IAI Westwind

The Israel Aircraft Industries (IAI) Westwind 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.

IAI Westwind
Class Aircraft
Type Utility
Manufacturer Israel Aerospace Industries
Production Period 1965 - 1987
Origin Israel
Country Name Origin Year
Israel 1963
Country Name Operational Year Retirement Year
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Germany View
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Israel 1965 View
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Panama View
Uganda View
United States of America View
ManufacturerName Production From Production To Quantity
Israel Aerospace Industries 1965 1987 442 View

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. 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.

Variants

Aero Commander

  • 1121 Jet Commander
  • 1121A
  • 1121B Commodore
  • 1122

IAI

  • 1123 Westwind
  • 1124 Westwind
  • 1124 Westwind I
  • 1124N Sea Scan
  • 1124A Westwind II



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.

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. Not long after the aircraft went into production, the original General Electric CJ610 turbojet engines were replaced by more fuel-efficient Garrett TFE731 turbofans 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 delivered from 1976.

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.

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.

General characteristics

  • Crew: Two (pilot & co-pilot)
  • Capacity: Up to 10 passengers
  • Length: 15.93 m (52 ft 3 in)
  • Wingspan: 13.65 m (44 ft 9½ in)
  • Height: 4.81 m (15 ft 9½ in)
  • Wing area: 28.64 m² (308.3 ft²)
  • Empty weight: 6,010 kg (13,250 lb)
  • Max. takeoff weight: 10,660 kg (23,500 lb)
  • Powerplant: 2 × Garrett TFE731-3-1G turbofan engines, 16.46 kN (3,700 lbf) each

Performance

  • Maximum speed: 868 km/h (469 knots, 539 mph) at 8,840 m (29,000 ft)
  • Cruise speed: 723 km/h (390 knots, 449 mph) econ cruise, at 11,890–12,500 m (39,000–41,000 ft)
  • Stall speed: 184 km/h (99 knots, 114 mph) CAS, flaps down, engines idling
  • Range: 4,430 km (2,392 nmi, 2,770 mi) with maximum payload
  • Service ceiling: 13,720 m (45,000 ft) (max certificated ceiling)
  • Rate of climb: 25.4 m/s (5,000 ft/min)

End notes