A cross-section sketch of Bushnell's Turtle.

David Bushnell (1742 - 1824) of Saybrook, Connecticut, was an American inventor during the Revolutionary War. He is credited with creating in 1775, while studying at Yale University, the first submarine ever used in combat, known as the Turtle. His idea of using water as ballast for submerging and raising his submarine is still in use today, as is the screw propeller, which was first used in the Turtle. Download high resolution version (700x1045, 119 KB)Drawing of Bushnells turtle Credit: OAR/National Undersea Research Program (NURP) Origin: http://www. ... Download high resolution version (700x1045, 119 KB)Drawing of Bushnells turtle Credit: OAR/National Undersea Research Program (NURP) Origin: http://www. ... // Events January 24 - Charles VII Albert becomes Holy Roman Emperor. ... 1824 was a leap year starting on Thursday (see link for calendar). ... Old Saybrook is a town located in Middlesex County, Connecticut. ... An inventor is a person who creates new inventions, typically technical devices such as mechanical, electrical or software devices or methods. ... Combatants American Revolutionaries France The Netherlands Spain American Indians Great Britain Iroquois Confederacy German mercenaries Loyalists American Indians Commanders George Washington Comte de Rochambeau Nathanael Greene Bernardo de Gálvez Sir William Howe Sir Henry Clinton Lord Cornwallis Thayendanegea (more commanders) The American Revolutionary War (1775–1783), also known as... Yale redirects here. ... German UC-1 class World War I submarine A model of Günther Priens Unterseeboot 47 (U-47), German WWII Type VII diesel-electric hunter-killer (SSK) submarine Inside of the Argonaute, showing the typical obstructed, tiny space of a post-WWII diesel attack submarine. ... A cross-section sketch of Bushnells Turtle. ... Look up ballast in Wiktionary, the free dictionary. ... A propeller can be seen as a rotating fin in water or a wing in air. ...

While at Yale, he proved that gunpowder exploded under water. With this, he also came up with mine barrage in 1777. He also invented the first time bomb. He combined his ideas in an attempt to attack British ships which were blockading New York Harbor in the summer of 1776 by boring through their hulls and implanting time bombs, but failed every time due to a metal lining in the ships hull to protect against parasites in their previous station, the Caribbean. The Turtle eventually sank^{[citation needed]}. Smokeless powder Gunpowder, whether black powder or smokeless powder, is a substance that burns very rapidly, releasing gases that act as a propellant in firearms. ... Time Bomb Time Bomb is Buckcherrys second album. ... New York Harbor is a geographic trem that refers collectively to the bays and tidal estuaries near the mouth of the Hudson and adjacent rivers in the vicinity of New York City. ...

David Bushnell's Submarine Model is on display in Groton, Connecticut. Waterfront of Groton, Connecticut looking upriver Groton is a town located on the Thames River in New London County, Connecticut. ...

References

• Swanson, June. David Bushnell and His Turtle" - The Story of America's First Submarine. Atheneum. 1991. ISBN 0-689-31628-3

External links

• Virtual American Biographies on David Bushnell
• Inventor of the Week