"Matthew F Funke" wrote in message
...

No disagreement here. I just wanted to avoid the notion that a
rocket needs to "push against" the ground, air, previously expelled
propellant, or any other thing that is sitting out the back end when the
rocket fires in order to work. (Rockets work better in vacuum than in
air, in fact.)


Right. I think ultimately we're in agreement here.


--
-- With Best Regards,
Matthew Funke )