Grumman X-29

X-29
A Grumman X-29 in flight
General information
Type	Experimental aircraft
National origin	United States
Manufacturer	Grumman
Status	Retired
Primary users	United States Air Force NASA
Number built	2
History
First flight	14 December 1984

The Grumman X-29 is an American experimental aircraft that tested a forward-swept wing, canard control surfaces, and other novel aircraft technologies. Funded by NASA, the United States Air Force and DARPA, the X-29 was developed by Grumman, and the two built were flown by NASA and the United States Air Force.^[1] The aerodynamic instability of the X-29's airframe required the use of computerized fly-by-wire control. Composite materials were used to control the aeroelastic divergent twisting experienced by forward-swept wings, and to reduce weight. The aircraft first flew in 1984, and two X-29s were flight tested through 1991.