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Re: [PSUBS-MAILIST] Unusual propulsion system

On Sat, 19 Aug 2000 18:38:25 EDT, TeslaTony@aol.com wrote:

> What is all of your takes on this?

For a full-size fish sub, I don't think Nitinol would cut it. Its too slow,
because it has to cool down in order to contract. I don't think you could
actually put the wire in water to cool it that way. The typical cycle time
is 2 seconds contraction, and then 12 seconds to contract.

Check out http://www.draper.com/tuna_web/vcuuv.htm to see someone who has
done a relatively large fish AUV (8 feet long, 300 lbs) using hydraulics.

They've even got a pretty cool online video of the thing swimming...

Later,
Jon

--------------------------------------------------------------
   Jon Hylands      Jon@huv.com      http://www.huv.com/jon

  Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
           http://www.huv.com