Posted by rustyfarmall on January 06, 2014 at 14:28:59 from (208.126.186.41):
In Reply to: HP vs Cu. In. posted by Just Another Old Geezer on January 06, 2014 at 14:12:29:
Also, keep in mind the horsepower of the older tractors was measured at either the drawbar, or the pto, or at the belt pulley. In other words, the horsepower was measured at the point where the work was being done.
Not so today. The engines of today have the horsepower measured at the flywheel, and NO adjustments are made in regard to horsepower losses through the drive train.
As an example, way back when in auto mechanics classes at the community college, we had a floor dynamometer. You drove the whole car onto that machine, strapped it down, and then put the car through its paces. The horsepower was measured where the rear tires "met the road"
The small block V8 in my Chevy was rated at 195 horsepower and it ran extremely well, but could muster up only 60 horsepower on that dynamometer.
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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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