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  #11  
Old 02-04-2018, 03:26 PM
Maxrate Maxrate is offline
 
Join Date: Dec 2008
Location: League city, TX
Posts: 380
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I think Vans had a bad run of WD-409s. Mine came out the same way. The steel weldment does not mate correctly with the aft bulkhead. Everything else is CNC machined and fits like a glove. I bet the weldment is put in a jig and hand welded. It came out just a bit out of alignment. Iíll be shimming mine. Here are some pics.

http://www.mykitlog.com/users/displa...g=250369&row=8
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Mark Malone, RV7
Wings complete, SB 14 complied with, fuselage in progress.
N442MM reserved
http://www.mykitlog.com/MikeMike

2017 Donation gladly paid.
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  #12  
Old 02-05-2018, 06:02 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 261
Smile New information from Van's

Just to bring everyone up to speed.

The WD-409 tail spring weldment was removed and the flanges proved to be perfectly aligned in pitch and yaw.

The F-712 aft bulkhead when removed proved to be flat with no signs of being concave.

The F-712 is being pinched when installed and this causes the concave shape.

Van's, after looking at the photo shown in post 1, said I must measure the gap and fashion a shim of the proper thickness and reinstall everything. They also said that getting the aft bulkhead installed was going to be tough but (I paraphrase) that I needed to buck up and do it :- ) )

Soooo...I made a shim and decided to install it between the forward F-711 bulkhead and the forward WD-409 flange (that's what the manual say's to do anyway).

Everything is installed but the F-712 aft bulkhead...I'll try that in the morning when I have some help.

Here's a photo with the shims installed.

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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated 2017
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  #13  
Old 02-06-2018, 10:22 PM
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mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 261
Smile All Over But The Riveting

Here's a photo of the WD-409 installed with the F-712 aft bulkhead in place.

Another shim had to be added to the aft WD-409 flange to make it meet Van's spec's.

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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated 2017
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  #14  
Old 02-07-2018, 08:50 PM
Maxrate Maxrate is offline
 
Join Date: Dec 2008
Location: League city, TX
Posts: 380
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Michael,
How far down does the aft flange spacer go? Does it go as far down as the keeper rivets? Also, does it taper in thickness? Thick at the top, thinner at the bottom? Thanks for the details. Iím going to have to do something similar.
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Mark Malone, RV7
Wings complete, SB 14 complied with, fuselage in progress.
N442MM reserved
http://www.mykitlog.com/MikeMike

2017 Donation gladly paid.
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  #15  
Old 02-07-2018, 09:39 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 261
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Quote:
Originally Posted by Maxrate View Post
Michael,
How far down does the aft flange spacer go? Does it go as far down as the keeper rivets? Also, does it taper in thickness? Thick at the top, thinner at the bottom? Thanks for the details. I’m going to have to do something similar.
The shim is .025" (not tapered) and is 1⅜" deep and not quite as wide as the rear flange.

The shim does not make it to the keeper rivets. (From just above the keeper rivets to the bottom of the aft flange, the flange fits tight up against the F-712 bulkhead)

The plan is the shim will be captured when the vertical stabilizer bolt holes are drilled.

When sizing the shim I pushed some .025 stock into the gap until it would not go any further...marked it and fashioned a shim of that depth. Then I inserted the shim into the gap and drove it down until it was flush with the top of the WD-409 rear flange.

The problem with my installation was the Quick Build fuselage F-712 aft bulkhead would turn concave when installed...removed, it was flat.

I had already installed a .064" shim between the forward WD-409 flange and F-711 bulkhead.

The F-712 aft bulkhead was so difficult to install after adding the forward shims I really did not want to take everything apart. Ergo - the aft shim being driven in without disassembly.

You can see the concave F-712 aft bulkhead in the photo below (this was taken before adding any shims). After adding the forward shim the aft flange still looked like this photo but not as severe.

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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated 2017

Last edited by mfleming : 02-07-2018 at 09:42 PM.
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  #16  
Old 02-08-2018, 09:09 AM
Maxrate Maxrate is offline
 
Join Date: Dec 2008
Location: League city, TX
Posts: 380
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That answers it! Thanks for the excellent details Michael.

Cheers!
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Mark Malone, RV7
Wings complete, SB 14 complied with, fuselage in progress.
N442MM reserved
http://www.mykitlog.com/MikeMike

2017 Donation gladly paid.
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