[dayglored]

> Producing thrust without releasing propellant doesn’t defy the laws of physic. It does defy the way we do things, but that’s because we got addicted to rockets. But let’s not forget that they are 13th century technology, there are options.

I'll ask you to elaborate on these non-physics-obeying "options". But first, please read up a little on "Conservation of Momentum". Google it. Here's a starting point:

Conservation of Momentum

(Also, please note that electrostatic/electromagnetic attraction/repulsion is not propulsion/thrust.)

[discostu]

There’s all kinds of ideas out there. From magnetic guns, to launch loops, to skyhooks. Remember we put things in the air all the time that don’t propellant, now many of them do use propellers, and that becomes a non-starter when you run out of air. And electromagnetic is very much propulsion, though not thrust.

There’s a lot of tech talk out there about how our love of rockets has held us back. Rockets actually kind of suck. But we understand them.