FS2002/FS2004 Grumman G-22 Gulfhawk II.
One of the most exciting aerobatic aircraft of the 1930s and 1940s was the Grumman Gulfhawk II, built by Grumman Aircraft Engineering Corporation in Bethpage, Long Island, for the Gulf Oil Companies.
This sturdy civilian biplane, powered by a Wright Cyclone R-1820-GI 1,000 hp engine and a three-blade Hamilton Standard propeller, nearly matched the F3F standard Navy fighter that was operational at that time.
Modifications were made in the construction to withstand the high-load factors encountered during aerobatics and the aircraft was equipped for inverted flying for periods of up to half an hour.
by Kazunori Ito.