First flight of the G-IV was in September 1985 and it received FAA certification in April 1987. The change of powerplant from the G-III's Rolls-Royce Spey to the newer Rolls-Royce Tay Mk 611-8 allowed the G-IV an improvement in fuel consumption of approximately 15% over the G-III. Other improvements included a 4-ft. fuselage stretch, a "brake-by-wire" anti-skid system developed by Goodyear Aerospace, and a six-screen EFIS. The G-IV also features a simplified fuel system comprised of a single tank per wing rather than the pairs of tanks in each wing of the G-III. By 1993, when production of the follow-on G-IVSP variant began, 213 of the original G-IVs had been delivered.
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The Gulfstream G IV has a range of 3,797 nautical miles. Type in your city or airport identifier for a visual representation of the NBAA IFR Range (NM) for this aircraft.