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Gulfstream GIII

1979 – 1987

Key Facts

  • The Gulfstream GIII is a Large jet manufactured by Gulfstream between 1979 and 1987.
  • The Gulfstream GIII is powered by two Rolls-Royce SPEY 511-8 engines, resulting in an hourly fuel burn of 568 Gallons per Hour.
  • Capable of cruising at up to 478 knots, the Gulfstream GIII can fly non-stop for up to 3750 nautical miles.
  • The aircraft can carry up to 19 passengers.
  • The Gulfstream GIII has an estimated hourly charter price of $5500, with a new list price of $16 million at the time of manufacture.

Overview & History

An improved version of the Gulfstream GII, the Gulfstream GIII provides a greater wingspan than the GII, new drag-reducing winglets, increased range, a redesigned nose, and a longer cabin.

Servicing 13 passengers, the G-III’s cabin stretches well over 40 feet long and offers a full lavatory.

In 1967, The Grumman Gulfstream GII was introduced as the first transcontinental-range business jet with a true stand-up cabin.

A redesign was announced in 1976, but the project was canceled in May of 1977.

However, in 1978, the GIII was announced, featuring upgrades such as a fuselage stretch, a new wing design, and a wraparound windshield.

Gulfstream GIII Performance

The GIII comes equipped with two Rolls-Royce Spey Mk 511-8 turbofan engines. Each engine is rated for 11,400 pounds of thrust and features an inspection interval of 8,000 hours. The GIII requires 5,100 feet of runway to take off at sea level on a standard day.

This takeoff distance increases to 7,175 feet of runway at an airport altitude of 5,000 feet and a temperature of 25 degrees Celsius.

With four passengers, the GIII needs only 2,600 feet of runway to land. The GGIII features a maximum certificated altitude of 45,000 feet and a range of 4,000 nautical miles at .84 Mach with eight passengers on board.

In a high-speed cruise configuration, the GIII is capable of maintaining an airspeed of 488 knots at an altitude of 39,000 feet with a fuel flow of 4,016 gallons per hour. For a flight to a further destination, the GIII is capable of maintaining an airspeed of 442 knots at an altitude of 45,000 feet with a fuel flow of 2,712 gallons per hour in a long-range cruise configuration.

Gulfstream GIII Interior

The cabin of the GIII measures 41.3 feet in length, reaches 6.1 feet in height, and stretches 7.3 feet in width, allowing for a total cabin volume of 1,502 cubic feet.

The cabin of the GIII is usually set in a corporate layout, capable of accommodating eight to twelve passengers in club combination arrangements; however, as many as nineteen passengers can be accommodated.

Amenities incorporated in the GIII include a deluxe refreshment center with a coffee maker and refrigerator and a full-sized lavatory.

With the new, improved wing design, the GIII features a significant reduction in fuel burn which, when combined with the increased fuel capacity, allows for a vast increase in range without adding wingtip tanks.

With a maximum pressure differential of 9.5, the GIII is capable of maintaining a sea-level cabin at an altitude of 22,000 feet.


A typical avionics installation for the GIII is the Rockwell Collins Pro Line 4 and may include systems such as dual Honeywell laser INS, a four-tube electronic flight instrument system (EFIS), dual TDR 94 transponders, the Sperry SPZ 800 flight director system, triple Collins VHF 20 comms, dual Collins VIR 31 navs, a Sperry Primus 800 color weather radar, dual ADF, Global GNS 1000 FMS, and a Collins HF 628 high-frequency comm.

An upgrade to the Pro-Line 4, the Pro-Line 21, includes a number of additional systems and products that offer opportunities to improve the operational efficiency of the aircraft.

Gulfstream GIII Charter Cost

The cost to charter this jet starts at around $5,650 an hour.

Hourly charter rates do not include all taxes, fuel, and other fees.

Charter costs will vary based on year of make/model, schedule, routing, passenger & baggage totals, and other factor

Purchase Price

The acquisition cost for this jet typically ranges from $15 million.

The price of a jet depends on the production year; it can also go above the given range if the production is new.

It will cost buyers around $3 million per year which includes fuel, crew members, and maintenance, etc.

The price of a pre-owned example can be within $1-3million.






Range: 3,750 nm Number of Passengers: 19 Baggage Capacity: 157 Cubic Feet
Cruise Speed: 478 knots Cabin Pressure: 9.5 PSI Max Take-Off Weight: 68,200 lbs
Ceiling: 45,000 feet Cabin Altitude: 6,400 feet Max Landing Weight: 58,500 lbs
Take-Off Distance: 5,100 feet Production Start: 1979
Landing Distance: 2,600 feet Production End: 1987




Exterior Length: 83.1 feet Engine Manufacturer: Rolls-Royce
Exterior Height: 24 feet Engine Model: SPEY 511-8
Wingspan: 77 feet Fuel Burn: 568 Gallons per Hour
Interior Length: 41.2 feet
Interior Width: 7 feet
Interior Height: 6 feet
Interior/Exterior Ratio: 50%


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