Posted by Turkeyfoot on August 01, 2021 at 08:16:57 from (174.234.0.209):
In Reply to: Mileage question posted by rrlund on August 01, 2021 at 07:16:45:
With respect to internal combustion or any type of heat engine, the maximum work (highest efficiency) is achieved when all strokes occur under reversible conditions under which each step of the stroke takes place with external pressure and internal pressure equal during each step of the process. This is a requirement that also minimizes the power output (energy per unit time) but does allow one to calculate the maximum efficiency for an engine of any design. So as rpm decreases the engine efficiency (work out divided by energy consumed) will approach the theoretical reversible limit at the sacrifice of power. This discussion is not much use in the hayfield, haha. But I'd project that going at lowest rpm that allows for enough power to sufficiently work your rake should be most efficient but make for a long day.
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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