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Old 12-07-2011, 12:06 PM
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opjose
 
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Default RE: Nitro Planes CMP P28 Piper Arrow ARF

BTW: another thing I would recommend doing....

The cowl is pretty thin IMHO...

I used some light fiberglass cloth to re-inforce it.

I cut the cloth into 1-2" strips.

I prepared the work area by putting down wax paper ( epoxy doesn't stick to wax paper when it dries! ).

I mixed up 30 minute epoxy and added and mixed in an addition 40% by volume isoprophyl alcohol to thin it out.

I lightly coated the inside of the cowl with the mixture and laid the strips on the inside.

I then again applied the thin mix until the strips seemed to disappear on the cowl. It is OK if the strips cover the openings... you'll remove the excess later. The strips should also extend up to or very slightly beyond the edges of the cowl.

I carefully removed any excess epoxy with pure alcohol and a clean towel.

I let this dry overnight.

Once it was hard and dry I used a small Dremel sanding drum to remove any excess fiberglass from the edges and openings.

The cowl becomes much harder this way and far less prone to cracking during a mishap.

BTW: I did the same thing for the floor of the canopy area, but in retrospect you don't really need it there and it can interfer with the removal of the canopy to get at the batteries.