Bell X-22
Aircraft model
The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans. Takeoff was to selectively occur either with the propellers tilted vertically upwards, or on a short runway with the nacelles tilted forward at approximately 45°. Wikipedia
First flight: March 17, 1966
Top speed: 254 mph
Engine type: General Electric T58
Wingspan: 39′ 0″
Manufacturers: Bell Aircraft and Bell Textron