[tpaine]

"I'm afraid I don't understand what you're driving at, either. Could you spell it out for us?"

'Cin' can't explain, - because he's playing a semantic game, [about the word 'push'] with the point at issue, -- in an effort to show how clever he is, vs the supposedly 'inept' author.
The issue:

"The propellor or the jet engine of an aircraft push air backwards to propel the aircraft forward. A ship or boat propellor does the same thing with water. On Earth there is always air or water available to push against. But a rocket in space has nothing to push against, and so it needs to carry propellant to eject in place of air or water."
_________________________________

Perfectly simple point made above.
-- If you are on the ground you must push against it to move forward.
-- If you are in the water you must push against it to move forward.
--- If you are in the air you must push against it to move forward.
--- If you are in space you can't push against it to move foward, you must eject something away from you.

I submit that 'cinfla' can use his large surplus of internal hot air for this purpose.

[cinFLA]

-- If you are in the water you must push against it to move forward.
--- If you are in the air you must push against it to move forward.

tpaine shows his stupidity. He should stick to his paid spamming on his drug legalization threads. His motto: Ecstasy in every pocket.