The X-66A test plane uses new kinds of wings to make zero-emission or extremely low-emission aircraft possible.

The new wings are extremely thin. And that's why, in those wings is needed new types of supporting structures that wing. The new wing decreases the use of fuel by about 30%. Officially the X-66A is commercial aircraft, but the same technology can use in other large-size aircraft like cargo planes and maybe also strategic bombers like B-52 or B-1 updates can use these kinds of wings.

There is an interesting detail for that project. The X-66A is made by connecting those new wings to the removed MD-90 aircraft. And that thing tells that there is the possibility that those new wings are installed in the old bodies of aircraft like B-1 or some other aircraft. Those new wings can be installed in sweep-wing aircraft. And that allows making the new type of large-size aircraft with a longer operational radius.

NASA’s ‘airliner of the future’ is now officially an X-plane(PopSci.com/ NASA’s ‘airliner of the future’ is now officially an X-plane)

B-1 "Lancer"

The new wing. Along with sweep-wing technology can be installed in B-1 bombers.

That technology also can be integrated with other planes. The Lockheed-Martin X-59 QueSST ( Quiet SuperSonic Technology) is the test bed for researching the ability to create quiet or low-noise supersonic systems. The form of the aircraft aims the sonic cone at a smooth angle backward. That means the air travels a longer time to the ground. And that thing makes the pressure impulse weaker.

Lockheed Martin X-59 QueSST (Quiet SuperSonic Technology) Low-Boom Flight Demonstrator.

Variable wing geometry is the thing that makes those X-59-type systems more effective. If the wings can turn in the front position. That thing allows developers to make the aircraft able to use short runways. But at the same time that plane can be fast. The variable wing geometry is used in F-14, and F-111 aircraft.

Those planes retired from service after the Gulf War. The only variable- or sweep-wing aircraft in the U.S. arsenal is B-1. And that new technology can make that aircraft more effective than ever before. Russians use that technology in Su-24 and MiG-23 planes as well as in Tu-140 bombers.

https://www.popsci.com/technology/nasa-x-planes/

https://en.wikipedia.org/wiki/General_Dynamics_F-111_Aardvark

https://en.wikipedia.org/wiki/Grumman_F-14_Tomcat

https://en.wikipedia.org/wiki/Lockheed_Martin_X-59_QueSST

https://en.wikipedia.org/wiki/Rockwell_B-1_Lancer

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