Lighter Than Air

On June 4, 1783, in the market square of Annonay, France, Joseph-Michel and Jacques-Etienne Montgolfier inflated a balloon made of sackcloth and paper, thirty-five feet in diameter, and watched it rise to roughly 6,000 feet. It traveled more than a mile before descending. No one was aboard. The brothers were paper manufacturers, not scientists. Joseph had noticed ash rising from a fire and wondered whether the same principle could lift a person.

Four months later, on September 19, they demonstrated before King Louis XVI at Versailles. Passengers: a sheep, a duck, and a rooster. The balloon rose, stayed aloft eight minutes, traveled two miles. All animals survived. The rooster had a broken wing, but that was the sheep's fault.

On November 21, 1783, the first human flight. Jean-Francois Pilatre de Rozier and Francois Laurent d'Arlandes climbed into a wicker basket beneath a Montgolfier balloon and lifted off from the Bois de Boulogne. They traveled five and a half miles in 25 minutes, feeding a fire with straw and wool, carrying buckets of water to extinguish embers on the fabric.

first manned balloon flight by pilatre de rozier and d'arlandes, paris, november 21, 1783. source: wikimedia commons

Ten days later, physicist Jacques Charles flew a hydrogen balloon -- lighter, longer-lasting. Hydrogen dominated for a century. But the Montgolfiers had been first. Ballooning became spectacle, then tool. Balloons carried scientists to altitude and served as military reconnaissance. Fixed-wing aircraft eventually replaced them. But hot air balloons remain the simplest way to leave the ground. No engine. No wings. Just fabric, a burner, and the physics of buoyancy. The Montgolfiers proved flight required recognizing that heated air rises -- and being willing to ride it.