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 - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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