He'll also need to deal with the unknown and potentially tricky effects of transonic speed (that is, approaching Mach 1) on the human body.

他还需要处理跨音速未知的和潜在的微妙影响(即，对人体接近1马赫)。

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FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.

7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。

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Pressurizing, continuous and transonic wind tunnel is the first one in our country, and it is the world ' s first class tremendous high - speed aerofoil wind.

增压连续式跨音速风洞在我国尚属首例，是具有国际先进水平的大型高速翼型风洞。

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"Together, we proved that a human in freefall can break the speed of sound returning from near space, going through a transonic phase and landing safely on the ground, " said Dr Jonathan Clark, a former space shuttle flight surgeon and the Red Bull Stratos medical director.

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