Question Powder power...

Nov 25, 2019
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Given that a powder in a confined space will explode when mixed with air and ignited, is it not feasible to have a propulsion system that mixes a fine powder with oxygen and ignites it repeatedly? (whilst in space rather than a lift off system)
Almost certainly rubbish for an obvious reason... could someone tell me why this might be unachievable?

...Or even as a terrestrial power source... surely very cheap fuel?
 

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