First flight of a NOTAR equipped helicopter
Thursday, December 17, 1981
The aircraft was a modified Hughes OH-6. The pilot was Hughes Helicopters Test Pilot Chuck Hench.
The United States Patent Office (USPTO) holds the original patent.
Note: The attached image only shows an aircraft of the type not the actual NOTAR equipped aircraft.
Source: Helicopter Flies without Tail Rotor, Flight International, 16 January 1982