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- Newsgroups: sci.energy
- Path: sparky!uunet!wupost!emory!wa4mei!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec26.173449.15241@ke4zv.uucp>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Destructive Testing Systems
- References: <etc.> <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com> <1992Dec23.015933.24919@erg.sri.com> <51704@seismo.CSS.GOV>
- Date: Sat, 26 Dec 1992 17:34:49 GMT
- Lines: 37
-
- In article <51704@seismo.CSS.GOV> stead@skadi.CSS.GOV (Richard Stead) writes:
- >
- >Depends on what you consider loss. The standard physics environment
- >of no gravity, smooth frictionless plane, no air, etc., says the only
- >energy that is real (not "loss") is that required to accelerate the car
- >initially. That is tiny indeed, but irrelevant. The real world has
- >air, friction, vibration, inefficiencies, etc. The whole discussion
- >of the energy involved to this point, including all the forgoing
- >computations has assumed that the electric vehicle is much more
- >efficient than the gas one. Are there any gas vehicles that
- >can go 600 miles on 2 gallons of gas?
-
- Rutan's Voyager aircraft circled the globe on 200 gallons. That's
- 125 MPG. And most people will acknowledge that aircraft drag can
- be reduced below that of practical autos, and that Voyager couldn't
- be called a practical aircraft for anything but record setting.
-
- Any claim for a practical vehicle that gets over 50 MPG equivalent
- over a 600 mile run, gas, electric, flywheel, whatever, should be
- scrutinized with great care.
-
- Note that the Sunracer style vehicles used in the solar electric
- vehicles races often claim better than 1,000 MPG equivalent, but
- one look at those vehicles reveals they aren't practical transportation.
-
- In the 1970s, Mercedes built a diesel streamliner with a 0.40 cubic
- inch engine that claimed a closed course record of 1053 MPG at an
- average speed of 12 MPH and a total distance travelled of 8.8 miles.
- I think they intended to go further, but something broke off when they
- hit a bump.
-
- Gary
- --
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