This sport has been around since the early 1920s. A special machine called a dynamometer is what the teams of horses are hooked to. This machine simulates the idea of pulling a weight out of a well. Between what distance the team pulls, the weight on the dynamometer and the time it takes the team to pull 27 1/2 feet, you can figure out horsepower. So what is horsepower and how is it calculated??? You can use this equation: HP = 1/2 (tractive pull) divided by 10 t (t being in seconds it takes to pull 27 1/2 feet). This equation is why the teams try to pull the distance of 27 1/2 feet. And if they do, it's considered a full pull!!!!
So what happens is pretty basic - the dynamometer is set at a starting weight, usually 1500 lbs. Each team has three chances to pull the full distance. If they do, they advance to the next round. Once all the teams have tried at the first weight, those who accomplished a full pull then begin to pull the next weight (which is usually increased by 300 lbs between each round). And so on ..... until the weight on the dynomometer is heavy enough that no team can complete a full pull. That last round is measured in distance that each team pulled.
Now for the visuals!!!
First the teams are brought around and 'hitched' to the dynamometer.







Watch the videos. It's almost like being there. Not really, but at least you can see in action everything we have explained.


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