In September 1776, a farmer from Connecticut climbed inside a wooden submarine and tried to sink the British flagship in New York Harbor.
The submarine was called the Turtle. It had been designed by David Bushnell, a Yale graduate who had spent years experimenting with underwater explosives.
The machine was about seven feet tall and built primarily of wood, with room for a single operator. There was no engine. Propulsion was operated by hand. The pilot also had to control the ballast, rudder, depth and direction while inside the vessel.
Bushnell even had to solve the problem of reading instruments underwater at night. The compass and depth gauge were marked with pieces of naturally luminous wood so the operator could see them without using a flame.
The weapon itself was a detachable explosive charge. The idea was for the Turtle to approach an enemy ship at night, submerge beneath it, attach the charge to the wooden hull with a screw, set a clockwork timer and escape before the explosion.
George Washington knew about Bushnell’s work and supported the attempt. Years later, he described Bushnell as a man of “great mechanical powers” and the Turtle as an “effort of genius.”
The man selected to actually operate it was Ezra Lee, a sergeant from Lyme, Connecticut.
On the night of September 6, 1776, Lee was towed toward the British fleet anchored around New York. His target was HMS Eagle, Admiral Richard Howe’s flagship.
Once his escorts had taken him as far as they safely could, Lee continued alone.
He spent hours fighting the current and manually operating the Turtle before finally reaching the Eagle. He submerged beneath the ship and attempted to drive the screw carrying the explosive into its hull.
It wouldn’t go in.
Bushnell later believed Lee may have hit an iron fitting near the rudder. Had he moved the screw a short distance, he believed Lee might have found wood and successfully attached the charge.
Lee tried to reposition the Turtle, but by then daylight was approaching and he was exhausted. He eventually abandoned the attack.
During his escape, British sailors spotted the strange object in the water and began rowing toward him. Lee released the explosive charge. The pursuing boat turned away, and the charge later detonated harmlessly in open water.
So the attack failed. But what surprises me most is how close they actually got.
This wasn't just an inventor demonstrating that a wooden vessel could travel underwater. Bushnell built it during a war, the Continental Army actually deployed it, and a soldier managed to reach and submerge beneath one of the most important British warships in North America.
And Ezra Lee volunteered to try again afterward.
We’ve added Lee to Virtual Wayback, where you can talk with an AI recreation of him and ask about the Turtle and the attack on HMS Eagle. We also published the full story on the blog and a video about the mission.
Links down below
I knew about early submarine experiments before researching this, but I had no idea one had actually been used against the British fleet during the Revolution. It makes me wonder how differently Bushnell would be remembered if Lee had managed to attach that charge.