U. S. submarines in World War II had a top surface speed of around 20-knots. Submerged, their top speed was around 9-knots, although at that speed they would exhaust their batteries after one hour and have to surface to recharge them.
As of 2014, a submarine can travel between 49 and 52 miles per hour. The exact speed depends on the make of the sub and whether it is traveling on the surface or under water.
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The British Rail Class 43 is the world's fastest diesel train with a speed of 148 mph.
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Diesel-electric submarine batteries have become pretty sophisticated and efficient - during WWII, only a couple of days or less between battery charges was the norm. Today, DE boats can go well over 20 days or more between charges, assuming there's no significant battery loading (flank speed maneuvers, etc.)
The difference between diesel and high speed diesel is that high speed diesel has special cleaning detergents added to it. These detergents clean the injectors, which makes the vehicle run better.
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Submarines utilize several forces to navigate underwater, primarily buoyancy and hydrodynamics. Buoyancy allows them to control their depth by adjusting the amount of water in their ballast tanks, making them either sink or rise. Additionally, hydrodynamic forces come into play as the submarine moves through the water, influencing its speed and maneuverability. Propulsion is typically provided by diesel-electric engines or nuclear power, enabling the submarine to travel silently and efficiently.
What is weight of 5000 Liter High speed diesel
The maximum speed a submarine can reach on the surface is around 20-25 knots, which is equivalent to 23-29 miles per hour.
The Intercity 125 operates at a speed of 125 mph in regular service, and has an maximum speed of 148 mph making it the fastest diesel-powered train in the world, a record it has held from introduction to this present day.
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