Torque rise is what most people are actually talking about when they say torque/lugging power or get thinking that a 5HP electric motor makes more power than a 5 HP gasoline motor. Compare a two stroke Detroit diesel to a four stroke Cat of the same HP. The Detroit will up shift through the gears and is still pullIing hard when it hits the max rpm governor. The Cat as it approaches redline is falling flat and running out of "pulling power as volumetric efficiency is rapidly dropping as rpm increases. The airflow path and cam timing can not fully fill the cylinders. Take any short cam timed, small port engine and dyno the rapid drop in torque as it approaches peak HP rpm. Thus also a very rapid and pronounced torque rise as the engine is lugged down from peak HP rPms.
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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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