Brake Horsepower 2

[electricpete]

Can someone explain the term "brake horsepower"?

I am familiar with shaft horsepower which is mechanical output of the motor. Also familiar with fluid power which is the final useful power output of the pump (volumetric flow-rate time differential pressure). How does brake HP fit into this picture?

 

[butelja]

Shaft hp and Brake hp are essentially the same thing. The term "Brake Horsepower" comes from a type of dynamometer known as a Prony Brake Dynamometer. This type of dyno uses a mechanical brake with a torque reacting arm of known length that pushes on a scale to measure torque.

 

[electricpete]

butelja - thanks.