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  #11  
Old 10-01-2013, 07:26 PM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by rvbuilder2002 View Post
Pole vaulted may be a more appropriate statement.

Sorry for probably crossing the line (and this will probably get deleted by a moderator) but advertiser or not, this sounds far to much like scare tactic marketing to me.

The accident in Canada is well investigated and documented. The cause had nothing to do with the reinforcement part being promoted here.

The most recent accident is in early stages of an investigation. Making an assumption that this part would/might have prevented it is totally out of line.
Not only does this moderator not have any intention of deleting Scott's post, I totally agree with it.

I suspect nearly any part of the airframe can be damaged if not constructed properly/carefully as noted in several threads recently. This does not constitute a design flaw, however.
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Last edited by Sam Buchanan : 10-01-2013 at 07:30 PM.
  #12  
Old 10-01-2013, 07:32 PM
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Quote:
Originally Posted by rvbuilder2002 View Post
Sorry for probably crossing the line (and this will probably get deleted by a moderator)
Hopefully not, it needed to be said.

I think Allan has some great ideas, but I'd be really cautious about reinforcing a piece of primary structure without any analysis of why the part is cracking in the first place. Making a piece of structure stiffer than it was originally designed might fix one problem - if it even exists - but could cause problems elsewhere.
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Last edited by Thermos : 10-01-2013 at 07:35 PM.
  #13  
Old 10-01-2013, 07:56 PM
aerhed aerhed is offline
 
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Alan is telling us about "emails" reporting cracks. Seems this forum would have been all over it. Maybe the moderators have a cover up going. We'll call it "Tailgate".
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  #14  
Old 10-01-2013, 07:58 PM
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LifeofReiley LifeofReiley is offline
 
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Quote:
Originally Posted by aerhed View Post
Alan is telling us about "emails" reporting cracks. Seems this forum would have been all over it. Maybe the moderators have a cover up going. We'll call it "Tailgate".
Now that was TOO Funny! Wonder how many of the tail cracked airplanes are Sliders vs Tip-up? Hang in there Alan.
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Last edited by LifeofReiley : 10-01-2013 at 08:02 PM.
  #15  
Old 10-01-2013, 08:00 PM
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Quote:
Originally Posted by DanH View Post
Caution: Conclusions being jumped.
Agreed. Still, you have to admit it's a fun game.

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  #16  
Old 10-01-2013, 08:40 PM
gtmule gtmule is offline
 
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Quote:
Originally Posted by DanH View Post
Caution: Conclusions being jumped.
concur....

And the engineer in me has to state (as someone else already has) that slapping a doubler on something isn't always productive....
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  #17  
Old 10-01-2013, 09:03 PM
David Paule David Paule is offline
 
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Even so, a jam nut wrench that works with a torque wrench and the rod end would be a useful thing.

Dave
  #18  
Old 10-01-2013, 09:17 PM
Norman CYYJ Norman CYYJ is offline
 
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In the next few years as more and more of Vans aircraft get airborne there will be more and more areas that fail for some reason or another. If we get hyper paranoid over all of these failures and beef them up with dubious parts the plane will be so heavy that it will never leave the ground thus solving all inflight failures. I believe that if the plane is built to Vans specifications and has suffered no damage on the ground or inflight by over stressing these planes are well designed and safe as they are.
  #19  
Old 10-01-2013, 09:26 PM
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Mike S Mike S is offline
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If you go to the video on the Anti Splat site where he talks about the stab mount reinforcement plates, at the three minute to three and-a-half minute area there are photos of a couple parts that have cracked in use. These photos were taken from threads here at VAF.

http://antisplataero.com/Videos.html The video is the second one in line.

Also, here is an old thread to look at. http://www.vansairforce.com/communit...ighlight=crack
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Last edited by Mike S : 10-01-2013 at 09:41 PM.
  #20  
Old 10-01-2013, 10:09 PM
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rv6ejguy rv6ejguy is offline
 
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From the Canadian accident, we can take lessons about observing Vne, Va, balancing of control surfaces and finally that rolling G limits can be substantially lower than straight pulls on some aircraft.

I doubt if there is a systemic problem with RV tails when being flown within the defined envelope and being properly constructed or there would be a lot more failures. Many RVs are flown pretty hard.

Beating on an airplane continuously near, at or over the limits certainly hastens fatigue which is why aircraft used regularly for aerobatics are inspected (or should be) more frequently and in a more detailed way (ask Sean Tucker).

This is just food for thought.

We should wait for the full conclusions of the investigation. In the meantime, it does no harm for anyone concerned to thoroughly inspect these areas.
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