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"Jon Palmer" <jon@zemi.net> skrev i meddelandet
news:H7uLH0.I7r@lugnet.com...
> Imagine a winch pulling a rope or cable through a series of pulleys
> (horizontal) that are staked to the ground. [...]
>
> Now imagine this setup on a much larger scale in space [...]
>
> Imagine for a moment that this is possible. The small pulleys would
> disengage and shoot away (or explode perhaps) from the cable just before • the
> object hit them. This would correct the course of the object. ex: It was
> going left, now it's going up and to the right, on its way to the next
> pulley.
This is where the force equations will hit you hard :-)
The next pulley will suddenly get a great force through the line, and needs
to increase it's thrust to keep in place _and_ change the direction of the
object.
That's microseconds before the cable disintegrates...
Why in the world would you want to use cables and pulleys in space?
--
Anders Isaksson, Sweden
BlockCAD: http://user.tninet.se/~hbh828t/proglego.htm
Gallery: http://user.tninet.se/~hbh828t/gallery/index.htm
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Message is in Reply To:
 | | A space physics question
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| Imagine a winch pulling a rope or cable through a series of pulleys (horizontal) that are staked to the ground. The pulleys are arranged so that the rope makes a zig zag pattern on the ground. There is an object at one end of the cable, being reeled (...) (22 years ago, 28-Dec-02, to lugnet.off-topic.geek, lugnet.space)
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