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- From: olsen@vetmed.cvm.uiuc.edu (Aart_Olsen)
- Subject: Re: Flywheel batteries as EV power source
- References: <1992Dec15.194558.2556@adobe.com> <1992Dec16.192456.6261@news.cs.brandeis.edu> <1goebdINNik@gap.caltech.edu>,<BzE2oz.I4H@ns1.nodak.edu> <1gp8c9INNik@gap.caltech.edu> <BzEsw7.57B@cs.uiuc.edu> <olsen.32.724613003@vetmed.cvm.uiuc.edu>
- Message-ID: <olsen.42.725052409@vetmed.cvm.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: UIUC -- Vet Med
- Date: Tue, 22 Dec 1992 19:26:49 GMT
- Lines: 29
-
- In article <77846@ncratl.AtlantaGA.NCR.COM> mwilson@ncratl.AtlantaGA.NCR.COM
- (Mark Wilson) writes:
- >In <olsen.32.724613003@vetmed.cvm.uiuc.edu> olsen@
- vetmed.cvm.uiuc.edu (Aart_Olsen) writes:>
- >|In article <BzEsw7.57B@cs.uiuc.edu> morrison@cs.uiuc.edu
- (Vance Morrison)
- writes:>
-
- >|>1) Slow down the rate of energy dumping. ...
- >
- >|This is what laboratory ultracentrifuges do. Usually the rotor housing
- >|is contained in a thick bronze casing which "slowly" absorbs the kinetic
- >|energy. I once heard an ultracentrifuge blow, and it sounded like a freight
- >|train for maybe five minutes. Lab centrifuges contain a surprising
- >|amount of energy--even though they have relatively small rotors and big
- >|motors they take quite a while to get up to speed because so much has to
- >|be pumped into them.
- >
- >Do you happen to know how much one of the little beasties weighs.
- >
-
- Ultracentrifuge rotors weigh about 2-4 Kg. They are maybe 15 cm diameter,
- spin at 60-80KRPM. I think the best of them these days develop 800 kilo-
- gravities at the tube ends (the tubes fit in the rotor). They are the best
- technology around, by the way; they are about as massive and rotate as fast
- as current metallurgy reliably allows.
- -----------------------------------------------------------------------------
- Aart M. Olsen University of Illinois at Urbana-Champaign a-olsen@uiuc.edu
- -----------------------------------------------------------------------------
-