Tale of the Horsepower Unit
Horsepower. A unit of power. Devansh Malik tells the story behind it and it is very interesting. When the steam engine was invented, it served one purpose only. For 50 years! “(A steam engine) did only one job: pumping water out of coal mines, which flooded quite often. They could only move up and down, which is perfect for a pump but useless for anything else.” James Watt (“the same dude from your physics textbooks”) was a builder of things – barometers, compasses, toys, musical instruments etc. Once, someone asked him to fix a broken steam engine. Those initial steam engines were very inefficient. So Watt decided to both fix it and improve its design. “His version did the same amount of work while burning about 75% less coal. He also worked out a gear system that turned the engine’s up-and-down motion into a spinning one. Which meant a steam engine could now turn a wheel.” This hugely expanded the possible uses and applications of the steam engin...