A business jet, private jet, or bizjet is a jet aircraft designed for transporting small groups of people, typically business executives and high-ranking associates. Business jets are generally designed for faster air travel and more personal comfort than commercial aircraft, and may be adapted for other roles, such as casualty evacuation or express parcel deliveries, and some are used by public bodies, government officials, VIPs, or even the armed forces.
The first small, jet-powered civilian aircraft was the Morane-Saulnier MS.760 Paris, developed privately in the early 1950s from the MS.755 Fleuret two-seat jet trainer. First flown in 1954, the MS.760 Paris differs from subsequent business jets in having only four seats arranged in two rows without a center aisle, similar to a light aircraft, under a large sliding canopy similar to that of a fighter. A U.S. type certificate was awarded in July 1958, but commercial sales were limited, with most examples going to the military; an improved civilian version similar to a modern very light jet, with a six-seat enclosed cabin and a conventional door, never proceeded past the prototype stage. The commercial failure of the MS.760 Paris prompted the cancellation of projects by Cessna and Douglas Aircraft to market similar jets.
The development of center-aisle cabin business jets was accelerated by an August 1956 United States Air Force (USAF) letter of the requirement for two "off-the-shelf" aircraft, the larger UCX (cargo) and smaller UTX (trainer). These requirements differed from standard USAF procurement contracts in that no formal competitions would occur, and manufacturers were expected to develop the aircraft without government funds; despite this, a substantial USAF purchase would offset the large investment necessary to develop prototypes. Both Lockheed Corporation and McDonnell Aircraft began the development of UCX aircraft, while North American Aviation pursued the UTX requirement.
The Morane-Saulnier MS.