The general rule is a peak of around 1 ft lb for every cubic inch, give or take. (That number has not changed appreciably since the beginning.) A 450 size car engine generally makes 500 or so etc. Old tractors tend to be in the ball park (usually less) but peak out down around 800 to 1000. The old machines just turned sooo ssslooow... Getting the RPM up to make useful power is an ongoing struggle, but nowadays usable rpm seldom goes over 2500 for efficiency reasons.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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