The Gulfstream IV is a significantly improved, larger, longer ranging and advanced development of the earlier II and III. The most significant improvement with the G-IV over the earlier Gulfstream models are the Rolls-Royce Tay turbofans, which bring significant fuel burn and noise emission improvements despite their higher thrust output than the II and III's Speys (the IV continues a Gulfstream and Rolls-Royce association that dates back to the original Dart powered Gulfstream I). Other changes include a stretched fuselage and aerodynamically and structurally improved wing with 30% fewer parts, greater fuel capacity and range, increased span tailplane and an advanced EFIS avionics suite with six colour CRT displays.
Design work on the IV began in early 1983, with the first of four production prototypes making the type's first flight on September 19 1985. FAA certification was awarded on April 22 1987. 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. A third development is the special mission SRA-4. Designed primarily for military roles (such as maritime patrol and electronic surveillance, depending on equipment fit)
Recently a IV-SP set new world speed and distance records on a routine business flight from Tokyo to Alberquerque in the USA in March 1993.
Gulfstream aircraft are world-renowned for sophistication, comfort, productivity and reliability. Elegantly functional, the Gulfstream IV cabin offers the kind of space and amenities needed to travel, work or relax. Seating areas can be configured with fully reclining chairs or divans. Three temperature comfort zones, 100 percent fresh air, 12 signature panoramic oval windows showering the cabin with light, and a maximum cabin altitude of just 6,000 feet create an inviting atmosphere that delivers you to your destination feeling refreshed.