling etc.
One wouldn't necessarily expect such a situation to degrade or improve roll control.

The problem that could occur is flutter. A situation where the control surface would begin to oscillate. This might happen in a diving descent, within the normal flight envelope. You would probably detect it as a buzzing. If lucky, it would stop. If unlucky the control surface would rip itself off the wing. At best you would then notice some degradation in roll control.

Excessive play in a control system can result in flutter which can quickly destroy parts of your plane - in seconds - without giving you any option to recover.

The damage makes one wonder what caused it. I'm thinking it was tied down in high winds with out a control lock and the aileron just banged around for hours on end. However I'd be surprised at that since on my plane's aileron movement is so well damped out by the trim system and AP connections.

Do you have the aileron trim system installed? An AP? Just curious....
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  #27  
Old 02-21-2015, 10:14 AM
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The original owner/builder had a hangar thus he didn't have any gust locks. I don't, I park outside so I purchased Gust Buster and put it on after every flight. Before it arrived, I used the seat belt to lock the stick down.

That makes me think that maybe it got initially damaged in high winds when the original owner was out and about (since he didn't have any gust control devices) and then the damage just progressed. I checked the other aileron, elevator and rudder and those controls are nice and tight in every connection spot. Flaps too.

Yes, the plane has aileron trim and an AP but the servos don't dampen the movement much.
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  #28  
Old 02-21-2015, 10:51 AM
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Quote:
Originally Posted by rotoiti View Post
I triple checked today, both screws have exactly two threads sticking out, counted with my nail.
I hope you are looking the same bolts (not screws) that Bob was mentioning The ones giving concern are the ones that attach the bracket to the aileron (the ones visible in THIS photo).
It sure doesn't look like there are any threads protruding beyond the nut.
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  #29  
Old 02-21-2015, 12:52 PM
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Yes, it's a bolt. Sorry for a mental shortcut. I'll see if I can sneak a photo from the other side showing the threads. Unfortunately, I don't have a borescope (or dental) camera which would make this task easy.
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  #30  
Old 02-21-2015, 02:18 PM
Tom Martin Tom Martin is offline
 
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Is if possible that the pic was taken before the nuts were tightened down? It looks like a gap between the parts.
Also, in the other pic there may be too many threads showing. Just make sure of this otherwise the bolt could actually be loose in the fitting and your problem could come back.
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