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Long term integrety of Epoxy

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ToddK

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On another thread about glue for wood aircraft construction, several posted comments about epoxy softening at high temperatures, and the need for composite aircraft to be painted white. The implication being that epoxy is inferior to another glue.

Clearly wood and fabric aircraft are different in some respects to composite foam/fiberglass/epoxy structures.

Hughes FPL-16A and T-88 has been around for decades, and have been used on wood aircraft that have been painted all kinds of colors. Has anyone ever heard of an epoxy failure on a wood aircraft due to heat? I haven’t.

It seems to be that concerns about epoxy are nonsense, and there are plenty of flying aircraft (including fast, and aerobatic aircraft) to prove it.
 
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