Fuselage repair help

Post-War Aeronca Champ airplanes
DMichaels
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Post by DMichaels »

gusc wrote:I haven't read anything so far about that brazed repair. Is brazing an authorized repair to fuselage tubing?

I don't remember ever reading about brazing nor have I ever seen it used anywhere.

My Navion had furnace brazed landing gear struts but that is another thing entirely.
That repair is history, I doubt it was legal.

Dan
DMichaels
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Post by DMichaels »

I think I have it all straighten out. I have to do some more measuring, but things are looking up. Notice the stringline I used this as the reference line on the plans. The tail is way off also. The transit level really made things easy to see.

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Dan
gusc
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Post by gusc »

Maybe someone has already posted it but you must get every speck of brass off the steel before it is welded in the same area.
Gus Causbie
Ash Flat, AR
N83564, 7AC-2235, A65-8
DMichaels
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Post by DMichaels »

Thanks, all new tubes will go on though.

Dan
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Post by DMichaels »

I've done all the measuring and I am within 1/32 before welding any tubes. Cage is level front to rear and side to side. I cut a few more tubes that I was not going to cut until installing one of the new ones opposite, but that was the tube that was keeping it not level front to back. I found a nice carbide cutter that goes in my roto zip tool that cleans up the joints really well. I was going to use a 3/4 and 5/8 drill bit but they were 30 and $40.00.

I decided to cut the front horz stabilizer tube on both sides to remove the tail peice of the backbone. I will then use an internal tube inside both tubes to reconnect as well as the original piece on the outside.

I am also going to use the patch as per #57 on the front door post just for safety.

Dan
DMichaels
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Post by DMichaels »

Her is a pic of Jack the owner of the plane.

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Dan
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Post by DMichaels »

I have the front and back tacked, two of the hardest repair's done. I took a lot more out than I planned on in the front but after I did everything came together.

Dan

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DMichaels
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Post by DMichaels »

All the welding is done except for the door mouldings I took off. I just got done welding the hinges back on for the door. Tomorrow I will sandblast and weld them on. Then on to painting the fuselage. Started looking over the wood :shock: Could be fun.

Dan
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Nathan K. Hammond
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Post by Nathan K. Hammond »

Dan, I'm impressed with your repair. I would have looked for a new fuselage. :oops:

nkh
7AC-5691
Super 85-12F @ DVK
skot7ac
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Post by skot7ac »

No kidding, that looks really nice. If you were by SE Michigan, I would be talking to you about two pre war Chiefs!

Scott
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Post by DMichaels »

Nathan K. Hammond wrote:Dan, I'm impressed with your repair. I would have looked for a new fuselage. :oops:

nkh
That's what I said when I first looked at it. Then I just started to work on it. I called the owner so he could see how bad it was in case anything went wrong. I was amazed at how far off it was in all directions. Repairs that others had made that were not even close (and it still flew). I would not repair any piece again I would just replace the whole part. Even without a jig it was not that hard. I used 4 bottle jacks under the four corners of the cockpit. Leveled that up and went from there. I have a transit level so it was easy to take measurements from anywhere. Get everything tacked up then just rotate it around and weld up the joints. I could not have done it without the plans though.

Dan
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Post by N3840E »

Nice repair and it saves one more Aeronca fuselage from heading for the boneyard.
N3840E
Kevin Nugent
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Post by DMichaels »

Fuselage painted or rather primed.

I want to paint any member that is seen on the interior I can figure out the front ones. What ones are visible other than the ones through the back windows?

We are also looking at a solid front window rather than a sliding one. Installing one of those little window scoops maybe two front and back.

This plane was all ripped apart when I got it and I have no other Champ to look at.

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Dan
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Post by Paul Agaliotis »

Dan,
Paint around all of the lugs on the floor for the seat and in the stick area. Also a few of the gear attach clusters can be seen through the floorboard edges.
Paul
Mailing Adress : Paul Agaliotis 2060 E. San Martin, San Martin,Calif. 95046
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Post by DMichaels »

Is there a suppy house for the Woodberry gromets for the formers? I have looked high and low.

Dan
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