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The Lockheed JetStar is a business jet produced from the early 1960s to the 1970s. Initially designed as a private venture, it was also selected to fulfil a 1956 US Air Force requirement for a multi engined light transport and crew trainer. The first JetStar prototype was equipped with two Bristol Siddeley Orpheus engines and flew on 4 September, 1957. A second was re-engined with four Pratt & Whitney JT12s and took its maiden flight in 1960, with deliveries commencing early 1961. The original prototypes used a tricycle landing gear with one wheel per leg, but the nose gear was modified in 1962 with two tyres.

The JetStar has a swept wing and a cruciform tail. The wing has a 30° sweepback and features large fuel tanks at about half span, extending some distance in front and behind the wing.

The turbojet powered JetStar remained in production until mid 1973, being superseded by a turbofan powered model. The JetStar II has four Garrett TFE731 engines, each providing 3,700 lbf of thrust, that have significantly improved fuel consumption and allow a higher maximum take off weight. The JetStar II first flew on 18 August, 1976, with certification following in December that year. The II remained in production until 1979.

The JetStar seats ten passengers with a flight crew of two. To allow a passenger to walk upright in the cabin, the aisle is sunk slightly so that the seats are raised on either side.

Elvis Presley owned two Lockheed JetStars; one, called Lisa Marie after his daughter, remains at Graceland.