I've seen (in the same field) a 70HP tractor handle 5X16"'s (@ relatively low speed and a LOT of ballast) and a 60HP tractor struggle with 3X16"'s.
Some plows are designed as deep draft bottoms, then there's mounted plows, pull type, and semi mounted... Some brands have different contours to the moldboards, which will pull harder/easier than others.
My dad and his brother owned IDENTICAL 4020's back in the '60's. Both dynoed 98hp at same rpm. Both weighted the same. With same EXACT plow (145H Deere 5X16) dads tractor would walk off and leave my uncles tractor. The ONLY difference was the brand of tires on the 2 tractors. That made dads tractor SEEM to have more ability to pull a load.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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