Great! At least someone found a use for it. But its not the power revolution
that CNN pumped it up to be. Wish it was. Thanks for the info
In a message dated 02/25/2000 1:51:13 AM Eastern Standard Time,
skyezacharia@yahoo.com writes:
> Well.... there is a rather interesting application of
> nitinol of which I have heard. It's a cooling fan.
> When it heats up inside of the attic, it heats a belt
> of nitinol wrapped around two pulleys. Each pulley is
> sheathed partially, and the belt is sort of
> twisted.... you'd have to see it, but essentially when
> it gets hot the heat shrinks the metal which causes it
> to tighten it's belt which causes it to try to unkink
> itself, and since the pulleys hold the belt to them by
> their sheaths it can't get unstuck so it untwists at
> the base of the sheath and turns the wheels. The
> wheels turn a fan, which cools the attic by blowing in
> cool air. After a while, it gets too cold for the fan
> to run, so there's no need to shut it off. It
> maintains temperature fairly well, so I've heard.
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