The American Revolution witness several examples of Yankee ingenuity that astonished the foes of the United States and delighted their friends. David Bushnell while an undergraduate at Yale in 1775 developed the plans for the Turtle, the first submarine used in combat. Among his innovations was using water as a ballast to raise and lower the submarine, a screw propeller to move the Turtle and a time bomb to serve as the weapon of the Turtle.
The Turtle was constructed and in August General George Washington authorized an attack on HMS Eagle, the flagship of Admiral Richard Howe. The attack was made on September 7, 1776. The Turtle was piloted by Sergeant Ezra Lee. The attack did not succeed. On February 20, 1815 Ezra Lee wrote a letter describing the attack to General David Humphreys:
Judge Griswold, & Charles Griswold Esq. both informed me that you wished to have an account of a machine invented by David Bushnell of Say. Brook, at the commencement of our Revolutionary war. In the summer of 1776, he went to New York with it to try the Asia man of war: – his brother being acquainted with the working of the machine, was to try the first experiment with it, but having spent untill the middle of August, he gave out, in consequence of indisposition. – Mr. Bushnell then came to General Parsons (of Lyme) to get some one to go, and learn the ways & mystery of this new machine, and to make a trial of it.
General Parsons, sent for me, & two others, who had given in our names to go in a fire ship if wanted, to see if we would undertake the enterprize: – we agreed to it, but first returned with the machine down Sound, and on our way practised with it in several harbours. – we returned as far back as Say-Brook with Mr Bushnell, where some little alterations were made in it – in the course of which time, (it being 8 or 10 days) the British had got possession of Long Island & Governor’s Island – We went back as far as New Rochelle and had it carted over by land to the North River. – Continue Reading