Hi Tim,
The fiberglass sheet in place of the plywood shoud be fine. I did some
test panels comparing .047 E-glass sheet with 3/32" plywood over a
typical truss structure and the glass was comparable in shear but peeled
more easily. If the glass was sanded dull where it was epoxied to the
truss it was almost as good in peel as the plywood. If yours does not
peel easily, you're probably good.
A number of airplanes have been built this way. Search the Sport
Aviation archives for Ken Champion's Jupiter J-1, probably late
50s-early 60s. He built his wings with fiberglass sheet over wood ribs.
Chris
On 11/3/2017 1:22 PM, Tim Hoversten via KRnet wrote:
The previous builder had obviously seen Ron Scott's "Ol' Ironsides" airplane
which was based here in WI, or read the articles about it in Sport Aviation, because it
has fiberglass sheet for the sides and bottom instead of aircraft plywood.
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