Grumman Gulfstream II

$21 million twin-jet designed by Grumman Aerospace Corporation.

Grumman G 1159 Gulfstream II SP 1
photo: Tomás Del Coro

The Gulfstream II is a twin turbofan powered business jet has a capable of flying on transcontinental range. Manufactured by Grumman Aerospace Corporation later Gulfstream Aerospace from 1967 to 1980, this business aircraft has a maximum range of 3580 nautical miles and a maximum cruise speed of 420 knots.

Manufacturer:
Grumman
Country:
United States
Manufactured:
1966 to: 1980
ICAO:
GLF2
Price:
US$21 million (1980)

Specifications

Avionics:
Honeywell SPZ-800
Engine:
2x Rolls-Royce Spey
Turbofan
Power:
11,400 pound-force
Max Cruise Speed:
420.1 knots
778 Km/h
Approach Speed (Vref):
Travel range:
3,583 Nautical Miles
6,636 Kilometers
Fuel Economy:
Service Ceiling:
4,500 feet
Rate of Climb:
4350 feet / minute
22.10metre / second
Take Off Distance:
1737.38 metre - 5,700.00 feet
Landing Distance:
1346.32 metre - 4,417.01 feet
Max Take Off Weight:
28,123 Kg
62,000 lbs
Max Landing Weight:
26,535 Kg
58,500 lbs
Max Payload:
2,184 Kg
4,815 lbs
Fuel Tank Capacity:
2,775 gallon
10,504 litre
Baggage Volume:
4.45 m3 / 157 ft3
Seats - Economy / General:
19 seats
Seats - Business Class:
Seats - First Class:
Cabin Height:
1.86 metre - 6.10 feet
Cabin Width:
2.23 metre - 7.32 feet
Cabin Length:
10.33 metre - 33.89 feet
Exterior Length:
24.11 metre - 79.10 feet
Tail height:
Fuselage Diameter:
Wing Span / Rotor Diameter:
20.76 metre - 68.11 feet
Wing Tips:
No Winglets
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Description

Gulfstream II Production and Development

On May 5 1965, the Gulfstream II got a go-ahead for production by Grumman Aerospace with thirty firm orders.

On October 2 1966, the Gulfstream II took its 52-minute maiden flight.

On October 19 1967, the aircraft received its type certification from the Federal Aviation Administration. It was authorized to meet the requirements of public transportation; however, it wasn’t considered cost-effective to operate as an airliner. The Gulfstream II were manufactured as green aircraft, a brand new aircraft from the factory with an incomplete interior and were deployed to a completion center to suit the specialized interior and avionics as what the customers required.

In 1967, a new production plant was built in Savannah, Georgia to assemble the Gulfstream II. In December of the same year, the first Gulfstream II that was built in Savannah took its flight. Production of the aircraft went on in Bethpage, New York until they finished production of forty aircraft.

In March 1976, tip tanks were certified in order to expand the range of the Gulfstream II.

In 1979, aircraft production has ended. There were forty-three aircraft transformed into Gulfstream IIB from 1981 to 1987.

240 out of 256 Gulfstream IIs produced are still in service.

Gulfstream II Design

The Gulfstream II is equipped to fly at a high speed and has a long range capacity without compromising aerodynamic performance.

It has a swept wing with a span of 20.76 meters and a wing area of 75.21 square meters. The initial design of the wing was impacted by consideration of low speed and cruise. The position of the aft-mounted engine was determined after considerable study and repetition of design taking into consideration the standards of structure, aerodynamic and ground clearance. The leading edge radius was customized to prevent detachment of the leading edge. There is also a single-slotted fowler flap of 30% chord that slides backward.

The winglets of the aircraft were supplied by the Aviation Partners Inc., a private corporation that focuses in performance-enhancing winglet system in Seattle.

The Gulfstream II has an external length of 24.11 meters and height of 7.50 meters. It has a cabin dimension of 10.33 meters x 2.23 meters x 1.86 (length, width, height). The aircraft cabin of the Gulfstream II stays as one of the largest cabins in the long-range business class, despite the newer types.

Gulfstream II Avionics

The Gulfstream II was initially designed with the analog communication and navigation radios and vintage electromechanical instrument displays, however various parts have been changed. Common installations comprise of the SPZ-800 flight control system supplied by Honeywell, including the Sperry SP-50G autopilot and dual Honeywell Laser Inertial Navigation System (INS), dual Collins VHF-20A communication radios and VIR-30 radio navigation system, dual Distance Measuring Equipment (DME) for measurement of the distance between the aircraft and ground station, dual transponders that produce responses once it receive a radio-frequency interrogation,  and High Frequency communication systems for trans-oceanic flights.

Gulfstream II Engine and Performance

The aircraft is powered by two Rolls-Royce Spey turbofan engines with a maximum thrust of 11,400 lbf each. With a range of 3,580 nautical miles and maximum cruise speed of 420 knots, it is capable of flying on transatlantic routes. It can fly up to 4500 feet and has a climb rate of 4,350 feet per minute. Its take off distance is 1,738 meters and 1,346 meters for landing.

The Gulfstream II has a maximum payload of 2,184 kg and a fuel tank capacity of 2,775 US Gal. Its maximum take off  and landing weight are of 28,123 kg and 26,535 kg respectively.

Gulfstream II Variants

There were five variants of the Gulfstream II, namely; the G-1159, a twinjet capable of carrying up to 14 passengers that received its certification on October 19 1967, the Gulfstream II TT is a modified version with added range and tip tanks received FAA certification on May 13 1977, the G-1159B was certified on September 17 1981 with broad wings, the Gulfstream II SP was certified on April 22 1994 with added winglets, and the VC-11A that was built as a transport model for VIPs under United States Coast Guard.

All Grumman Aircraft

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