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All pre-Nuclear submarines were operated underwater by Electric motors connected by to the main propeller shaft. Even today, modern nuclear submarines have an emergency electric motor connected to the shaft as a backup.
The motor was powered by DC Batteries taking up much space in the lower decks of the boat. Prior to the development of the submarine snorkel, older submarines were required to surface and start their Diesel Engines in order to recharge their batteries. Even today, modern submarines typically use a Diesel-generator to recharge the Batteries, as they are crucial to any emergency/casualty situation on board if the situation requires Reactor shutdown or scram.
Modern Diesel-Electric submarines still use the same method of propulsion as the older boats did - electric motors powered by DC batteries that are recharged by Diesel Engines. The difference is that today's battery technology has given newer DE's the capability of much longer submergence times before recharge is required. Where hours were required in earlier boats, weeks can pass before a modern DE needs to recharge.
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What is a submarine's underwater bomb called?
This is an old and a common term. The torpedo has been used since the first submarine's were used in war time.
Where do you get the submarine in Final Fantasy one?
In GTA: San Andreas, if CJ travels along the waterfront near Pier 69 in San Fierro and goes over to the wall by the sea, there is an old submarine sitting in the water called the USS Numnutz. CJ is able to clamber about on top of it, but not enter it
What does a tuna call a can of people?
a submarine? this was an old Don Knotts joke.
What is a personification for a submarine?
Meaning a sentence that personifies one? Example: The old submarine growled reluctantly to life as the officers began to turn the knobs and dials.
How old is the main character in breathing underwater?
Nick Andreas is 16 years old.
Can you visit a submarine in Philadelphia?
YES - you can visit the WW2 submarine USS Becuna in Philadelphia's Penn's Landing park. -there is also an old cruiser, USS Olympia
Does a submarine have a large or small water resistance?
It depends on the submarine type and hull design. Older WWI and WWII Fleet submarines were specifically designed as surface ships with limited submergence capability - they primarily ran on the surface with their diesel engines, and submerged using their battery powered electric motors when attacking a surface vessel. This hull design made gave them a lower water resistance on the surface, but much higher underwater. Their speed underwater was almost half of what they could do on the surface. With modern submarines, the opposite is true. Submarines today are specifically designed for lower water resistance (higher speeds) underwater than they are on the surface. Top speed for most boats on the surface might approach 20 knots, but underwater they can do over 30 knots. The old Russian ALFA class submarines were known to do 45 knots submerged.
What is the most efficient model of a submarine?
Until the advent of Nuclear Power for submarines, which gave them much greater speed capability underwater than on the surface, submarines were essentially designed as low-profile surface vessels with limited submergence capability. As such, their overall design made them noiser underwater and faster on the surface rather than quieter and faster underwater, the hallmark of modern submarine designs. The most hydrodynamically efficient model of submarine is the elongated teardrop shape that is characteristic of most large modern military u-boats. These boats have a rounded nose, a hull diameter that is appropriate to the design objectives of that particular boat, and then the hull tapers down in diameter back past midships to just a few feet around at the aft end where the screw is attached to the shaft. It makes for really good hydrodynamic performance and good efficiency. It's a quiet shape, too, and it's all about the noise, isn't it? Sharp points on the bow make for extreme difficulties in design and add little to nothing to the performance of the hydrofoil. (It's more about cross-sectional area after considerations regarding the shape of the nose, or bow.) Also, as mentioned, a nuclear submarine is operationally efficient because it can operate at sea for extended periods without the need for fuel, and, more importantly, can operate UNDER the water for a long time because the propulsion system doesn't require air - oxygen - as part of its power generating cycle. Lastly, think about this: an old diesel electric submarine, when it is operating underwater using its battery banks to drive an electric motor to turn the screw, is REALLY quiet. A nuclear boat constantly runs pumps and steam turbines while underwater, and these actually make more noise than the electric systems that drive the old boats when they are submerged. Of course, when the old boats surface to run engines to charge batteries, they can be heard for many miles and identified for what they are.
How old is the submarine?
I don't know exactly, but i can say that they were in use by the second world war. According to Wikipedia, they were also used in world war one, so that would date them in the early 1900s.Ans 2 - The original submarine idea was put into practice in 1776 by David Bushnell. His Turtle operated during the Revolutionary war. Modern day submarines as we know them started to take shape around 1890 and since then have continuously evolved.
Why is there a broom on top of a docked submarine?
A broom on top of a submarine, typically attached to a periscope or other mast, is an old Navy custom signifying a "clean sweep", or that the submarine has successfully completed all of its assigned tasks during a special operation.
When was Old Ford Motor Factory created?
Old Ford Motor Factory was created in 1941.
Where can a 12-year-old in California get a job?
in a family owned and operated business
