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From: "Paul F Austin" <>
Newsgroups: sci.military.naval
Subject: Re: Superdconducting electric motor.
Date: Sat, 2 Jan 1999 20:35:04 -0500

dave pierson wrote in message <76lu5u$hi9$>...
>Its not hard to go over 90%, even 95% efficient in motor or generator design,
>witn NON superconducting materails.  So to get that 5 or 10%, lug
>around a bunch of cryogens, and the material to keep them cold?
>AND, in case of battle damage to the cooler, the superconductivity goes
>I can't see it, myself....

Energy has little to do with it. _Size_ is the key. Lipscombfish had a huge
propulsion motor (rated about 15,000 horsepower) and it dominated the
engineroom. Superconducting motors are a lot _smaller_ that conventional
ones for a given power output.

"An important difference between a military operation and a surgical
operation is that the patient is not tied down. But it's a common fault of
generalship to assume that he is".
Paul F Austin

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