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my mod C

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Posted

Well due to the new site software, I guess I will start all over with this one.  I picked up a basket case the last week of September 06 and now have it about 90% re-built.  The fuse and right wing are ready to go and the left wing should hopefully be completed by the middle of June.. looking for a test flight date of around the 22nd or 23rd if all goes well.

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Posted

and a few shots of the various stages of the re-build.

The red lines indicate the welds on the two sections of the upper longerons that were bent when the previous owner put her on her back.

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Posted

and some more

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Posted

Engine was rebuild and 0 timed with new crank and the works.  New "C" box with Clutch was added for float flying..

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Posted

Last ones for now.  The metal trailing edge was added and all flaperon hanger rib tails and cap strips were replaced.  The wings are rib stiched for that extra piece of mind when flying though turbulent mountain passes.

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Posted

And now a little over 2 years later, she is back inthe air and flew GREAT.

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Posted

:beerchug:  Congrats BRO its been a long one for you . Now its time to play with her and fly the tires off. catch ya on the flyby .

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Posted

The only pics I have with me to show the fuel line routing.  Never had an issue with tank not venting.

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Posted

I have just started the process of recovering my Avid C HH and am looking at your photos of the wing prep. Can you tell me what the gray substance (Paint/epoxy/??) is on the rib caps and the sides of the ribs with the flaperon hangers? I pulled the old covering off and the rib caps on mine are not treated with anything except glue. I do plan to rib stitch which was not done on the original covering. Also I have had to replace two of the flaperon hanger ribs with new one and wonder what I need to do to them prior to covering. Appreciate your advice, Cheers, Mike

Last ones for now.  The metal trailing edge was added and all flaperon hanger rib tails and cap strips were replaced.  The wings are rib stiched for that extra piece of mind when flying though turbulent mountain passes.

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Posted

I have just started the process of recovering my Avid C HH and am looking at your photos of the wing prep. Can you tell me what the gray substance (Paint/epoxy/??) is on the rib caps and the sides of the ribs with the flaperon hangers? I pulled the old covering off and the rib caps on mine are not treated with anything except glue. I do plan to rib stitch which was not done on the original covering. Also I have had to replace two of the flaperon hanger ribs with new one and wonder what I need to do to them prior to covering. Appreciate your advice, Cheers, Mike

I had some epoxy primer left over from painting all the steel parts inside the wing so I slapped it on all the new wood.

Replacing the rib tails was pretty easy! Just use a heat gun to soften up the glue, and a putty knife to separate the cap strip from the rib. The first wing I did, I used the measurements out of the book and they did not line up perfectly with the flaperon when I went to hand it. The second wing, I clamped the flaperon onto the tails, then using a 12' aluminum "I" beam, I lined the cap strips up, then glued them all up at once. The second wing came out perfect.

Do you need to replace the cap strips or just the tails?

You can also use a good spar varnish on all the new wood to seal it up.

:BC:

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Posted (edited)

Thanks for the info. Wondering if spar varnish is compatible with the PolyFiber chemicals? I think I will need to use an epoxy on the wood so as to hold up to the PolyTak? The previous covering was the old dope system and I will be using PolyFiber-Stitts process to recover.

Some flying club friends helped me replace the ribs. Had to replace two of the tail ribs. Did so by cutting the cap strip forward of the rear spar and removing the rear part of the damaged ribs & cap strips. Using the short ribs intended for installation at the rear of the fuel tank we trimmed the cap strips so as to butt to the point where the old ones were cut. Then epoxied the tail ribs to the spar and cap strips to the ribs forward of the spar. We used my flaperon to line up the hanger points for accuracy.

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I had some epoxy primer left over from painting all the steel parts inside the wing so I slapped it on all the new wood.

Replacing the rib tails was pretty easy! Just use a heat gun to soften up the glue, and a putty knife to separate the cap strip from the rib. The first wing I did, I used the measurements out of the book and they did not line up perfectly with the flaperon when I went to hand it. The second wing, I clamped the flaperon onto the tails, then using a 12' aluminum "I" beam, I lined the cap strips up, then glued them all up at once. The second wing came out perfect.

Do you need to replace the cap strips or just the tails?

You can also use a good spar varnish on all the new wood to seal it up.

:BC:

Edited by skysailor

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Posted

Finished up with this part of my project. Some marine penetrating epoxy took care of my concerns regarding the wood components. When I got to the metal tubing components (new tubing welded in to repair the tail wheel section) I used some two-part white epoxy primer and just brushed it on...four coats...and after a week of curing it looks factory new.

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