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04-03-2019, 01:23 AM
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Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
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Watch out for forward floor stiffener orientation
Here's a reminder to builders working on the forward fuselage. Don't make the mistake I did. This isn't really a gotcha because the plans are very clear:
When building the floor stiffeners, carefully examine drawing 23. For the inboard stiffeners, F-772B-R goes on the right side and F-772B-L goes on the left side. Makes sense. But for the outboard stiffeners, they must be reversed! F-772B-R outboard stiffener goes on the left side and F-772B-L outboard stiffener goes on the right side. If you aren't careful, it will not be obvious that you reversed them because the parts are similar and fit both ways. Later, you will go to fit the cover plates in the cabin and you will encounter this:
I'm confirming with Vans whether it would be acceptable to add a second notch to the cover plates instead of drilling out the stiffeners and re-constructing them, but best not to make the mistake in the first place.
If you've still got the canoe flipped over, remember to double check the orientation of those stiffeners before you rivet!
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/16/2019
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass, fuselage and wiring complete. Canopy complete minus fiberglass. Waiting for the engine to come!
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04-03-2019, 05:38 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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Yip, I did that, but caught it before the skin went on, still a pain to remove those angles....
__________________
7A Slider, EFII Angle 360, CS, SJ.
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04-03-2019, 08:36 AM
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Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
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Yea, after sleeping on it I think it would be better to bite the bullet and remove/swap the stiffeners. I'm pretty sure when I drilled them, they were oriented correctly, so the holes should line up exactly. Access is still great without any cabin innards done. I was thinking I'd have to find a partner to rivet them back on but instead if I rest the fuselage on a couple of sturdy 2x6s and a back rivet plate, I bet I could back rivet those solo. I'll noodle on this today some more and see what I decide to do.
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/16/2019
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass, fuselage and wiring complete. Canopy complete minus fiberglass. Waiting for the engine to come!
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04-03-2019, 09:49 AM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Stiffeners
Yep. Had to drill mine out too. Seems like they fit just fine flip/flopped.
You also have a floor cover that has to go betwee them so you do have to switch them.
__________________
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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04-03-2019, 08:30 PM
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Join Date: Aug 2011
Location: Hillsboro, OR
Posts: 154
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My quickbuild fuselage had these stiffenes installed wrong. Van?s either gave me replacement covers notched to match my fuselage or they gave me covers that without notches and I cut them. Classic Aero Design also make the stuff that goes underneath the forward carpet match my stiffers.
Regards,
__________________
Roy
N174RT (RV-7A) first flight 5/31/11, 1780hrs as of August 2020:
Tip-up, Lycon IO-360 EXP, WW 74HRT, AFS 5600T, AF-Pilot, IFD440, SL-30, echoUAT, D100 for backup, CQ1 headsets, CMW E-Lift
Our other riveted aluminum monocoque RV is a 25' Airstream
Past aluminum monocoque vehicles:
N601RT (CH601HDS) First flight 5/03, 1550hrs after flying 8 years: 912ULS, GNS430W, SL-30, D10A Sold
1995 Midnight Pearl NSX w/BBSC Sold
EAA Chapter 105 board member 2010->2015
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04-03-2019, 11:16 PM
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Join Date: Mar 2006
Location: LA
Posts: 127
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Mine are backwards too. Just had to tell Classic Aero to change the carpets a little. Vans told me not it's not a problem if they are backwards.
__________________
Los Angeles
RV-7 Builder
www.davidkarlsberg.com
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04-04-2019, 12:31 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Quote:
Originally Posted by Draker
Here's a reminder to builders working on the forward fuselage. Don't make the mistake I did. This isn't really a gotcha because the plans are very clear:
When building the floor stiffeners, carefully examine drawing 23. For the inboard stiffeners, F-772B-R goes on the right side and F-772B-L goes on the left side. Makes sense. But for the outboard stiffeners, they must be reversed! F-772B-R outboard stiffener goes on the left side and F-772B-L outboard stiffener goes on the right side. If you aren't careful, it will not be obvious that you reversed them because the parts are similar and fit both ways. Later, you will go to fit the cover plates in the cabin and you will encounter this:
I'm confirming with Vans whether it would be acceptable to add a second notch to the cover plates instead of drilling out the stiffeners and re-constructing them, but best not to make the mistake in the first place.
If you've still got the canoe flipped over, remember to double check the orientation of those stiffeners before you rivet!
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Here is where Van's could just change the part # from L&R to A&B and eliminate the problem.
__________________
VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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04-04-2019, 08:32 PM
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Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
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Ended up swapping the stiffeners. Piece of cake.
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/16/2019
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass, fuselage and wiring complete. Canopy complete minus fiberglass. Waiting for the engine to come!
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