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John Woodgate
Guest
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 Posted:
Tue Feb 08, 2005 10:28 pm Post subject:
Re: Interesting chart from Lawrence Livermore |
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I read in sci.electronics.design that Keith Williams <krw@att.bizzzz>
wrote (in <MPG.1c72ac2cf33231dc9898f5@news.individual.net>) about
'Interesting chart from Lawrence Livermore', on Tue, 8 Feb 2005:
| Quote: | True, but hardly 5-15%.
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When stopped in traffic congestion for 70% of the journey time?
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
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Keith Williams
Guest
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| Posted:
Tue Feb 08, 2005 10:42 pm Post subject:
Re: Interesting chart from Lawrence Livermore |
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In article <B9uFZUGmiOCCFwAw@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
| Quote: | I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c72ac2cf33231dc9898f5@news.individual.net>) about
'Interesting chart from Lawrence Livermore', on Tue, 8 Feb 2005:
True, but hardly 5-15%.
When stopped in traffic congestion for 70% of the journey time?
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Move.
--
Keith |
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tlbs
Guest
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| Posted:
Wed Feb 09, 2005 2:41 am Post subject:
Re: Interesting chart from Lawrence Livermore |
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I recall reading that range of efficiencies (5-15%) for IC engines
years ago. Perhaps those numbers were for big 8-cylinder
"gas-guzzlers". I can believe that efficiencies have vastly improved
in the past decade or two.
Maybe the LLNL chart is based on those old figures for IC efficiencies.
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keith
Guest
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| Posted:
Wed Feb 09, 2005 8:40 am Post subject:
Re: Interesting chart from Lawrence Livermore |
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On Tue, 08 Feb 2005 12:41:51 -0800, tlbs wrote:
| Quote: | I recall reading that range of efficiencies (5-15%) for IC engines
years ago. Perhaps those numbers were for big 8-cylinder
"gas-guzzlers". I can believe that efficiencies have vastly improved
in the past decade or two.
Maybe the LLNL chart is based on those old figures for IC efficiencies.
|
5% is a low number for a 20s design, much less anything recent. Always
challenge numbers that look silly. A quick web search would show numbers
in the 30s. Web searches are wonderful things.
--
Keith |
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Ian
Guest
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| Posted:
Wed Feb 09, 2005 7:21 pm Post subject:
Re: Interesting chart from Lawrence Livermore |
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"keith" <krw@att.bizzzz> wrote in message
news:pan.2005.02.09.03.51.02.787229@att.bizzzz...
| Quote: | On Tue, 08 Feb 2005 12:41:51 -0800, tlbs wrote:
I recall reading that range of efficiencies (5-15%) for IC engines
years ago. Perhaps those numbers were for big 8-cylinder
"gas-guzzlers". I can believe that efficiencies have vastly improved
in the past decade or two.
Maybe the LLNL chart is based on those old figures for IC efficiencies.
5% is a low number for a 20s design, much less anything recent. Always
challenge numbers that look silly. A quick web search would show numbers
in the 30s. Web searches are wonderful things.
A program on the box the other night quoted figures up to 45% for a |
particular engine (diesel) used in some huge dumper trucks used to
move around spoil in an open cast coal mine in 180 ton loads.
--
Regards
Ian |
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