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The Boeing X-66 is an experimental airliner under development by Boeing. It is part of the X-plane series, and is being developed in collaboration with NASA and its Sustainable Flight Demonstrator program. It will use an extra-long and thin wing design stabilized by diagonal bracing struts, which is known as a Transonic Truss-Braced Wing.
Aug 2, 2010. "NASA, Boeing Test Low-Drag Truss-Braced Wing Concept: High-aspect-ratio, truss-braced wing promises marked fuel savings". Aviation Week & Space Technology. Aviation Week Network. January 27, 2014; Warwick, Graham (January 28, 2014). "Will Boeing Embrace Braced Wings?". Things with Wings Blog. Aviation Week Network
It’s called the Transonic Truss-Braced Wing concept, which relies on elongated, thin wings stabilized by diagonal struts that connect the wings to the aircraft. ... Boeing estimates that the ...
The RS1 launch vehicle first flew on Jan 10, 2023. The launch ended in failure. [78] — X-64 Invocon Inc. AFRL — Modular aerospike engine launch vehicle testbed [77] X-65 CRANE: Aurora Flight Sciences: DARPA 2025 Control of Revolutionary Aircraft with Novel Effectors [79] X-66: Boeing: NASA 2028 Transonic Truss-Braced Wing [80]
The test flights will use the highest available blends of SAF in the process. Boeing expects that the fuel burn could be reduced by up to 10%. [48] N8290V in Vietnam Airlines livery at London Stansted Airport in 2022. In June 2023 787-10 N8290V (a Boeing test registration) was used for the first Explorer test/demonstration flights.
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The natural outcome of this requirement is a wing design that is thin and wide, which has a low thickness-to-chord ratio. At lower speeds, undesirable parasitic drag is largely a function of the total surface area , which suggests using a wing with minimum chord, leading to the high aspect ratios seen on light aircraft and regional airliners .
The X-53 Active Aeroelastic Wing (AAW) development program is a completed American research project that was undertaken jointly by the Air Force Research Laboratory (AFRL), Boeing Phantom Works and NASA's Dryden Flight Research Center, where the technology was flight tested on a modified McDonnell Douglas F/A-18 Hornet.