Boeing A160 unmanned helicopter



Flight testing of Boeing A160T Humingbird unmanned rotorcraft in Victorville, California

Lockheed P-791



The P-791 is an experimental aerostatic/aerodynamic hybrid airship developed by Lockheed-Martin corporation.

Grumman X-29



The Grumman X-29 experimental aircraft, with forward-swept wings and canard control surfaces. It has computerized fly-by-wire control, and the wings are made of composite materials. It first flew in 1984.