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  #1  
Old 04-15-2012, 07:12 PM
goldbar goldbar is offline
 
Join Date: Apr 2010
Location: slc, UT
Posts: 29
Default more 779/711/712 queries.

I am a bit miffed, and don't want to screw this up. Looked thru the forums and it seems like this part can be a struggle, so help...



This photo* is looking down between f-711 bulkhead (at the top of the photo) f-712 bulkhead at the bottom of the photo and wd-409 in the bottom against the f-779 skin. So I have the "keeper" rivets installed on the wd-409 connecting it to the f-712 bulkhead. Now the rivet holes are just not aliening on the bottom of f-711 and f-779.. ugh.. f-712 seems bowed in a bit, the wrong direction.

Ideas ?
Drill out the keeper rivets and persuade f-712 the bow a wee bit south ?
Somehow (?) get wd-409 to persuade f-712 a bit south ?

*And why can't I post a photo ? Looking at the bottom of may page it says
"You may not post attachments".. Now why would that be ?
Thanks, much.
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  #2  
Old 04-15-2012, 09:22 PM
AlphaCharlieBravo AlphaCharlieBravo is offline
 
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Location: Olympia,WA
Posts: 210
Default

I would remove the keeper rivets and look to see if you need a spacer between the WD-409/F-712 bulkhead. Actually I would keep them out until the fuselage twist has been removed and after the F-714 aft deck has been riveted on. If the keeper rivets are installed now you have no way of knowing if the F-712 and F-711 bulkheads are aligned. They will be easy to install at a later date as you can reach down inside to buck them. I used some .040 and epoxied it in place onto the WD-409. Hope this helps.



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Last edited by AlphaCharlieBravo : 04-16-2012 at 12:16 AM. Reason: changed F-409 to WD-409
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  #3  
Old 04-16-2012, 10:15 AM
goldbar goldbar is offline
 
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Location: slc, UT
Posts: 29
Default

So, just leave the wd-409 unattached, or use the bolts on 711 and 712 to keep it basically in place ? Seems fair, and a good idea. I believe the 712 bulkhead got a bit bowed in when I set the rivets, so I believe removing those and flattening that bulkhead will hopefully do the trick.
Thanks for your help.
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  #4  
Old 04-16-2012, 04:29 PM
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bird bird is offline
 
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Location: lake charles, La.
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Default its ok

Don't feel bad Goldbar, it says I can't post pics either. But I do have a happy life anyway.

bird
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rv8 entire airframe at airport now, painting done, intersection and gear upper and lower fairings done, maybe order engine around first of year or before the next rate increase.
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  #5  
Old 04-16-2012, 05:39 PM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 1,156
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Here you go...



For what it's worth, the plates were out of parallel on the WD-409 weldment supplied with my kit. I had to make a tapered shim to take up the space at the aft end. Looks bad, but I shared it with Vans and they declared it to be acceptable.

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Last edited by Lars : 04-16-2012 at 05:43 PM.
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  #6  
Old 04-16-2012, 05:41 PM
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N941WR N941WR is offline
 
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Location: SC
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Don't forget to have that thing painted or powder coated before you install it. One local builder didn't do that and had to drill apart the tail section to get it out.
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  #7  
Old 04-16-2012, 05:59 PM
AlphaCharlieBravo AlphaCharlieBravo is offline
 
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Location: Olympia,WA
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Correct.
Tighten the bolts attaching the W-409 to the F-711 bulkhead. Rivet what you can, assemble your fuselage, flip fuselage when ready and then you will need to check for twist before finally riveting on the aft deck. Once the aft deck is riveted on, the fuselage is where it is going to stay. Then it will be easy to set your keeper rivets.
Like Bill said, make sure that puppy is painted before installing. Once those two bulkheads are riveted its not coming out without lots of drilling.

PS Looking at your picture that Lars posted for you it looks as though your keeper rivets have in fact pulled in the F-712 bulkhead.Once they are removed and bolts are tightened through the F-711 bulkhead you very well might need a shim.
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Last edited by AlphaCharlieBravo : 04-16-2012 at 06:29 PM. Reason: added PS/added painted
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  #8  
Old 04-16-2012, 06:16 PM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by AlphaCharlieBravo View Post
...Like Bill said, make sure that puppy is primed before installing. Once those two bulkheads are riveted its not coming out without lots of drilling...
Painted, not just primed. Many primers are porous and you want to make sure the dissimilar metals are protected from each other, even if moisture gets between them.
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RV-9 (Yes, it's a dragon tail)
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www.repucci.com/bill/baf.html
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