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Earlier, "David" wrote:
Thanks Bob just what I needed. So what is the difference from Hysol and 3M 2216. Sorry, I couldn't tell you from experience. I've never experimented with the different adhesives available, I just used what the plans said to use. And these days the things I'm developing are more along the lines of conventional composites, without metal-to-metal bonding. Looking at this .pdf data sheet: http://multimedia.mmm.com/mws/mediaw...DTTS591111 b- The strength values look to be on the same order as EA9430, except the peel which is a little less than half. It shows the same steep slope in high temperature strength. It may have other nice properties that don't show up clearly on the data sheet. I do know that Dick Schreder abandoned the Scotch-Weld epoxy line in about 1971 when he discovered that it wasn't as moisture-resistant as their specs said. I believe that the impetus was when the HP-16 sailplane he'd built for the national contest unzipped on the ground because of the ballast water softening the glue that held on the inboard wing skin. And that was the national contest he'd arranged to be held in his hometown of Bryan, Ohio. He wasn't any too happy about that. That's all described in "10,000 Feet And Climbing," the biography of Dick written by his daughter Karen Barbera. But anyhow, that episode was decades ago; the formulations have undoubtably changed many times in the intervening years. These days it might be a lot better. Or maybe not; but I'm not going to be the one to experiment with it. Thanks, and best regards to all Bob K. http://www.hpaircraft.com |
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