In spite of the black background and white letters, this is not a crackpot site. (I should have realize that earlier because it's not in all caps.)
This has interesting historical information, but some details are wrong:
> Moreover, it was not even based on Newton’s Third Law of Motion.
Everything is based in the Newton’s Third Law [1]. The difference is that this method use the Third law in a different way. The interaction is not spaceship-fuel but spaceship-planet. The planet is pushed slightly.
[1] Well, except magnetism and a few experiments that involve a lot of field interaction, where you need to consider the momentum of the field.
This has interesting historical information, but some details are wrong:
> Moreover, it was not even based on Newton’s Third Law of Motion.
Everything is based in the Newton’s Third Law [1]. The difference is that this method use the Third law in a different way. The interaction is not spaceship-fuel but spaceship-planet. The planet is pushed slightly.
[1] Well, except magnetism and a few experiments that involve a lot of field interaction, where you need to consider the momentum of the field.