Historically, burning ethanol in 4 stokes engine was first developped in
the USA at the beginning ot 20th century.

Early days tractors and other farming equipments were powered by 4
strokes ignition engines designed to run on alcohol (ethanol) that was
locally produced from corn...
This quite successful development ended abruptly with enforcement of
prohibition and the carburettors of those engine were transformed to use
gas.
For some of these engines, a special spacer had to be fitted between
cylinder block and heads to reduce compression ratio that was too high
for the low octane gas of these days.

In Europe mecanization of farming came later, without this ethanol period.
Nowadays, there is a little development of "crude vegetable oil" (ie
locally produced colza oil) burnt pure or mixed in diesel oil by farming
equipment diesel engines.



   Philippe DEJEAN


Making fuels for use in engines from food products is counterproductive.
Corn is better used to feed people or cattle and pigs. Used oil from deep
fryers as it is a method of recycling. Used directly as new vegetable oil
to produce bio-diesel is dumb. Same thing using corn to produce ethanol.
The methanol I wrote about is produced from natural gas. Now if more
attention is devoted to producing ethanol from switch grass, camel grass,
or the wood in brush piles that is a byproduct of clear cut logging you are
using products that have minimal other use to produce a sellable and useful
commodity. Brush piles burn in a very dirty manner and are thus 100%
pollution. If they were to be chipped and then used to make into ethanol the
digested leftover product could then be used to fuel a power plant or for
fertilizer. Now the pollution is spread over more end uses.

Dale Davies




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