(inside the solar system..not outside..) For this thread I have one criterium (and what's with all the 'new and improved spellings ?) : It must be do-able..current science fact only.. So..my space liner would be driven by 8 large gyroscopes..(or more..like 4 per drive in the drive train..) Why ? It can use solar cells to be powered... Combustibles in outer space are a bad way to travel since they always expend and leave you sitting in the middle of the solar system running on fumes.. 4 synchronized gyroscopes spinning against each other would create the push needed to move forward... What I have in mind is hard to put on paper..anyone have any ideas for a simple 3D build program ? (I long since hoped for something like that..but it's searching for a cookie in webstack..) Furthermore..would it be possible to create one that uses it's initial spin to help lift off from (lower) G'ed planets..like Mars ? By design it would of course be entirely dumb to make the entire liner land and take off, but smaller versions might be able to do so.. (and yes..anyone tapping me on the head saying "cuckoo" is certainly entitled to do so..), but that's why I'm on the fringe right ?..