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What does a rocket push against in space?

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posted on Jul, 19 2017 @ 07:11 PM
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a reply to: sapien82




posted on Jul, 19 2017 @ 07:37 PM
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originally posted by: buddha

But in the vacuum of space you have Nothing to push against.


Yeah, you're "pushing" against the rockets own "inertia."

A smart fella called Einstein claimed that "inertial mass" and "gravitational mass" are indistinguishable from one another. So, the same "mass" that causes the rocket to "feel" the planetary gravitation, also produces "resistance" to acceleration when you try to "push" that rocket faster way out in space where the gravitational forces of all the bodies in the universe is small.



posted on Jul, 20 2017 @ 08:07 PM
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I stated in a previous post in this thread that a rocket engine produces thrust mainly because of the pressure difference between the to sides of the combustion chamber. One side high pressure and the other where the opening is low pressure with thrust being in the direction of the high pressure side.

In this post I am making a clarification. The low pressure side has to be at 0 or negative pressure for the thrust to occur.

For those attempting to design an inertial propulsion engine must take this concept into consideration.
edit on 20-7-2017 by eManym because: (no reason given)



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