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  #1  
Old 01-04-2018, 09:50 AM
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bret bret is offline
 
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Location: Gardnerville Nv.
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Default Wing Bolts

With the recent loss of another fellow RVer I am saddened and somewhat concerned. I would invite respectful conversation on the subject and cautious not to speculate. I'm sure I am not the only one wondering what the heck is going on. Did they miss something like the SB related to missing wing attach hardware? I just noticed there is a SB for the 8 that may be missing 12 center section bolts in QB kits I don't know how many wing separations there are? 3 or 4? but did any of these relate to overloading by Gs or...... I have read somewhere these wings on the 7 and 8 have been tested to 9Gs. Hard to imagine anyone going beyond that? I want to remain respectful to those that are no longer with us because of this issue but maybe this will also save someone who is not aware of these Service Bulletins. Hopefully we can share information to make our playground safer.
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  #2  
Old 01-04-2018, 10:13 AM
pa38112 pa38112 is offline
 
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Location: Clarksboro, NJ
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Default

When I read about this recent incident I also wondered what could have happened. These are the ones that scare me. It sounded like he was a cautious and experienced pilot. Witnesses did not report acrobatics. A well built and maintained plane. A clear VFR day. All of the typical wing separation conditions appear to be absent. Very concerning and alarming. Until we get the final report I think it will all be speculation.
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  #3  
Old 01-04-2018, 11:25 AM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,078
Default In Flight Breakups

You should read the accident report on the 7 in Atlantic City area a few years ago. IIRC the final report took about 2 years.
The 9G test would be standard protocol for 6G limit, ie, test to 150% of proposed aerobatic G limit.
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  #4  
Old 01-04-2018, 11:38 AM
jrs14855 jrs14855 is offline
 
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Location: Lake Havasu City AZ
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Default In Flight Breakups

I probably have posted this before. More than 25 years ago when I was instructing aerobatics in the Pitts S2B I had a trainee from Montana?? who tried to teach himself aerobatics in RV6. He got lost while inverted, did a half loop recovery that finished very close to the ground and near 300 statute indicated. In my opinion the only reason he survived was the constant speed prop. He finally pulled the throttle back to idle and the prop helped keep the speed under some semblance of control.
Guy I knew in Northeast in early days of RV4 did essentially the same thing. He shed some paint around wing rivets but no other damage.
Many probably do not know that in the early days of RV4 Van advocated self taught aerobatics. That changed many years ago.
This would be an excellent time to read or reread Van's outstanding article on aerobatics.
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  #5  
Old 01-04-2018, 05:35 PM
J_Turner J_Turner is offline
 
Join Date: May 2011
Location: Richmond VA
Posts: 85
Default

I read this thread today and looked up the SB's for the -7. Then I went to look at my -7 to see where all of the bolts went and to understand about the missing bolts. I then saw a few holes on the forward spar that were empty. I looked thru the instructions and plans and can't find why they are empty. Can anyone tell me what goes in these holes?(quick build BTW)
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  #6  
Old 01-04-2018, 06:15 PM
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dlloyd3 dlloyd3 is offline
 
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Location: Locust, NC
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Default

Landing gear mount for 7A
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  #7  
Old 01-04-2018, 06:17 PM
Mark H Mark H is offline
 
Join Date: Jul 2011
Location: Indianapolis, IN, USA
Posts: 31
Default Landing gear weldments

On the "A" models, the landing gear weldments for the main gear are bolted to the spar through those holes.
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  #8  
Old 01-04-2018, 06:19 PM
J_Turner J_Turner is offline
 
Join Date: May 2011
Location: Richmond VA
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Thanks guys, should I leave them empty?
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  #9  
Old 01-04-2018, 06:37 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
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Default

Quote:
Originally Posted by J_Turner View Post
I read this thread today and looked up the SB's for the -7. Then I went to look at my -7 to see where all of the bolts went and to understand about the missing bolts. I then saw a few holes on the forward spar that were empty. I looked thru the instructions and plans and can't find why they are empty. Can anyone tell me what goes in these holes?(quick build BTW)
Those holes are left open for attachment of the gear leg brackets for the RV7A. On the RV7 they are supposed to have bolts in them (NO EMPTY HOLES PERMITTED) but I have seen RV7s without those bolts. People with RVs who don't read the drawings/instructions and omit wing spar/carry-through bolts are living very dangerously indeed.
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Last edited by Captain Avgas : 01-04-2018 at 06:40 PM.
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  #10  
Old 01-04-2018, 07:06 PM
J_Turner J_Turner is offline
 
Join Date: May 2011
Location: Richmond VA
Posts: 85
Default Found it!

Thanks Capt., I found it on DWG 34. AN4-12 six places.
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