Preguntas Frecuentes (En Español)




This page presents a method of space propulsion (Fluid Space Drive) that has no need to expel propellant and therefore can accelerate a spacecraft for long periods of time. (It has also been called the Bumblebee Space Drive, because according to engineering it shouldn’t work, but if you build it does)




Video presentation of the Fluid Space Drive.

NOTE: There is a mistake in the video, where it states that the cylinder exerts a force of 100n, it should state a force of 200n


Simple description of the proposal (Version 3)
Using two astronauts and batman (Adam West version).


A step by step explanation of the principals involved

(for the serious minded, no kids, no skateboard, no batman, no puns).


Article on Fortean Times magazine by David Hambling on the FSD.



Note to persons reproducing the experiments.


You can do an experiment that demonstrates the idea using the same set up available in physics classrooms for demonstrating of the Law of Conservation of Momentum. (see here for instructions)

The above experiment is simpler than the previous method described to test the idea (see 

A few words of thanks to persons that are voluntary testing the idea investing their time and expense, motivated principally by curiosity, I have been surprised by the positive reaction. “I genuinely want to finding out for myself if this works” (JM) is a typical response.

For any that wish to participate (the more the better) I will repeat the request/offer that anybody that wishes can reproduce the experiments and prove me wrong (or right)
I am told it is customary that volunteers receive some sort of “perk” for their effort, the first 20 persons that try one of the above experiments(regardless of results) will receive 10 shares of a soon to be created company (startup as it is the fashion these days) under the conditions outlined here.



Contact Information

William John Elliott S.
(Exit code) 56-2-2042863
(Exit code) 56-9-85530114

william.john.elliott (contact on Skype)