THE DOAK 16 IS A TESTAMENT TO WHAT
TWO 48 INCH DUCTED FANS CAN DO
CLICK ON THE IMAGE BELOW TO VIEW A SHORT VIDEO OF THE DOAK 16
The Doak 16 VZ-4 was built in 1957. It’s first flight was on Februrary 25, 1958. It carried two people, was 32 ft. long, with a 16 ft. wing span and a gross weight is 3,200 lb. The Doak was propelled by two 8-blade, 48 inch diameter propellers inside tilting ducts and powered by a single 860 hp Lycoming engine. Transition from hover to 200 knots took less than 20 seconds. The Doak 16 completed over 50 hours of flight testing and proved the feasibility of vertical flight employing small ducted fans.