Darts use longer wings for takeoff and subsonic flight.
After supersonic flight, the aircraft uses a shorter 'sharp angle' as its wing.
Beijing, September 3 (Xinhua) according to foreign media reports, NASA has invested in a new type of supersonic aircraft. The shape of this aircraft looks very similar to the quadrangular darts used by samurai, but there are two symmetrical groups of 'sharp corners', one leader and one short.
The design concept of this' dart 'supersonic aircraft is that, before taking off from the ground to subsonic flight, the aircraft has two long' sharp corners' as its wings. And when it reaches supersonic speed, the aircraft will "spin" to make the shorter "sharp corners"