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Anonymous
>>134524it was >hard to channel the force in one direction Ninjatoes solved that problem by basically putting them inside a tight box, from which they can't escape: they can only move front and backwards, since sideways and up and down are blocked by the walls of the box (not entirely true on Ninjatoe's design since he uses 4 springs in one box, but that's the basic idea behind it).
>>How the force contained in the spring be used for movement... that's the tough thing. Yeah, mostly because a spring is just a short, one time burst and doesn't really offer perpetual motion: you need to press/release it every time. If you study "old school" mechanisms (cranks, gears and stuff) and "paper automata" you'll find that there are many mechanisms you can make in paper to get things moving. This is a good place to start: http://www.flying-pig.co.uk/mechanisms/pages/linear.html
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