Tuesday, October 5, 2010

Fabric Clips on RH Wing Ribs

I realized I never showed any pictures of fixing the hole spacing for the rib clips. I worried a lot about clips being loose but the real problem was all the clips which were added after the plane left the factory. The hols were to fare apart to get the clips to stay in. By measuring the hole edge to edge distance the bad holes were all found to be greater than 1.245" - 1.265" tolerance. It takes a little care to get just the tips of the calipers in the holes. . Next the clip edge of the holes are each lightly filed with a rat tail file and then remeasured, etc. It sounds tedious but you quickly get a feel for it and I never over did any of them. All the factor hole fit the clips fine as is.
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The clips are each hooked in one hole and popped in the next. When the hole spacing is correct they snap in and hold very well.
There are 139 on the top side and 68 on the bottom. Except for fixing some else's poor hole drilling this is really fast compared to rib stitching.
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Once the clips are all on you need to apply 4 coats of Poly Brush to the reinforcing tapes. This fills them so they don't suck the Poly Brush out of the surfaced tapes. I find a cheap 1" brush with the bristles cut off to 1/2" long works great. It hold enough liquid to do about 8" on the first coat and about 24" after that. It just covers the tape with no mess on the fabric and is real easy to control.

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