A engine will burn fuel in proportion to the load (horse power) it is operating at. This is called Brake Specfic Fuel Consumption and is given by the Pounds per Hour Fuel Consumed divided by Observed Horse Power. As a rule of thumb, for gasoline engines I use a BSFC of 0.4 and for diesel engines a BSFC of 0.3. There are no doubt better numbers but I have used these for a long time and they are easy for me to remember.
For example; a gasoline engine operating at 15HP could be expected to use approximately 6 pounds of fuel for every hour it operated at that load. A diesel engine operating at 15 HP could be expected to use approximatey 4.5 pounds of fuel for every hour it operated at that load.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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