The End of the Horse

Karl Benz took his Motorwagen for a public drive on July 3, 1886, in Mannheim, Germany. Three wheels, a single-cylinder engine, a top speed of about ten miles per hour. It looked like a carriage that had lost its horse. The steering was done with a tiller, like a boat. It ran on gasoline, a waste byproduct of petroleum refining that you bought at pharmacies in small bottles.

Benz was a mechanical engineer who had spent years building stationary gas engines. The challenge was not just making an engine small enough to move itself but designing a vehicle where engine, transmission, chassis, and steering worked together as an integrated system. The Motorwagen produced about two-thirds of a horsepower. Enough to move at a walking pace. Neighbors thought he was mad.

bertha and carl benz in a benz-viktoria, 1894. source: wikimedia commons

What made the automobile revolutionary was independence from biology. Horses get tired, sick, hungry. They have moods. An engine is a mechanical problem you can understand completely and fix with tools. The automobile turned personal transportation into an engineering discipline rather than an agricultural one.

His wife Bertha understood the potential better than he did. In August 1888, she drove the Motorwagen 66 miles from Mannheim to Pforzheim without telling Karl, clearing a blocked fuel line with her hat pin and getting a cobbler to reline the brake pads. The publicity convinced people automobiles were practical. Within a decade, dozens of companies were building cars. The core insight -- that personal mobility could be a designed artifact rather than a partnership with an animal -- began on a street in Mannheim with a three-wheeled machine that barely worked.