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The Lockheed Martin X-56 is an American modular unmanned aerial vehicle that is being designed to explore High-Altitude Long Endurance (HALE) flight technologies for use in future military unmanned reconnaissance aircraft.
• Aircraft typically carry around enough structure to keep flutter 15% above the design dive speed (V D), which has margin above the max operating speed (V MO) • Instead, design the wings with less structure and let flutter occur closer to V D and use the control system to provide the airspeed margin from instability.
The maximum level flight speed is 135 kn, and the aircraft can achieve up to 150 kn in a dive. The aircraft carries 82 lb of Jet-A fuel in a tail-mounted fuel tank.
The X-56A will test to the edge of the flight envelope in an effort to mature technologies that will lead to more slender, lightweight, high-aspect-ratio wings, resulting in better aircraft performance.
Although the X-56A MUTT is a low-speed, subsonic, sub-scale research aircraft, aircraft that fly faster than the speed of sound also can benefit from this research.
23 sty 2014 · Research results from the low-speed sub-scale X-56A will benefit future designs for both subsonic and supersonic aircraft. The goal of the X-56A project is to advance aeroservoelastic technology through flight research using a low-cost, modular, remotely piloted aircraft.
12 lis 2013 · The X-56 is capable of a maximum speed of 150 knots, but flutter onset with the flexible wings comes at about 110 knots, a speed well within the aircraft’s flight envelope.
