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  #1  
Old 11-18-2021, 08:31 AM
TJHeller TJHeller is offline
 
Join Date: May 2021
Location: Midland TX
Posts: 2
Default Sheared rudder stop rivets

My -10 is in the paint shop right now, and they were cool with me doing an inspection and double checking SB's while the control surfaces were removed. Anyways, we found 2 sheared rivets on one of the rudder stops. And since 2 were missing, it rotated inboard. I suspect this is more common than not since the rudder will flap in the wind on the ground without something preventing it. See attached pic.
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  #2  
Old 11-18-2021, 08:41 AM
RV10Pilot RV10Pilot is offline
 
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Location: Medford, NJ USA
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Yes typical. I used No. 6 screws in lieu of rivets, but that may prevent the stop from sheering but not the cracking. I inspect that area on every preflight. I have the parts to make the change. Maybe you have motivated me to go through the effort to remove the rudder. Here is a video from base leg aviation showing a failure of the stop. Around 3:00 https://www.youtube.com/watch?v=ZmETwYDRrw4
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  #3  
Old 11-18-2021, 09:28 AM
lr172 lr172 is offline
 
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Location: Schaumburg, IL
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I believe this is a somewhat common failure, as the design is not strong enough for wind related slamming of the rudder, only to stop pilot induced pedal pressure and it is plenty strong for that. I believe the designers assumed the rudder would not be left, unlocked, to flap in the breeze. Maybe not a good assumption, given that the kit doesn't include any provisions for a rudder lock.

I build a solid, one piece stop that installs with the same dimensions as the two piece assembly. It is aluminum and much stronger, as any pressure is carried by 6 rivets, not 3. Pretty sure there are offerings out there in both Al and nylon for purchase.

Larry
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Last edited by lr172 : 11-18-2021 at 09:33 AM.
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  #4  
Old 11-18-2021, 10:23 AM
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Plummit Plummit is offline
 
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Quote:
Originally Posted by lr172 View Post
I believe the designers assumed the rudder would not be left, unlocked, to flap in the breeze. Maybe not a good assumption, given that the kit doesn't include any provisions for a rudder lock.

Larry
Interesting statement, as I've observed the Vans RV-10 demonstrator on display at various fly-ins with no gust lock installed....

-Marc
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  #5  
Old 11-18-2021, 11:20 AM
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DanH DanH is offline
 
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Quote:
Originally Posted by lr172 View Post
I build a solid, one piece stop that installs with the same dimensions as the two piece assembly. It is aluminum and much stronger, as any pressure is carried by 6 rivets, not 3. Pretty sure there are offerings out there in both Al and nylon for purchase.
Which just means you better be real diligent about inspecting for cracks per the SB referenced above.

I've expressed concerns in the past about similar "internal stop" installations on the 2-place models. Replacing the external stop with an internal really loads up the hinge brackets.
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  #6  
Old 11-18-2021, 02:29 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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Bottom line with the 10 is, you can never walk away from the plane outdoors without installing a rudder gust lock. Given that the almost standard Bogart tow bar can be adapted to lock the rudder, and installs/uninstalls in 20 seconds, thereís really no excuse.
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  #7  
Old 11-18-2021, 07:34 PM
Renfield Renfield is offline
 
Join Date: Feb 2021
Location: Wichita,KS
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Iíve done the sizing for the rudder stops on a commercial aircraft. Somebody had the brilliant idea to propose eliminating the control gust lock system to save weight and cost. The dynamic loads on the stop generated by a rudder flapping in the breeze are enormous. A matter of when, not if, damage will result. Needless to say the gust lock system went into the plane.

Secure the flappy bits when not flying.
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  #8  
Old 11-18-2021, 09:21 PM
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ScottSchmidt ScottSchmidt is offline
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Location: Salt Lake City, Utah
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Default Yup!

Yup, Van's learned early on to not use rivets as did I too during a storm in Las Vegas that caused my rudder lock to fail. See date...2009

https://vansairforce.net/community/s...ighlight=RV-10
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  #9  
Old 11-19-2021, 03:52 AM
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cderk cderk is offline
 
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I use my rudder lock all the time as well, but this is one of the other reasons i always try to park with the nose into the wind, even if its inconvenient.
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  #10  
Old 11-19-2021, 06:21 AM
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Plummit Plummit is offline
 
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Quote:
Originally Posted by cderk View Post
I use my rudder lock all the time as well, but this is one of the other reasons i always try to park with the nose into the wind, even if its inconvenient.
That works fine until some guy in a G-36 taxies in and does a power turn to park....

-Marc
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