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Discussion Starter #1
I was wondering, as relates to energy storage, what is the efficiency of a
spring? How much energy do get back out of a spring versus how much it took
to "stretch" it. Like batteries, this would probably vary according to the
rate at which it was performed.
A wind-up car anyone? ;-)

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Discussion Starter #2
Total dependent on the amterial used for the spring and the rate at
which it was wound. With metal there are heat losses.

Wind up spring trolley cars were in fact used for a short time.

Al wrote:
> I was wondering, as relates to energy storage, what is the efficiency
> of a
> spring? How much energy do get back out of a spring versus how much it
> took
> to "stretch" it. Like batteries, this would probably vary according to
> the
> rate at which it was performed.
> A wind-up car anyone? ;-)
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev

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and the melting poles.

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