Jonker 18 meter sailplane
I know that my PIK-20 was actually built in an autoclave. After 30
years, I still have no spar bump or dip. The unfortunate piece of that
is that the molds warped and the wings are a touch too thick. I believe
Sparrowhawks are cured at above 300 deg. f. if I read the info
correctly.
Jack Womack
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