Gulfstream G400 / G500 / G600
Aircraft Overview: Gulfstream G400 / G500 / G600
Gulstream G400 / G500 / G600
Gulfstream Aerospace Corp.’s G400, G500 and G600 are twin-engine business jets produced by the Savannah, Georgia-based manufacturer which are commercial designations of the company’s GVII type.
Announced on Oct. 14, 2014, both the G500 and G600 are clean-sheet designs, with the former version of the GVII type (GVII-G500) making its first flight on May 18, 2015, from Savannah-Hilton Head International Airport.
Subsequently, the first flight of a G600 (GVII-G600) took place on Dec. 17, 2016, a flight that also originated from Savannah. Those airframes were certified in the order in which they made their first flights, with the G500 receiving FAA certification on July 20, 2018, ahead of the G600’s receipt of FAA approval on June 28, 2019.
Following the certification of the G500 and G600, the smallest GVII-based airframe—the G400—was announced by Gulfstream on Oct. 4, 2021, with that airplane’s first flight occurring on Aug. 15, 2024.
Cabin
According to the FAA type certificate data sheet (TCDS) that includes the GVII-G500 and GVII-G600, both airframes are certified to carry up to 19 passengers, in addition to the two required pilots.
However, Gulfstream notes that when the cabin is configured for sleeping accommodations, the respective passenger capacities of the G500 and G600 are reduced to 8 and 10.
Also common to those versions of the GVII are the finished cabin height (6 ft. 2 in.), finished cabin width (7 ft. 7 in.) and cabin altitude while flying at 41,000 ft. (3,255 ft.), specifications that are shared by the G400.
Furthermore, the G500’s cabin has a length (“excluding baggage”) of 41 ft. 6 in. and a cabin volume of 1,715 ft.3, specifications that the G600 expands to 45 ft. 2 in. and 1,884 ft.3
Although it has yet to be certified, the G400 is expected to be able to accommodate as many as 12 passengers or up to five passengers with sleeping accommodations.
Beyond being limited to a lower passenger capacity than the G500 and G600, the G400’s cabin length (36 ft. 4 in.) and cabin volume (1,441 ft.3) are also reduced.
Avionics
Pilots operate all GVII commercial designations by utilizing the Symmetry Flight Deck, with the G500 and G600 noted as having features such as active control sidesticks and 10 touch-screen displays, as well as an enhanced flight vision system (EFVS) and synthetic vision – primary flight display.
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Variants
Powering all three GVII commercial designations are variants of Pratt & Whitney Canada’s PW800 engine series, with the G500’s PW814GA engines each rated to a takeoff thrust of 15,144 lb.
The G600’s PW815GA engines increase the rated takeoff thrust to 15,680 lb., while the G400’s PW812GA engines reduce that limitation to 13,496 lb.
Similar to other specifications for the GVII type, the maximum takeoff weights (MTOW) also increase from the G400 (69,850 lb.) to the G600 (94,600 lb.), with the G500’s MTOW (79,600 lb.) being in between the weight limitations of the other GVII-based airplanes.
Mission and Performance
The operating limitations of the GVII-G500 and GVII-G600 include a maximum operating Mach number (MMO) of 0.925 Mach and a maximum operating altitude of 51,000 ft.
In addition to the certified maximum operating altitude, the initial cruise altitude of the G400 and G600 is 41,000 ft., an altitude that the G500 increases to 43,000 ft.
When carrying eight passengers, three (G400/G500) or four crew (G600) and National Business Aviation Association (NBAA) instrument flight rules (IFR) reserves—as well as when flying at the airframe’s long-range cruise speed of 0.85 Mach—the theoretical maximum ranges of the G400, G500 and G600 are 4,200 nm, 5,300 nm and 6,600 nm, respectively.
Although it has less range capability and a lower MMO of 0.90 Mach, the 5,000-ft. takeoff distance of the G400—which assumes International Standard Atmosphere (ISA) conditions, MTOW and sea-level altitude—is less than the comparable distances for the G500 (5,300 ft.) and G600 (5,700 ft.) based on the same criteria.
Furthermore, although the G500 and G600 have a high-speed cruise speed of 0.90 Mach, that speed for the G400 is 0.88 Mach.
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