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 - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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