The Gulfstream IV SP version has 1,400 pounds more take off weight, 7,500 pounds more landing weight, a redesigned fuselage that allows one inch more headroom, and some minor system changes. The Gulfstream IV was introduced in 1985 and the biggest differences from the GIII are FAR 36 Stage 3 compliant Rolls Royce Tay 611-8 engine, a four foot longer cabin, and 340 nautical miles extra range.
- Aircraft Library
- 1979 - 1988
The Westwind started out as the Aero Commander 1121 Jet Commander. When Rockwell (owner of Aero Commander) acquired North American Aviation (owner of Sabreliner) in





