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#7
January 29th 20, 08:45 PM
posted to rec.aviation.soaring
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PU finish in wave flying
On Wednesday, January 29, 2020 at 1:50:37 PM UTC-5, Eric wrote:
PU is also used in the automotive industry. Metal shrinks/expands more under temperature changes than our glasfiber wings do. Is it too easy to say that if polyurethane works on cars than it certainly works on gliders? I don't intent to do the paintjob myself, but I'll go to a professional EASA approved workshop, and they use T35 as groundlayer. Would that affect the crack resistance (against temp changes) in a negative way? AU or PU is more flexible than "gelcoat" and thus less prone to crack. UH 
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