GULFSTREAM G450
The Gulfstream G450 is a significantly improved, larger version of the earlier G-II and G-III. First delivered in 1987 the G-IV is recognizable by its low/swept wing with winglets, its swept T-tail with swept horizontal stabilizer, and its two rear fuselage mounted engines. More room was available because of the lengthened fuselage, so now each side has 6 large circular windows. Piloted by a crew of 2, the G450 can seat up to 13 passengers in executively configured comfort and travel at speeds up to 505 knots per hour, with a range of 4990 nautical miles.

The improved Gulfstream IV-SP (SP = Special Performance), with higher payload and landing weights and improved payload range performance, replaced the IV from September 1992. Many versions of the GIV, GIV-SP, G400 and G450 actually have overlapping features.