Why NASA Built a Plane With a Wing That Turned Sideways

NASA's AD-1 really flew with a wing that rotated across its fuselage. Why build an airplane that looked so wrong—and what did the experiment actually prove? The AD-1 completed 79 flights and reached 60 degrees of wing sweep. It demonstrated low-speed piloted flight with an oblique wing, but it did not test the proposed high-speed efficiency of a larger transport aircraft. This episode separates the result from the prediction. Archival imagery: NASA photographs ECN-15846, EC81-14632, EC80-12694, E-36067 and ECN-17954. Conceptual diagrams and wing-pivot animations are original illustrations, not archival flight footage. This channel is independent and is not affiliated with or endorsed by NASA. Sources: NASA AD-1 research overview: https://www.nasa.gov/reference/ad-1/ NASA AD-1 image article: https://www.nasa.gov/image-article/ad-1/ NASA AD-1 fact sheet: https://www.nasa.gov/wp-content/uploa... NASA photo ECN-15846: https://www.nasa.gov/image-detail/ame... NASA photo EC81-14632: https://www.nasa.gov/image-detail/amf... NASA photo EC80-12694: https://www.nasa.gov/image-article/pi... NASA photo E-36067: https://www.nasa.gov/image-detail/coc... NASA photo ECN-17954: https://www.nasa.gov/image-article/re... #NASA #AD1 #Aviation #AerospaceEngineering