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Submersibles

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by

Calvin Webster

on 27 May 2015

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Transcript of Submersibles

How does a submersible work
When was the first submarine invented
What are submersibles used for
What artifacts where found on the titanic
What submarine discovered the titanic
What year was the first naval submarine invented
What was the most recent discovery made by a submersible
Submersibles through time
Modern Submersibles
These are some of the artifacts
The 1950's and 60's
Early 1900's
The U.S. Navy’s Holland was built by John P. Holland is a submersible. While submerged this boat is powered by an electric motor and while on the surface, by a gasoline engine. Holland is generally recognized as the "father of the modern submarine." Because it was one of the first modern submersible.
1700's
World war II
Submersibles
By: Calvin, Angel, Blaise, Ethan
The first Submersibles
The first successful submarine
was invented in 1580 by William Bourne.
A submersible is a compact
boat able to go under
water.
The 1980's
In 1715, John Lethbridge created a one-man air tight diving suit, or diving unit. The suit was a large "human-shaped", reinforced, leather-covered barrel full of air. The suit had a large porthole shaped piece of glass at the front so that the diver could see, as well as two water proof sleeves coming out of the barrel, it is unknown how long someone could survive in the vessel without surfacing for air.

In 1776 the first submersible used in naval combat was launched in the U.S. Built by David Bushnell, a Yale student at the age of 31. The sub was 7 feet long and pear-shaped, with a one man crew. The vehicle was run by two hand-operated, screw propellers. The sub-called the Turtle-was deployed to find and destroy the British flagship H.M.S Eagle. Unfortunately for the U.S., the mission failed.
In the second world war submersibles made up less than 2 percent of the U.S. navy. But sank over 30 percent of Japan's navy, and sinking almost five million tons of shipping. World War 2 submersibles were basically regular boats that were able go under water for a limited time. Diesel engines gave them long range and high speeds on the surface. However speed and range were extremely reduces once submerged, where the source of power was from electric motors with very short battery lives.
In the 1950s the U.S launches the first ever nuclear powered submarine the Nautilus which can almost stay submerged indefinitely. Later on in the 1960s the same technology was used to have the Triton stay submerged while going all the way around the world. In 1964 the Alvin sets sail and is the first submarine to ever discover the ocean floor.




In 1986 the Alvin discovers the
ruins of the titanic in freezing arctic
waters. They discovered why it sank,
what the interior looked like and
many priceless artifacts. Some
of the artifacts were a pocket watch,
a candelabra, jewelry and other
household items.
Now, we use submarines for the military, exploration, and research. Some of the most
recent discoveries made by a
submarine is the discovery
of the shell less coral south east of Tasmania.

Quiz
1580 to 2015
How submersibles work
A very important function of all submersibles is the ability to rise and sink upon command. Submarines have ballast tanks and auxiliary, also known as trim tanks. These tanks can be filled and emptied of water and air upon command. When the submarine is on the surface, the ballast tanks are filled with air and the submarine's overall density is less than that of the water around it.
The End
Full transcript