One main factor is temperature tolerance.
For example AeroPoxy has nearly 200F tolerance
before it gets soft. For a boat, high temperature is not
critical. But for a plane, the built up heat inside
can result in structural weakness.

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Paul Lee, SQ2000 canard project: www.abri.com/sq2000

ET wrote in message .. .
.....
I would be curious to know what is special about "airplane" epoxy vs
West system or East system etc... or is that another on of those things
that they make for airplanes and triple the price??