6 ms·... which was already tested for. vacuum or not seems to make no difference on the effect.by m_mueller 11y ago... which was already tested for. vacuum or not seems to make no difference on the effect.ajuc 11y agoIt could also push off the Earth magnetic field.m_mueller 11y agoThen it should depend on the orientation (and altitude, geographical location). According to [1] this was tested for. [1] http://emdrive.com/faq.html http://emdrive.com/faq.html