The Heinkel "Wespe" (Wasp) was designed in late 1944 at the Vienna Heinkel works as a VTOL (Vertical Take Off and Landing) interceptor. It was to be used around factory complexes as a "point defense" interceptor. The Wespe was designed around a circular wing, with small wing tips protruding beyond the circular wing at the two lower wing support locations. A single He S 021 turboprop (the turboprop development of the He S 011 jet engine), drove a six-bladed propeller, providing 2000 horsepower plus 750 kp thrust and was fed by an air intake located below the cockpit. The Wespe took off and landed on three landing gear. The pilot sat in a normal seated position in the nose under a large blown canopy. It had two MK 108 30mm cannon mounted in blisters on each side of the cockpit.