这次试飞，HB-SIA的升空速度低于30英里每小时（约48公里每小时），起飞的助跑距离也相对短一些。
During the flight, HB-SIA lifted off at just under 30 mph and a relatively short takeoff run.
如果你在起飞或者降落，当你进入这股强烈的逆流时，你就会发现你的空速表示数突然急剧上升。
If you are taking off or landing, then you will see your indicated airspeed suddenly come UP as you fly into this sudden headwind .
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