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  #1  
Old 06-05-2017, 10:40 AM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 78
Default Aft fuselage

Can't seem to find it anywhere on the plans. Putting together the aft fuse, just finished the J channel stringers, and clecoing it together.

Do the lower two j channels go between f773 size skin and f779 tail bottom skin, or do they stay to the inside of both skins?

Also, separate subject....how to eliminate any twist there may be when getting ready to drill. with everything cleco'd together, I can grab the tail and easily twist either direction. With pre-punched holes, it is what it is, correct?
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N922WT (reserved)
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Tail kit COMPLETE
Wing kit COMPLETE
Fuselage kit IN PROGRESS
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  #2  
Old 06-05-2017, 11:28 AM
rv7charlie rv7charlie is offline
 
Join Date: May 2006
Location: Pocahontas MS
Posts: 2,038
Default

F-714 aft deck (under the horizontal stabilizer) will set and lock fuselage twist. Just keep the assy more or less aligned while assembling the tailcone.

I'd have to go look, but I'm pretty sure that the stringers all go inside all skins.
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  #3  
Old 06-05-2017, 01:43 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,648
Default J-stiffeners

Yes. The J-stiffener flange lays between ths skin and each rib all the way back. I left them a tad long and trimmed them flush with the rib after they were drilled.
Yes. As mentioned, the deck sets the fuse. Thats not an excuse to build crooked. As much as possible, keep everything straight by using plumb lines. When the canoe was upside down, i leveled the longerons both ways. Later, I drew a line along the bottom skin inside and used plumb lines to keep it straight while building. Once you drill and rivet the Aft Deck, you can't change the twist so check it many times before drilling.
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Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/01/2016. Plus a little extra.
RV-7A #73391, N511RV reserved (1,800+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
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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  #4  
Old 06-05-2017, 01:49 PM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 78
Default

Larry,

So if I understand correctly, the rivet will go thru F773, then J channel, then F779 bottom tail skin, yes?
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N922WT (reserved)
KAUO (Auburn, AL)

RV-7 slow build
Tail kit COMPLETE
Wing kit COMPLETE
Fuselage kit IN PROGRESS
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  #5  
Old 06-05-2017, 02:26 PM
rv7charlie rv7charlie is offline
 
Join Date: May 2006
Location: Pocahontas MS
Posts: 2,038
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Now in the hangar. Took another look.

Stringer is *outside* the tab on the bulkhead, but *inside* the aft bottom skin on mine. Look at the F710 bulkhead; there's a 'big' (noticeable) offset on the tab that's contained in the intersection of stringer, side skin, & bottom skin. This allows the 'stack' to be a bit thicker due to two skins + stringer. If you try to put the stringer between the skins, you'll have to slot (notch) the F739 to go around the tab on the bulkhead (don't do that).

Not saying I did it right, but everything lines up easily if done that way, and there's only one 'joint' exposed to the outside where side meets bottom. If you put the stringer between the skins, you'll have two seams exposed on the outside, and you'll have an unneeded tapered offset (air gap) where the bottom & side skins meet at that rounded corner under the rudder cable exit.

Charlie
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  #6  
Old 06-05-2017, 02:28 PM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 78
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Ok that makes sense. Thanks Charlie!
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Steve T.
N922WT (reserved)
KAUO (Auburn, AL)

RV-7 slow build
Tail kit COMPLETE
Wing kit COMPLETE
Fuselage kit IN PROGRESS
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  #7  
Old 06-05-2017, 08:08 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 808
Default

There appear to be quite a few instructions that are missing in this phase. I never found where it said to actually rivet the aft and center sections together. Read ahead a little so that you won't keep waiting for the instructions to tell you. Eventually I figured I needed to rivet those pieces together before putting on the forward side skins.
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  #8  
Old 06-05-2017, 09:55 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,648
Default Sorry

Quote:
Originally Posted by RV74ME View Post
Ok that makes sense. Thanks Charlie!
Sounds like you got the answer. I was at work. No cell.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/01/2016. Plus a little extra.
RV-7A #73391, N511RV reserved (1,800+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
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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