While browsing for Space propulsion found this book :


Closed Loop Space Propulsion New Faster Approach : The next Step in Space Travel (Paperback) John F Roach Bse

Does anybody knows about this book and type of propulsion ? Thank you.

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    $\begingroup$ I don't know anything about this book and engine specifically, but it looks a lot like the standard "make the system confusing enough that I have forgotten a key force" type of engine. The sentence The geometric structure allows cancellation of unwanted forces which causes a closed system force that is futuristic in nature seems particularly suspect. $\endgroup$ Commented Apr 20, 2023 at 21:29
  • $\begingroup$ Stoyan, there is lots os "crazy" writing about things like engines that have magical properties. It's total nonsense, like reading about ghosts. You're just reading a "scifi article" there, it is not reality or real. You may enjoy ... en.wikipedia.org/wiki/Alcubierre_drive $\endgroup$
    – Fattie
    Commented Apr 22, 2023 at 17:07

1 Answer 1


That looks like a fairly standard "I don't understand magnets"-engine, with a side order of "I don't understand conservation of momentum". Don't spend too much time thinking about it, because it doesn't actually work.

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    $\begingroup$ Add a sprinkling of 'Who's Newton?' and you've got the entire dish. $\endgroup$
    – GdD
    Commented Apr 21, 2023 at 16:15

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