Quote:
Originally Posted by Brett
That is bizarre, freakish, and bound to lead to confusion. Also, not what I was taught in my physics courses.
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But of course specific impulse isn't much used in physics. In spaceflight literature it is by and large quoted in "seconds" even in modern papers where everything is in metric units. In aeronautical engineering, it's almost always quoted in Ns/kg - and never reduced to meters/second, because in fact nothing is moving at anything like that "velocity", which could conceivably exceed the speed of light for a big enough rotor and sufficiently efficient engine.