National Aeronca Association Bulletin Board

I have another request for clear drawings. My 7AC was damaged when part of the hangar landed on top of it after a tornado blew my hangar apart some years ago. The wood structure above the cabin was shattered. The demensions on the DVD drawings are hard to read. Does anyone have a clear copy of the drawing 3-525?
Thank you again! Bob K. "planemech"

Bob,

Do not have a copy of that blueprint. Might try Todd or hopefully others can help.

Joe

Bob,
I have a set of upper wood frames (7AC) that can be used for a pattern. I'm on the road right now but should be home in a day or two.
MikeB

Thanks MikeB, is it assembled or in pieces? If in pieces, I would love to use it as a pattern. I will cover all shipping here and back. Thanks!
My email is: bkaba@earthlink.net

Bob,
Just got back from Texas this afternoon. I'll see if I can dig the pieces out tomorrow. It's all apart so it should be easy to ship.
Mike

Mike, my email is: bkaba@earthlink.net. Contact me and I'll give you my mailing address. Thanks again, Bob

Bob,
the drawing you referenced is the assembly drawing of the top pieces. To me that's of limited value. The drawings that you need are of the individual pieces.

5-153 Rib (side - Need 2)
4-568 Support -Front
4-569 Support - Center
4-570 Support - Rear

I'll send them to you direct along with 3-525 (Assy Drawing). It'll take a few e-mails.

Of course if you can lay your hands on some for patterns - I'd go for it. The drawings will just make any AI happier.

If you need anything else, let us know.

Craig

Here is a pic of mine. If you would like more pics of areas of concern let me know.

Del
N84029

Thanks Craig for the offering. My email is: bkaba AT earthlink DOT net (replace the AT with @, and DOT with a .) ,Mike from Wisconsin is sending me the pieces to a top frame to use as a pattern. The drawings will help with the demensions. I like the way you have made the 5-153 members full bodied, less chance for compression of the unit. Thanks again Craig. I will be looking forward to the drawings.
Bob K. "planemech"

I've made the side ribs "Full Bodied" on a previous restoration. I also had a seasoned mechanic tell me to pre-hang the wings before you cut the top contour. Then you customize the top airfoil line to match your wing. The gap seals will really fit nicely.

This goes for the 11AC as well.

If you use the stock side ribs, with the underside cut out, be careful how much you shrink the fabric in that area. Stitts can easily suck that down. Leave extra fabric along the bottom (top of door frame). So that if it pulls down too much, you can peal up the fabric and release the tension. Then reglue the edge.

And before anyone goes crazy about all the legal trash. I did this as making a part for myself that was as good or better than the original. My AI excepted the part and the aircraft passed a conformity inspection for a re-issue of an air worthiness certificate, by a rep of the FAA.

Craig