Transmission Loss 3 : The difference between output horsepower and input horsepower. It may conveniently be expressed as percentage of input horsepower. (Bul D10)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}