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05-20-2016, 03:11 PM
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Join Date: Jul 2008
Location: Santa Rosa, CA
Posts: 580
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Another Option
To replace the bulk heads is a relatively easy job (speaking from experience) The only downside is having to repaint rivets. Another option is to cut 2 exact sized pieces of .032 or .040 insets to whatever the original thickness of the bulk heads are. Double both sides making sure to flush rivet the aft side and not interfere with the weldament with misplaced rivets. Steve
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05-20-2016, 03:16 PM
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Join Date: Jul 2008
Location: Santa Rosa, CA
Posts: 580
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Addendum to previousl
Spacers of equal thickness between the two doublers on the bottom bolt hole to fill the gap left by missing aluminum.
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05-20-2016, 08:15 PM
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Join Date: Jan 2007
Location: Benton, Kansas
Posts: 259
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F412 and maybe F411?
Indeed, the F412 bulkhead is doubled up. One flange faces forward, and the other aft. You will need 2. As recommended previously, check the next bulkhead forward as well. (F411). The 411 is also 2 bulkheads back to back. I have made this repair for another guy, and it's not that bad. If you just had the mount attached to the bulkheads with clecos, and not bolts, there is a good chance that you elongated the holes on the F411 bulkhead as well. (It tries to pull the clecos through) Look closely.
Not a huge deal, you can fix it.
GB
__________________
Gregg J. Brightwell
Benton, KS
CFII/MEII, ATP, AGI, A&P
-4 Emp and Wings complete!
Fuselage out of the jig!
www.mykitlog.com/gbrightwell
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05-20-2016, 10:20 PM
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Join Date: May 2016
Location: Highland, Illinois
Posts: 11
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thanks AX-O for the help in ordering. I have it removed and the F-411 ahead of it is ok.
Thanks to everyone else for the advice/info, it's exactly what I needed.
Here's a link to my dropbox pics of the removed bulkhead.
https://www.dropbox.com/l/sh/tvQ0P9rXTjIGCSI62kczon
I'm going to order 2 ea F-411 and proceed with the installation.
I'm new to this forum, and the RV, and so am thankful for all your responses/input, it's very helpful.
Thanks again.
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05-20-2016, 10:21 PM
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Join Date: May 2016
Location: Highland, Illinois
Posts: 11
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Oh, I meant I'll be ordering 2 each F-412.
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06-15-2016, 12:42 AM
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Join Date: Jul 2006
Location: near Harrogate, England
Posts: 391
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useful little addition
When you do the replacement you might want to put a couple of countersunk rivets through the newly assembled F-412 and through the rear flange of the weldment, which I think is what the RV-8 plans now call out. That way if you (or any future owner) at any point in the future, are moving the plane without the tail feathers attached and have forgotten the bolts you won't damage the bulkhead again.
Lots of folk are unaware of this problem until it happens. I moved my RV-8 to the airfield and got away with it. I wasn't so lucky with the RV-4 I had shipped from Idaho. Grrr! I guess this is why the RV-8 plans have been amended.
Chris
__________________
Chris Mitchell
Repeat offender;
RV-8, QB, built, flown 150 hours, sold;
RV-4 - attempted repair, rebuild and remediation - abandoned and junked   ;
RV-4 fuselage and wing kits - both at QB stage;
2015-2018 dues paid!
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01-03-2017, 07:11 AM
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Join Date: May 2016
Location: Highland, Illinois
Posts: 11
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Bulkhead replaced
Happy New Year everyone.
Just to follow up after all the advice and recommendations I received when I inquired about my bulkhead that was damaged. I removed/replaced it, all went well.
I've been steadily reassembling the plane. I've installed the vertical, horizontal, rudder and elevators. Elevator trim is connected/rigged. Push pull tube is intalled up to the cabin.
Next the wings will go on. Tanks are off and I'm repairing leaks around the sender and accesss panel. I plan to install wings then tanks after.
Thanks for the help.
Here's a link to pics of the new bulkhead.
https://www.dropbox.com/sh/z82742ypc...161ZDbcwa?dl=0
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