28 Jun '15, 1pm

XR2どうなのかな

onventional carbon fiber construction are unnecessary. We've used vinylester resin, which is about half the price and nearly as strong as conventional epoxy. The main advantage of vinylester is that it's catalyzed and applied just like polyester resin, which makes it much easier to use for the do-it-yourselfer. Lay-ups are applied to the urethane foam core, and the foam remains as an integral part of the frame. So the foam serves as a mold and it adds significantly to the strength of the frame. Imagine bending a hollow metal tube to the point where it kinks and collapses. The same failure point occurs with any hollow structure, regardless of the material. But with a foam core, the walls of the structure (the carbon fiber skin) are held in place so they cannot kink and collapse. Even though the foam has little strength of its own, it plays an important role in the overall s...

Full article: http://rqriley.com/xr2.htm

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