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SB #7 Structural tests?
SB #7 refers to structural tests the manufacturer was to perform to ascertain whether the strength of epoxy using microballoons would be comparable to that using cotton flox. I can't find any further reference to these tests and wonder whether they showed acceptable strength for wing applications using microballoon thickened epoxy.
questions...
1. Is there a visual way to tell if the epoxy used in wing construction was thickened with flox or microballoons?
2. Is there any reference to the test results?
3. Is a wing made with microballon thickened epoxy acceptable?
thanks!
jon
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