They're a loooong way away from a working Mehve, although I admire the designers for their dedication. For one thing, the Mehve was made of ceramics, where OpenSky is made mostly of high-tech composites. Mehve was capable of V/STOL, while OpenSky is designed to be towed (I think). Several times in the manga and anime, the Mehve was flying upside-down, which I can't imagine happening in real life. I'm interested in whether they'll end up need computers in it to stabilize it during flight. Flying wing designs can be a bit tricky.