twinjet

Twinjet denotes an aircraft powered by two jet engines. The two-engine configuration is common on business jets and regional airliners, offering redundancy and typically better takeoff performance than a single-engine design while avoiding the higher fuel and maintenance costs of four-engine layouts. Engines are most often mounted on the wings, but tail-mounted or fuselage-mounted twinjets also exist in some designs.

In aviation practice, twinjet refers to the propulsion arrangement rather than a formal classification. Civil aircraft with two main jet engines are usually certified for continued operation in one-engine-inoperative conditions under specific procedures, enabling safe diversion and landing if one engine fails. The twinjet layout balances efficiency, range, and reliability for many mid-sized and light jet designs.

TwinJet is also used as a brand name by several aviation companies, particularly private jet operators and charter services. These entities offer on-demand charters, aircraft management, and related services, and they may operate fleets consisting of light to mid-size jets. Because the name is used by multiple organizations in different countries, details about fleets and operations vary by operator and market.

See also: two-engine jet, twin-engine aircraft, jet propulsion.