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- Xref: sparky sci.electronics:21403 sci.energy:6366 rec.autos.tech:17072
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Path: sparky!uunet!destroyer!cs.ubc.ca!uw-beaver!fluke!strong
- From: strong@tc.fluke.COM (Norm Strong)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec22.191900.18233@tc.fluke.COM>
- Organization: John Fluke Mfg. Co., Inc., Everett, WA
- References: <1992Dec16.192456.6261@news.cs.brandeis.edu> <1992Dec16.232521.14672@mtu.edu>
- Date: Tue, 22 Dec 1992 19:19:00 GMT
- Lines: 32
-
- In article <1992Dec16.232521.14672@mtu.edu> cmwolf@mtu.edu (christopher m. wolf) writes:
- }andyh@chaos.cs.brandeis.edu (Andrew J. Huang) writes:
- }>In article <1992Dec15.194558.2556@adobe.com> pngai@adobe.com (Phil Ngai) writes:
- }>2. There are several places for the energy to go during an explosion.
- }>Since the energy is kinetic, a lot of it will end up as particle
- }>velocity. Some will dissipate into the air as air friction (some hot
- }>air as a side effect). A quantity of energy will go into the
- }>mechanical breaking of the flywheel disk itself. Some more will go
- }>into the penetration of the flywheel housing. What residual energy
- }>escapes these will have to be determined by testing.
- }
- }They are supposedly designed within a box held at a vacuum (sp?), with
- }the box string enough to contain them, I thought.
- }
- }>3. You don't need to destroy cars to test the safety/danger of
- }>exploding flywheels. You just take a flywheel, spin it to 10 times
- }>its rated capacity, and give it both barrels of a 10ga shotgun loaded
- }>for elephant. If it explodes, you measure the explosion. If not,
- }>send it to Ralph Nader for further tests.
- }
- }There is a different between shooting it and having it break up though.
-
- Here are the numbers: A flywheel capable of driving a car as far as 10
- gallons of gas in an internal combustion engine, if it ruptures, will
- cause the same damage as a bomb containing 200lbs of TNT.
-
- I'm assuming 28% efficiency for the IC engine and 100% efficiency for
- the flywheel engine.
- --
-
- Norm Strong (strong@tc.fluke.com)
- 2528 31st S. Seattle WA 98144 USA
-