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Old 09-16-2018, 06:32 PM
Draker's Avatar
Draker Draker is offline
 
Join Date: Jun 2016
Location: Livermore, CA
Posts: 128
Default When to drill/dimple the aft bottom skin for the F-729 bellcrank rib?

When final drilling the aft bulkheads to the aft bottom and side skins: The destructions are clear to not final drill the F-706 bulkhead to the skins (this gets done later, got it). What about the attached F-729A bellcrank rib? I think it would be good to drill and dimple this part of the skin now, because it will be more difficult to dimple the skin once the aft fuselage is riveted together. I can't find any mention about when to final drill the bellcrank rib, and if I can dimple the skin now rather than later. Any ideas?
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Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/29/2017
RV-7A: Empennage and wing kits complete minus fiberglass, fuselage in progress!
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Old 09-16-2018, 08:51 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,977
Default Bell rank rib

I can't remember exactly but I know it was drilled before the fuse was disassembled for dumpling, priming, etc.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/01/2017. Plus a little extra.
RV-7A #73391, N511RV reserved (1,800+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
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I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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Old 09-16-2018, 09:40 PM
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jcarne jcarne is offline
 
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 603
Default

Yep drill and dimple now. Also please look for any potential rivet clearance issues with this part and the F-728A channel. I can't tell you how mad this made me when I already had it riveted! This link is from someone else on the forum of what I'm talking about, really wish I had seen this ahead of time. Most people relieve these flanges just a bit where there is interference.
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RV-7A Emp. done
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Finish kit arrived
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Old 09-17-2018, 12:00 AM
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Draker Draker is offline
 
Join Date: Jun 2016
Location: Livermore, CA
Posts: 128
Default

Thanks. Yea, I took everything apart already to debur and dimple, but may re-assemble just that bulkhead to drill the bellcrank rib. Seems worth it to me.
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Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/29/2017
RV-7A: Empennage and wing kits complete minus fiberglass, fuselage in progress!
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