1/72 Lippisch "AERODYNE"
This project was designed by Alexander Lippisch during 1950ies in the U.S.A.
The VTOL aircraft was to be powered by two tandem mounted piston engines with
tractor and pusher propellers. The air flow was to be deflected to achieve vertical
thrust, while small portion of compressed air passed to the tail exhausts for
horizontal and directional control. The piloted aircraft project was never built,
however the "Aerodyne" pilotless testbed was built and flown by Dornier, Germany
in 1974.