List of experimental aircraft

As used here, an experimental or research and development aircraft, sometimes also called an X-plane, is one which is designed or substantially adapted to investigate novel flight technologies.

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A group of 1950s NACA research aircraft

Canadair CL-84 Dynavert tilt-wing VTOL research aircraft

Breguet-Dorand Gyroplane Laboratoire

SNECMA Coléoptère experimental tailsitter in 1959

Dornier Do 29 tilt rotor STOL

Heinkel He 178 pioneering turbojet-powered aircraft

Opel RAK.1 rocket engine research aircraft

Caproni-Campini N.1/CC.2 experimental motorjet and second jet aircraft to fly

Gasuden Koken

NAL Asuka

Antonov A-40 tank glider

Bartini Beriev VVA-14 Ekranoplan

Yakovlev Yak-36 VTOL research vehicle

Cierva C.6 autogiro

Avro 707 research aircraft in formation with Avro Vulcan bomber prototypes

Fairey Delta 2 research aircraft

Gloster E.28/39 jet engine research aircraft

Miles M.35 Libellula canard research aircraft

Rolls-Royce thrust measuring rig VTOL testbed

Bell X-1 supersonic research aircraft

Bell X-5 variable-sweep wing testbed

North American X-15 hypersonic rocket-powered research aircraft

Grumman X-29 forward swept wing and stability research aircraft

US Army Bell 533 high speed helicopter research aircraft

XFV-12A on ramp at NAA in Columbus, Ohio

Scaled Composites Proteus in flight during 2002 for US Department of Energy ARM - UAV program

Lockheed Vega Winnie Mae high-altitude research aircraft – confirmed existence of jet stream

Lifting body research aircraft – from left to right, X-24A, M2-F3 and HL-10

Northrop N-9M flying wing

Vought V-173 disk wing research aircraft