Newb here with a question. correct me if I've got anything wrong(I'm assuming I've got quite a number of errors here, so be patient) I'm assuming that in a rocket, the energy release in the combustion chamber is directed 2 ways, up and down and the one that provides propulsion is the force acting upwards and the force released downwards is wasted. in rockets, I have observed that at least half of the total energy released during the explosion in the combustion chamber is wasted as exhaust fumes which does not contribute to the velocity of the rocket. It is quite obvious, that if this half of the force can be redirected upwards(meaning all the momentum at every direction is focused only one direction) then the velocity of the rocket can be increased by a hundred percent. Is it possible to reflect this force upwards to further increase the rockets velocity? There is also another theory that I'm still not sure about, but here goes. According to Newton's third law, if a force's opposite equal is reflected to the same direction, and another opposite force of the opposite force is produced during the reflection and is reflected by the same reflectant(thing which had reflected the first opposite force) and another opposite force is produced and reflected, an infinite amount of forces can be made. This could mean that one explosion is enough to send a rocket moving for an infinite period. I'm guessing that there are other laws which would restrict this principle from existing. Still, iis it plausible at all? All in all, both these theories are merely hypothesis and not true unless proven. Thx for any help at all. I'm just wondering.