Twin-boom aircraft

Fairchild C-119 Flying Boxcar, doing a parachute drop from the rear
de Havilland Vampire T.11, whose booms keep the rear fuselage clear of the jet exhaust
Caproni Ca.3, whose booms provided clearance for a propeller - and a position for a gunner to fire to the rear

A twin-boom aircraft has two longitudinal auxiliary booms. These may contain ancillary items such as fuel tanks and/or provide a supporting structure for other items. Typically, twin tailbooms support the tail surfaces, although on some types such as the Rutan Model 72 Grizzly the booms run forward of the wing. The twin-boom configuration is distinct from twin-fuselage designs in that it retains a central fuselage.