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Article #15731

Re: Flywheel batteries as EV power source

#15731
From: Phil Ngai
Date: Thu, 17 Dec 1992 17:44
26 lines
1419 bytes
In article <1gp6lkINNik@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
>In article <1gp2pdINN680@usenet.INS.CWRU.Edu>, bj368@cleveland.Freenet.Edu
>(Mike E. Romano) writes:
>
>=This flywheel discussion is interesting.
>=I am not an engineer but note it was mentioned that a proper
>=size flywheel can store the energy/power of a v8 engine.
>=
>=What is the simple equation here for energy (horsepower) stored
>=in say a flywheel weighing 200 pounds, spinning at  1000 rpm?
>=My last physics course was in high school.
>
>First:  Horsepower is a unit of power (energy delivered per unit time), not of
>energy.  Second, the amount of energy stored in a flywheel is dependent on the
>geometry of the flywheel as well as its mass and its speed.  The energy stored
>goes as the product of the moment of inertia and the square of the frequency at
>which it's spinning.

Carl:

It's not horsepower that counts, it's torque.

:-)

-- 
My opinions are my own.
Technical Details
Message-ID: <1992Dec17.174409.5628@adobe.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!decwrl!adobe!pngai
References: <1gp2pdINN680@usenet.INS.CWRU.Edu> <1gp6lkINNik@gap.caltech.edu>

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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!decwrl!adobe!pngai
From: pngai@adobe.com (Phil Ngai)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Message-ID: <1992Dec17.174409.5628@adobe.com>
Date: 17 Dec 92 17:44:09 GMT
References: <1gp2pdINN680@usenet.INS.CWRU.Edu> <1gp6lkINNik@gap.caltech.edu>
Sender: usenet@adobe.com (USENET NEWS)
Organization: Adobe Systems Incorporated
Lines: 26