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Old 17th April 2019, 08:12 AM   #12
Just the right amount of cowbell
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Join Date: Oct 2008
Location: Well past Hither, looking for Yon
Posts: 6,379
Originally Posted by dann View Post
Is he/she saying that you might as well pour the rocket fuel directly out of the exhaust pipes without igniting it to create thrust because the mass is all that matters???
Sort of. From the equations, I think he/she is saying that if you take a pipe, squirt fluid into it at one end, have that fluid come out of the other end at the same speed, then there won't be any thrust on the pipe.

Which is true, but it's not a good description of how rockets work.
"In times of war, we need warriors. But this isn't a war." - Phil Plaitt

Last edited by dasmiller; 17th April 2019 at 08:15 AM. Reason: a bit of clarification
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