- The amount of power that needs to be applied to the compressor shaft to facilitate proper air compression and delivery. BHP usually refers to the amount of power delivered at the motor output shaft and before the transmission. It is measured using an instrument called a dynamometer, which is a mechanical or electric braking device. Thus, the BHP does not account for the internal losses in the driver (motor or engine).
BHP = 2 * π * N * Tsh / 33,000
Where:
– N is the engine speed in revolutions per minute (RPM)
– T is the driver torque in pound-feet (lb-ft)
(See also, “Horse Power”)