Re: Horsepower Question

Posted by RustyFarmall on March 07, 2007 at 07:26:33 from (66.43.253.11):

In Reply to: Horsepower Question posted by Ben Shipley on March 07, 2007 at 06:46:21:

There is now a post above this one, talking about a McCormick 22-36. In this case, the 36 represented the horsepower measured at the belt, and the 22 represented horsepower measured at the drawbar. Belt horsepower and PTO horsepower are usually the same. Drawbar horsepower will always be less due to the loss realized in the transmission and differential. A sustantial amount of drawbar horsepower can also be lost due to tire slippage.

For what it's worth, the first car I owned was a 1960 Chev. The 283 cubic inch engine was rated at 185 horsepower, but when I put that car to the test on the floor dynamometer at the auto mechanics school, we could measure only 60 horsepower at the rear wheels, and my instructor said that was normal.

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