我剛查了一下.

其實問題點不是"機翼".

我簡單說一下下面英文的翻譯.

問題點在於那頭頂上的螺旋槳. 在機身到達音速以前螺旋槳早就超過音速. 而且如果飛行越快, 音速所造成的震動波(shockwave)到後面可能會把螺旋槳整個震壞掉.

所以如果要維持有螺旋槳的音速飛行的話, 目前技術上無法克服.

但是如果是"到達音速以前把螺旋槳收起來改為類似飛機飛行的方式", 這我就不知道了. (不過這樣做幹麻.. 現在有戰機已經可以像直升機一樣垂直起降低空徘徊.. 而且也可以到達音速. 做出這種直升機好像多此一舉..)

The simple, and not so simple answer is yes. It can exceed the speed of sound if spun fast enough. However, there are several issues.

Because the blade is rotating, and not flying straight into the air, then the outer tip will be moving through the air faster than the base. In fact, the airspeed of the blade will increase as you move out. So what will happen is that the tips of the blades will be the first to reach mach 1. A shock wave will form at the tip of the blade. As the blade increases rotational speed, the shockwave will move along the blade as more of the blade goes supersonic.

The big problem with this is that the blades really aren't designed to withstand the stresses of supersonic travel. They will end up disintegrating. It also means that a portion of the blade will be 'transonic' (at or near the speed of sound). In this region there are problems with airflow and controllability, which will severely hamper the performance of the blade. Loss of lift and poor control will be major symptoms. Noise is the other issue.