: How is the Horsepower of a car measured? And how did they measure it for the firsts motored cars?

Question

: How is the Horsepower of a car measured? And how did they measure it for the firsts motored cars?

In: Engineering

Answer 1

A dynamometer is a torque meter and speedometer in one. It is attached to the wheel of a car while the car is suspended in the air. Then, the car starts to spin the wheel. The dynamometer measures the torque and the speed. Finally, power = torque * speed