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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.
What else can I help you with?
Who makes a model submarine that can be put in water?
No kits are made for a model submarine that is submersible.
What is the superlative of efficient?
The superlative of efficient is "most efficient."
On Pokemon sapphire where is the submarine?
The submarine belongs to that scientist guy, you're not allowed on, you have to learn dive then find the place they are exploring, but there is a scale model of the sub in the museum.
What was name of the confederat states submarine?
The Confederate States most successful submarine was the H L Hunley
Which choice is most related to submarine?
Periscope
Which is the most efficient gear?
Spur Gear is the most efficient
What is the purpose of a submarine moon pool and how does it enhance the functionality of underwater vehicles?
A submarine moon pool is a hole in the bottom of a submarine that allows for the deployment and retrieval of underwater vehicles. It enhances the functionality of these vehicles by providing a stable and protected environment for them to be launched and recovered, making operations more efficient and safe.
Where do they keep submarine anchors?
Submarine anchors are typically stored in designated compartments within the submarine, often in the aft section. These compartments are designed to securely hold the anchors and ensure they remain accessible when needed. In addition, the design of submarines allows for the efficient deployment and retrieval of anchors while underwater.
What is the comparative for efficient?
More efficient and most efficient are the comparative and superlative forms of "efficient".
Which Ford model car is the most efficient in gas?
Ford is a very reliable automobile dealership offering numerous gas efficient vehicles. Probably the most efficient would be the Ford Escape Hybrid with 34 mpg at $26,640 if you want an SUV, but the Ford Focus with 35 mpg at $14,395 is great if you want a car.
What of the simple machines is the most efficient?
A screw is the most efficient.
What was the submarine made of?
Most submarines were made of steel.
