A tiltrotor aircraft combines the vertical lift capability of a helicopter with the speed and range of a turboprop airplane.
Their two engines, which tilt on the wings, move the "proprotors" in a counterotating way to counteract the torque of the body.

1941 Focke-Achgelis Fa 269

Nazi tilt-rotor VTOL fighter project. Powered by a single radial engine buried behind the cockpit with a fixed wing and two tilt three-bladed rotors. Only a full-scale mock-up was built before allied bombing raids interrupt its development

Focke Achgelis Fa 269

1945 Platt and LePage

proposed and patented the first American tilrotor aircraft but the lack of capital caused the company to shut down in August of 1946

Platt and LePage

1950s - 1960s

Many convertiplanes were built, including the Vertol 76 (1957), Hiller X-18 (1959), LTV XC-142 (1964), Curtiss-Wright X-19 (1963), Canadiar CL-84 Dynavert (1965, picture) and the Nord 500 (1967). They all used a whole tilt wing instead of a tilting engine design

Canadiar CL-84 Dynavert

1954 Transcendental Model 1G

First tiltrotor to fly. It was a single seat aircraft powered by a single piston engine. The only one built crashed in 1955

Transcendental Model 1G

August 23, 1955 Bell 200 [XH-33] XV-3

Starting built in 1953, this experimental aircraft featuring tilting wingtip rotor assemblies flew until 1966. The airframe returns to Texas in 2004 for restoration.

Bell XH-33 XV-3

1969 Bell 300

Development Mock-up
Bell 300

May 3, 1977 Bell 301 XV-15

Started in 1972 under funding from NASA and the US Army. After three decades is continuing to be used as experimental testbeds.


1987 Bell/Boeing Pointer

An RPV tiltrotor, for research and development weighing 250kg: less than one per cent of the future V-22 Osprey

Bell Boeing Pointer

March 19, 1989 Bell/Boeing V-22 Osprey

First tiltrotor to enter serial production

Bell Boeing V-22

March 6, 1998 Bell 918 Eagle Eye

An unmanned aerial vehicle (UAV) for military use

Bell 918 Eagle Eye

Bell Boeing Quad TiltRotor (QTR)

A proposed four-rotor derivative of the V-22 with a cargo capacity equivalent to a C-130 Hercules

Quad Tilt Rotor

March 6, 2003 Bell/Agusta BA609

A civilian six to nine passenger tilt-rotor

Bell Agusta BA609

2013 NASA's GL-10 Greased Lightning drone

With a ten-foot/6.7m wingspan and boasts ten electric engines all on tiltwings. With the wings pointed up, the drone take off and land like a helicopter. Once airborne, they'll tilt forward A civilian six to nine passenger tilt-rotor


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