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- Xref: sparky sci.electronics:21001 sci.energy:6208 rec.autos.tech:16825
- Path: 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
-
- 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.
-