Doesn't work that way - material thrown within the ship will encounter resistance with the air, hull, etc. This will generate a force equal to the force of the propellant, thus neutralizing the thrust of the propellant. Its the ol' opposite and equal reaction thingie - the movement of the propellant will "push" on the ship, but the interaction of the propellant with the ship will push back equally. Net effect - zero thrust.

These kinds of internal energy transfer system only work in places where there is friction to counter the unwanted "return" energy of the propellant. Basically, you can thrust in one direction using a lot of force quickly, pushing the object forward. You then recover your propellant slowly, so the force of the propellant moving in the "wrong" direction doesn't exceed the static friction holding you in place.

That doesn't work in space - no friction.


Doesn't work that way, for the reasons mentioned above. In space, the net thrust of this kind of system is zero. And even in places where it is possible, the ISP would suck.


Only if the contents of that hose are free to leave the ship. If they are not, the momentum of the air will be transfered back to the ship, providing a net zero thrust.


Open the system though - eject that air out of the ship itself - and you'll move along quite nicely.


Because that is the problem with your own model. Your space ship is a closed system; matter can neither enter nor leave. You can exert forces within such a system, but the sum of those forces will always be zero at the level of the system itself

the above are from page 2 and 3

I dont want to spend the rest of the night showing you your insistence that the
pipe wont move.

Im certain I can find plenty in the other 13 pages however.

in my personal opinion , I think , I believe that you need
to learn how to assess a situation , and adapt to it , adapt to the changes.

3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.