You can read the safety sanctions as outlined by IMAA at their website. It does not say that CA hinges are prohibited, instead in says that hinges "should" be made specifically for large scale use. A large CA hinge fills that requirement. As for the hinge breaking down under UV light, I would think you would have to bake them under a UV commercial sun light! Some of this testing "ca-ca" is biased to promote one type of product over another. As for flutter, a CA hinge does not induce nor contribute to flutter. Hinge installation, control surface gap, servo horn selection, using servos not rated for the intended flight surface, contribute to flutter.

Tests have also shown that all brands of epoxy breakdown over time and will loosen, does this mean that the Robart hinges and Klett hinges will come loose and produce flutter? In my opinion,CA hinges are safer, when properly installed, than any other hinge. Robart hinge points will over time weaken at the hinge pin.

One final thought, if you build it right it will last. Improperly installed equipment, regardless of the quality, will fail!

Happy Flying!

LOOPMAN