This was the first flight of the Rotor Systems Research Aircraft (RSRA) / Sikorsky S-72 in it's full compound configuration (main rotor, wing and auxiliary propulsion); it was flown to Moffett Field.

The pilots were Sikorsky test pilots Charles Reine and Gerald Stoffer.

Source: "Fifty Years of Sikorsky High Speed Concepts", Art W. Linden, Paper presented at the American Helicopter Society 64th Annual Forum, Montreal, Canada, Apr 29 Apr-May 1, 2008