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  #11  
Old 01-02-2013, 10:28 PM
nharwood nharwood is offline
 
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Wow, I've never flown an RV10, but that looks like a best case scenario after losing complete elevator control.
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  #12  
Old 01-03-2013, 05:26 AM
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pierre smith pierre smith is offline
 
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Adam, the pushrod pivots on a ball and socket type joint. The bolt is not a hinge point or pivot. The ball is.

Only when the bolt itself is a pivot point, like the rudder cable ends, is a castellated nut and cotter key required, as is the case on most RV's.

Sounds like this particular case was a builder/inspector error.
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  #13  
Old 01-03-2013, 06:38 AM
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Auburntsts Auburntsts is offline
 
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Discussion over on Matronics with pics:

http://forums.matronics.com/viewtopic.php?t=95664
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  #14  
Old 01-03-2013, 06:38 AM
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robertahegy robertahegy is offline
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WOW! Really lucky it failed close to the ground. God was with them, for sure!!

Roberta
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Last edited by robertahegy : 01-03-2013 at 06:41 AM.
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  #15  
Old 01-03-2013, 06:44 AM
N427EF N427EF is offline
 
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Default Change Thread Title

Could someone change the thread title,
before this error goes down in history as a RV-10 Nose Gear failure.
Next thing people are going to ask Vans for a redesigned nose gear.

[Done; S. Buchanan]
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Last edited by Sam Buchanan : 01-03-2013 at 07:00 AM.
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  #16  
Old 01-03-2013, 09:19 AM
myrv6180 myrv6180 is offline
 
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Location: Blairsville,GA
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Default RV-10 accident

The push rods will also become disconnected if they are not deep enough into the rod ends.
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  #17  
Old 01-03-2013, 09:20 AM
David Paule David Paule is offline
 
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I bought one of these http://tinyurl.com/adewcw2 to measure the running torques on nuts. It's a 1/4" beam torque wrench, 0 - 60 inch pound capacity. So far I haven't needed to use it on my slow-build RV-3B but it's here for when I do.

Click torque wrenches don't measure running torque, at least I don't know how to get them to do that. Running torque is added to the specified torque to get the torque that we actually use for installation.

There are self-locking castellated nuts available, that have the nylon insert as well as accepting a cotter pin. The ones I've seen are shear nuts. Sorry, I don't know their part number.

Dave
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  #18  
Old 01-03-2013, 09:35 AM
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JonJay JonJay is offline
 
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David - that is a great little tool. I ordered one.

Making no assumptions about this particular incident, even a severely under torqued nyloc nut is very unlikely to fall off of a bolt if the proper thread protrusion is there. I know this from my own personnal experience.

Be very careful using a torque wrench on the AN3 stuff, especially with the click type wrenches. There are many posts archived here where somebody broke the bolt, twisted it right off. Some of the nuts, expecially on control surfaces, are difficult to impossible to get a torque wrench on even with a crows foot or other extension and adding those devices makes operator error even more likely.
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  #19  
Old 01-03-2013, 10:43 AM
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Quote:
Originally Posted by Auburntsts View Post
Discussion over on Matronics with pics:

http://forums.matronics.com/viewtopic.php?t=95664
Anyone else unable to access this link??
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  #20  
Old 01-03-2013, 10:44 AM
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Mike S Mike S is offline
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Quote:
Originally Posted by myrv6180 View Post
The push rods will also become disconnected if they are not deep enough into the rod ends.
True, but if you look at the drawings, there is a jam nut, and it is safety wired.
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Flying as of 12/4/2010

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"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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