A decision to use the 50hp German made rotary engines for the EzyCopter has been a major one and one made only after testing several other excellent engines, including Hirth, Rotax, Radial, and the Yamaha. Our choice of the German RX50, is believed best suited for our overall requirements at this stage. Accordingly, Yoshine has ordered and now the RX50 engines are being produced for the EzyCopter.