IAI Westwind

Jet Commander/Westwind
Time Air Sweden IAI 1124 Westwind
Role Business jet
Manufacturer Aero Commander
Israel Aircraft Industries
First flight 27 January 1963
Introduction 1965
Status Active service
Primary user Pel-Air
Produced 1965–1987
Number built 442
Developed from Aero Commander 500
Variants IAI Astra
Gulfstream G100

The Israel Aircraft Industries (IAI) Westwind (formerly Aero Commander 1121 Jet Commander) is a business jet that became a cornerstone of the Israeli aircraft manufacturing industry and remained in production for 20 years. Usually configured for seven passengers, it can carry as many as 10, or be quickly reconfigured as a fast air freight aircraft.

Design and development

The Westwind was originally designed in the United States by Aero Commander as a development of its twin-propeller namesake aircraft, first flying on January 27, 1963 as the Aero Commander 1121 Jet Commander.[1] It was of broadly conventional business jet arrangement, with two engines mounted in nacelles carried on the rear fuselage. However the wings were mounted halfway up the fuselage instead of the typical low-wing arrangement of aircraft in this class. After successful testing, the aircraft was put into series production with deliveries to customers beginning in early 1965.[2]

After initial testing of the prototype it was modified to production standard with an addition 2ft 6in to the fuselage length and increased payload and all-up weights. The second prototype first flew on 14 April 1964 which was followed by the first production aircraft in November 1964. Type approval was awarded by the FAA in November enabling the first customer delivery on 11 January 1965.

Operational history

Shortly thereafter, Aero Commander was acquired by North American Rockwell. The Jet Commander created a problem, since Rockwell already had an executive jet of its own design, the Sabreliner, and could not keep both in production because of anti-trust laws. Therefore, the company decided to sell off the rights to the Jet Commander, which were purchased by IAI in 1968.[2]

Jet Commander production amounted to 150 aircraft in the United States and Israel before IAI undertook a series of modifications to create the 1123 Westwind. These included stretching the fuselage and increased maximum takeoff, maximum landing, and maximum zero-fuel weights, with the wing modified to incorporate double-slotted flaps and drooped leading edges and tip tanks. The trimmable horizontal stabiliser was also modified to have increased span and more travel.[3] Not long after the aircraft went into production, the original General Electric CJ610 turbojet engines were replaced by more fuel-efficient Garrett TFE731 turbofans[2] There were also numerous airframe modifications, such as drooped leading edges on the wings, a dorsal fin, revised engine pylons and nacelles, and further increases in maximum takeoff, maximum landing, and maximum zero-fuel weights. With improvements to a number of onboard systems incorporated as well, these changes resulted in the 1124 Westwind[3] delivered from 1976.[2]

In 1976, in the wake of the terrorist takeover of the Savoy hotel in Tel Aviv, the Israeli Air Force decided to use the Westwind as the basis for a maritime patrol aircraft, which became known as the IAI Sea Scan, it had originally been developed to meet a requirement for the United States Coast Guard for a HU-16 Albatross replacement the Dassault Falcon was selected.

In 1980, deliveries of the Model 1124A commenced; modifications included a new wing centre-section and the addition of winglets to the tips. The revamped aircraft was called the Westwind II, replacing the original design in production. IAI built its last Westwind in 1987, after a total of 442 Jet Commanders and Westwinds had been built, switching production to the Astra.[2]

Variants

Aero Commander

1121 Jet Commander
Original production version, powered by two General Electric CJ610-1 engines developing 2,850 lbf (12,700 N) each; or modified with two CJ610-5 engines developing 2,950 lbf (13,100 N) each. A total of 120 were built including two prototypes.[3]
1121A
Approved in 1967 the 1121A had overwing refuelling points with integral fuel tanks, new wheels, tires and brakes, improved cockpit lighting, maximum ceiling increased to 45,000 ft and all-up weigh to 17,500lbs, kept the CJ610-1 engines; 11 built.[3]
1121B Commodore
Version manufactured with CJ610-5 engines; 19 built.[3]
1121C
Unofficial designation for 1121 aircraft modified under a Supplemental Type Certificate with an increased all-up weight available from 1971.
1122
Improved version developed but not put into production; two aircraft built and subsequently converted to 1123 Westwinds.[3]

IAI

This modified Westwind was used by Australian Customs; seen here at Perth Airport (early 1990s).
Westwind II
1123 Westwind
Improved version of the 1121. The cabin was stretched by 0.51m (1 ft 8in) and the aircraft was fitted with more powerful CJ610-9 engines developing 3,100 lbf (14,000 N) each and a Microturbo Saphir III auxiliary power unit (APU).[3] 36 built[2]
1124 Westwind
Greatly improved version powered by two Garrett TFE731-3-1G turbofan engines developing 3,700 lbf (16,000 N) each, APU deleted.[3]
1124 Westwind I
Name given to 1124 after introduction of Westwind II.[2]
1124N Sea Scan
Maritime surveillance aircraft.[2]
1124A Westwind II
Refined version of the 1124 built from 1980 onwards.[2]

Operators

Civil operators

 Australia
 Canada
 United States

North Country Aviation, Gaylord, Mi. Chartered

Military operators

 Chile
 Ecuador
 Honduras
 Israel
´ Mexico
 Panama
 Uganda
 United States

Specifications (1124A Westwind II)

Data from Jane's All The World's Aircraft 1982-83[7]

General characteristics

Performance

See also

Related development
Aircraft of comparable role, configuration and era
Related lists

References

Notes
  1. ↑ Scott A. Thompson, Flight Check!: The Story Of Faa Flight Inspection (Government Printing Office, 1990) p108; "Jet Commander Flies", by Gerald J. Schlaeger, Flying magazine (April 1963)p30
  2. 1 2 3 4 5 6 7 8 9 Frawley 1997, p. 123.
  3. 1 2 3 4 5 6 7 8 "FAA Type Certificate Number A2SW." FAA. Retrieved: 4 January 2008.
  4. 1 2 Hartoch 1979, p. 43
  5. ↑ Hartoch 1979, p. 44
  6. ↑ Hartoch 1979, p. 42
  7. ↑ Taylor 1982, pp. 124–126.
Bibliography
  • Frawley, Gerald. "IAI Westwind". The International Directory of Civil Aircraft 1997/98. Fyshwick ACT: Aerospace Publications, 1997. ISBN 1-875671-26-9.
  • Taylor, John W. R. Jane's All The World's Aircraft 1982-83. London: Jane's Yearbooks, 1982. ISBN 0-7106-0748-2.
  • Hartoch, Noam. Jet Commander - Westwind Tonbridge, Kent, England:Air-Britain (Historians), 1979. ISBN 0 85130 075 8
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