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.
Argentina
Australia
- GAF Pika â manned test craft for drone program
Brazil
Canada
France
Germany
Italy
Poland
Japan
Russia/Soviet Union
Spain
- Cierva C.4 1923 â Experimental autogyro, first to fly
- Cierva C.6 1924 â Experimental autogyro
Sweden
Switzerland
United Kingdom
United States
X-planes
Other experimental types
See also
References