> The key point that's missing in this headline is that it attains that speed 'directly downwind'... As a mind experiment to explain why this seems impossible,

> The key point that's missing in this headline is that it attains that speed 'directly downwind'... As a mind experiment to explain why this seems impossible, After reading TFA and watching this video[1], I think you are wrong. [1]: http://www.youtube.com/watch?v=xHsXcHoJu-A http://www.youtube.com/watch?v=xHsXcHoJu-A