Complex sentence: Of the ASH26s sold, over 90% are the self-launching version, the ASH 26E; the engine being a liquid cooled Diamond AE50R Wankel rotary.
Split into simpler sentences: Of the ASH26s sold, over 90% are the self-launching version, the ASH 26E. The engine fitted is a liquid cooled Diamond AE50R Wankel rotary.