Hi Craig
On (24 Oct 97) Craig Healy wrote to All...
 CH> a modified Lister engine.  He claims better overall efficiency
 CH> for the gas unit - around 93%.  Diesel is about 90%.
                               ^^                    ^^
I hasten to say, I am not an engine expert. But am certain, that those
efficiency figures are grossly overstated. For an engine there is only one
accepted formula for efficiency and that is
(100 times [Energy Output divided by Energy Input])  percent.
For practical engines the usual value is way below 50%, most of the fuel 
eing
wasted out the exhaust and thru the radiator.
The guy who claims 93% is maybe a salesman, with a weird definition of
Efficiency. Like the weight loss clinic who reduce a woman's size by 18 
inches:
1 inch off the neck, 3 inches off each thigh, 6 inches off the waist and 8
inches off the hips- an overall reduction of 18 inches!
Oh yes, and the wallet gets greatly reduced too! ;-)
Cheers.........ALEC
... ...Starting from a conclusion is bad research [John Harrison, Dunblane 
SCT]
--- PPoint 1.92
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