High Quality Content by WIKIPEDIA articles! The ASH 31 is a single seat Open Class glider which can also be flown in the 18 metre class configuration. It was announced at the end of 2008 by Alexander Schleicher. The glider has been developed as a replacement for the ASH 26. The self-launching Mi version is powered by a 41 kW (56 hp) rotary Diamond Wankel engine.