[aircraft] Grumman X-29 (1984)


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From Wikepedia:
The Grumman X-29 was an experimental aircraft that explored a number of new technologies; the most immediately obvious being the forward-swept wings and canard control surface. The inherent aerodynamic instability of this arrangement required the use of computerized fly-by-wire control, and advanced composite materials were needed to make the wing sufficiently rigid without being unacceptably heavy. The X-29 first flew in 1984 and two X-29s were flight tested over the next decade.

More info here:
Grumman X-29 - Wikipedia, the free encyclopedia