SAC of MMMSClub
Well-Known Member
- Joined
- Dec 27, 2010
- Messages
- 852
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I did just that ,even though the ply cores were warped ,after using 30 min. epoxy to laminate the skins I placed sheets of wax paper between the fin sets, placed between sheets of 1/4" thick glass plate and placed two bags of lead shot on top (50 pounds total) and the fins came out perfect.
I was very sure however ,that the Balsa skins did not shift off possition from the ply cores (as i cut the Balsa skins the same shape & size as the cores ,leaving a 1/16" all around) when I was stacking them together and placing the weight on top.
A little sanding on all edges(I also gave the leading edges a bit of a bevel) and a coat of 20 min finish epoxy and Bob`s your uncle.
Paul T
The whole skins shifting thing is what made me just lay it on the whole sheet of balsa and trim down to the core. I could see the load causing the cut to shape as the directions say ending up off the mark and then what do you do? cut and paste, bondo, epoxy with micro baboon???
I do like the .25 or .50 sheet of glass idea!!! heavy as all get out on its own.