
Grumman X-29
Grumman manufactured two airframes. They flew a total of 437 flights between 1984-1992. On Dec. 13, 1985, the X-29 became the first forward-swept-wing airplane in the world to exceed Mach 1 in level flight.
- X
https://www.nasa.gov/image-detail/grumman-x-29/
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