page 80 kp june Kit Planes
5,332 hp (3,976 kW) Allison YT40-A-6 turboprop engine
driving three-bladed contra-rotating propellers.
Full VTOL testing at Edwards AFB was delayed pending the
availability of the 7,100 shp Allison T54, which
never materialized.
mpty weight: 11,599
lb (5,261 kg)
No turbo prop will beat a wankel on power to weight ratio.
http://www.rotaryeng.net/VTOL.html
Paul Lamar