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Jeeze, really HackerNews/BoingBoong news are not good science sources. This "reaction-less" drive is simple variation of the "Dean drive" (another "space thrus
by jmount 12y ago
Jeeze, really HackerNews/BoingBoong news are not good science sources. This "reaction-less" drive is simple variation of the "Dean drive" (another "space thruster" that only works if it is on a kitchen floor so that it can do standard work and exploit the different scales of static and slipping friction). I thought this was at least going to be the "microwave thruster" that works in cheap partial vacuum (but not in actual deep vacuum). Not even new bad ideas.
- dang 12y agoIt sounds like you know something about this topic. I don't, and I'm sure that many other HN users don't either. Your comment would be better, I think, if you assumed that people here are curious to learn and shared your knowledge in a way that was easier to absorb. If bad ideas are circulating, offer better ideas and explain why they are better. That strategy may not work everywhere, but at least some of the time it does work here.
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- jmount 12y agoI guess I would say if you are truly curious about physics read about conservation of momentum, Noether's theorem, and things like that. You get really neat things like: if you assume general relativity is position invariant then you can prove it has conservation of momentum (i.e. you don't have to directly assume conservation of momentum!).
- scott_s 12y agoI think what Dan was trying to nudge you towards was sharing some of your knowledge with us, and starting some good discussion on those topics.
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