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03-10-2015, 11:15 AM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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F-706, F-707, F-708
These bulkhead halves are very flimsy and not flat. Should the flange be fluted somehow to correct?
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ 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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03-10-2015, 11:47 AM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
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I fluted the flanges to flatten the flimsy fragments, but finally folded.
Things don't stiffen up until the aft section is riveted together. Once it's all in assembly it gets pretty rigid. Monocoque construction for real!
__________________
Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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03-10-2015, 12:29 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Fluting
Quote:
Originally Posted by DaleB
I fluted the flanges to flatten the flimsy fragments, but finally folded.
Things don't stiffen up until the aft section is riveted together. Once it's all in assembly it gets pretty rigid. Monocoque construction for real!
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Folded? Been there. Flap spars.
Sounds like I'm OCD again.
Are you saying it goes together ok without being fluted perfectly?
After some head scratching, it looks like the flutes have to be "outies" to get the web flat. Skin would not fit.
Does that sound right?
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ 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.
Last edited by wirejock : 03-10-2015 at 12:40 PM.
Reason: add text
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03-10-2015, 12:58 PM
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Join Date: Jul 2006
Location: Longmont, CO
Posts: 215
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Just get it close for now
Just get things close for now. Once you start putting the skins on the structure, you'll do the final fluting to get everything lined up and laying flat.
David
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David Dalton
Longmont, CO
RV-7 Complete,
Flies like a dream!
Lifetime VAF Member
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03-10-2015, 01:18 PM
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Join Date: Jul 2013
Location: US
Posts: 2,251
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Remember not to make the flange 90 degrees to the web, but something more than that to make them match the angle of the skins (since they're a sort of "cone" in shape).
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03-10-2015, 01:32 PM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
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Quote:
Originally Posted by RV7A Flyer
Remember not to make the flange 90 degrees to the web, but something more than that to make them match the angle of the skins (since they're a sort of "cone" in shape).
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Yeah, that too... sucks to have to go back and make them "un-square" again because you got a little carried away with the prep work. Please don't ask how I know this, it's just too embarrassing to admit.
__________________
Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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03-10-2015, 05:23 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Thanks
Thanks everyone.
Parts are primed and ready to rivet, sans fluting.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ 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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03-10-2015, 05:36 PM
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Join Date: Jul 2007
Location: Molalla, Oregon
Posts: 955
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Larry, I didn't have to flute any of those bulkhead parts at all. Maybe there's enough slight variation in these parts, that yours might require it. But I didn't have to touch mine. Cleco all the skins on and see how things fit, if you haven't done that already. You might be pleasantly surprised. 
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03-10-2015, 08:22 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Thanks
Quote:
Originally Posted by BSwayze
Larry, I didn't have to flute any of those bulkhead parts at all. Maybe there's enough slight variation in these parts, that yours might require it. But I didn't have to touch mine. Cleco all the skins on and see how things fit, if you haven't done that already. You might be pleasantly surprised. 
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Thanks Bruce.
What threw me off is they are flimsy. Plus, I had to scrub them pretty good. They had some spots that looked like corrosion trying to start. All is good.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ 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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