Lockheed XFV-1 Salmon
As a result of Lockheed’s enormous budget, it was able to take off vertically, land vertically as well, tear out engines, and bring some of the Army’s original objectives to fulfillment.
Grumman X-29
The United States Air Force purchased the Grumman X-29 aircraft in the 1980s and 1990s. This aircraft had forward-swept wings that were more aerodynamic, but it was impossible to fly. The digital flight computers allowed it to correct its trajectory as many as forty times per second, which is something that would be impossible to perform without computers.