Grumman Gulfstream I

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

Design and development

Gulfstream I

Gulfstream I

The United States military version for this plane is the C-4 Academe. The TC-4 is a version with added instruments and navigation. It was used by US Navy for bombadier/navigator training for the A-6 Intruder. A VC-4A variant was flown by the United States Coast Guard as an executive transport until the early 1980s. It was later used as a logistics and long-range command and control aircraft until 2001.

A 38-passenger stretched version, the G-159C, was developed by Gulfstream. Five were delivered from November 1980. Air North (Plattsburgh NY) was one among the few airlines to use this version, before its acquisition by Brockway Glass.

Operational history

In August 2006, a total of 44 Grumman Gulfstream I aircraft remain in service. The major operator is Phoenix Air in the United States with 13 aircraft. Some 19 other airlines also operate the type.


G-159 Gulfstream I

Twin-engined executive, corporate transport aircraft with accommodation for up to 14 passengers, powered by two 2,210-ehp (1648-kW) Rolls-Royce Dart RDa.7/2 Mk 529-8X turboprop engines. 200 built.

G-159C Gulfstream I-C

Stretched commuter airline version. Five Is were converted into Gulfstream I-Cs, by having the fuselage lengthened by 10ft 8in (3.25m) to provide seating for up to 32 passengers.

C-4 Academe

TC-4C Academe

Bombardier, navigator trainer trainer for the US Navy. Nine built.


VIP transport version for the US Coast Guard. One built.


Data from Jane’s All The World’s Aircraft 1965-66

General characteristics

  • Crew: 2
  • Capacity: 10–24 passengers
  • Length: 63 ft 9 in (19.43 m)
  • Wingspan: 78 ft 6 in (23.93 m)
  • Height: 22 ft 9 in (6.93 m)
  • Wing area: 610.3 sq ft (56.70 m2)
  • Empty weight: 21,900 lb (9,934 kg)
  • Max takeoff weight: 35,100 lb (15,921 kg)
  • Powerplant: 2 × Rolls-Royce Dart 529 turboprop, 2,190 shp (1,630 kW) each


  • Cruise speed: 348 mph (302 kn; 560 km/h) (max cruise, at 25,000 ft (7,625 m)
  • Range: 2,540 mi (2,207 nmi; 4,088 km)
  • Service ceiling: 33,600 ft (10,241 m)
  • Rate of climb: 1,900 ft/min (9.7 m/s)