Editing Grumman X-29 (section)

{{Short description|1984 experimental aircraft family by Grumman}}
{{Redirect|X-29|similarly named topics|X29 (disambiguation){{!}}X29}}
{{Use dmy dates|date=May 2024}}
{{Infobox aircraft
  |name =  X-29
  |image = Grumman-X29-InFlight.jpg
  |caption = A Grumman X-29 in flight
  |type = [[Experimental aircraft]]
  |national_origin = United States
  |manufacturer = [[Grumman]]
  |designer =
  |first_flight = 14 December 1984
  |introduction =
  |number_built = 2
  |status = Retired
  |unit cost =
  |primary_user = [[United States Air Force]]
  |more_users = [[NASA]]
  |developed_from =
  |variants =
}}

The '''Grumman X-29''' is an American [[experimental aircraft]] that tested a [[forward-swept wing]], [[canard (aeronautics)|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.<ref>{{Cite news |url=https://www.cnn.com/style/article/grumman-x-29-nasa-darpa-fighter-plane/index.html |title=X-29: NASA's ambitious 1980s fighter jet with inverted wings |website=CNN |last=Prisco |first=Jacopo |date=12 July 2019 |access-date=30 May 2024 |language=en}}</ref>  The [[aerodynamics|aerodynamic]] instability of the X-29's airframe required the use of computerized [[fly-by-wire]] control. [[Composite material]]s were used to control the [[Aeroelasticity#Divergence|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.