However, the aircraft is not built for sustained supersonic speeds:
... Boeing and the FAA said the 747 is not built for sustained flight at the speed of sound. Its engines aren't powerful enough nor is it designed to deal with a destabilizing shock wave that develops around the speed of sound.
![[레벨:13]](https://gujoron.com/xe/modules/point/icons/default/13.gif "포인트:17031point (74%), 레벨:13/30"){kind=icon}
르네![[레벨:30]](https://gujoron.com/xe/modules/point/icons/default/30.gif "포인트:675442point, 레벨:30/30"){kind=icon}
김동렬
![[레벨:20]](https://gujoron.com/xe/modules/point/icons/default/20.gif "포인트:39565point (96%), 레벨:20/30"){kind=icon}
이금재.
프레임과 날개가 잠시 동안 초음속 비행에 대처할 수는 있지만 지속 비행은 불가능 하다고
1970년 비행실험에서 마하0.99까지 기록한 적이 있다고...
https://aviation.stackexchange.com/questions/32635/was-the-boeing-747-designed-to-be-supersonic
However, the aircraft is not built for sustained supersonic speeds:
... Boeing and the FAA said the 747 is not built for sustained flight at the speed of sound. Its engines aren't powerful enough nor is it designed to deal with a destabilizing shock wave that develops around the speed of sound.