Gulfstream I G-159)

The Grumman Gulfstream I (company designation G-159) is a twin-turboprop business aircraft. It first flew on August 14, 1958.

Grumman: G-159 Gulfstream I

Role Business aircraft
National origin United States
Manufacturer Grumman
First flight August 14, 1958
Produced 1959–1969
Number built 200


Gulfstream I G-159)

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Gulfstream I G-159)

The Grumman Gulfstream I (company designation G-159) is a twin-turboprop business aircraft. It first flew on August 14, 1958.
After first rejecting an idea to develop the Grumman Widgeon as an executive transport, the company studied producing an executive transport based on a turbine-powered variant of the naval utility transport Grumman TF-1 Trader. The company had already determined that any new aircraft would have to be turboprop-powered and the Rolls-Royce Dart engine was chosen. Further studies showed that the Trader-based design would not sell and they needed an all-new design with a low-wing and room to stand up in the cabin. In June 1957 the design of G-159 was finalised and Grumman started selling slots on the production line at $10,000 each. The initial customers worked with Grumman on the detailed design and avionics fit.


The G-159 was given the name Gulfstream and on 14 August 1958 the first aircraft, registered N701G, took off from Bethpage, New York on its maiden flight. By 2 May 1959 the aircraft was awarded a type certificate by the Federal Aviation Administration (FAA).

The Gulfstream I is a low-wing cantilever monoplane with a semi-monocoque aluminium alloy fuselage structure. The aircraft is powered by two Rolls-Royce Dart turboprops with Rotol four-bladed constant speed propellers. The Gulfstream I has a retractable tricycle landing gear, with twin wheels on the two main units and the nose gear. The cabin is designed to take up to twenty-four passengers in a high-density arrangement or only eight in an executive layout, although ten to twelve was more usual. The aircraft has a hydraulically operated airstair in the forward cabin for entry and exit.


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Grumman G-159 Gulfstream I (1958)

Most of the 200 Gulfstream I propjets were operated by corporate customers, with a smaller number operated by regional or commuter airlines as well as by government agencies and the military. NASA, the U.S. space agency, flew the Gulfstream I as a passenger transport aircraft and operated seven G-Is. Throughout the 1970s and mid-80s the Ford Motor Company operated a G-1 for their executives in Brazil. The Walt Disney Company operated Gulfstream S.N. 121 with the factory assigned tail number N732G from December of 1963 to October 4, 1967, when it was changed to N234MM.


Crew: 2

Capacity: 10–24 passengers / 4,270 lb (1,937 kg) 

Length: 63 ft 9 in (19.43 m)

Wingspan: 78 ft 6 in (23.93 m)

Height: 22 ft 9 in (6.93 m)

Empty weight: 21,900 lb (9,934 kg) equipped

Max takeoff weight: 35,100 lb (15,921 kg)

Powerplant: 2 × Rolls-Royce Dart Mk.529 or Mk.529-8E turboprop, 2,190 shp (1,630 kW) each equivalent

Cruise speed: 348 mph (560 km/h, 302 kn) maximum cruise, at 25,000 ft (7,600 m) at MTOW

Approach speed; 128 mph (111 kn; 206 km/h)

Range: 2,540 mi (4,090 km, 2,210 nmi) with max. fuel, 2,740 lb (1,243 kg) payload, 45 minutes hold and 200 mi (174 nmi; 322 km) diversion

Service ceiling: 33,600 ft (10,200 m)

Rate of climb: 1,900 ft/min (9.7 m/s)

Take-off run: 2,550 ft (777 m)

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Seven U.S. Navy squadrons flew the F11F-1: VF-21 and VF-33 in the Atlantic Fleet and VA-156 (redesignated VF-111 in January 1959), VF-24 (redesignated VF-211 in March 1959), VF-51, VF-121, and VF-191 in the Pacific Fleet.

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