underwater propeller

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A Submarine's Propeller vs a Boat's Propeller: What's the Difference? When it comes to marine vessels, both submarines and boats rely on propellers to move through the water. But what sets these two types of propellers apart? Let's dive in and find out. Submarines are designed for underwater operation, so their propellers need to be able to handle the pressure and corrosion that comes with being submerged in saltwater or freshwater. Boat propellers, on the other hand, operate at the surface and don't have to contend with the same level of pressure. A submarine's propeller is typically made from a durable metal alloy that can withstand the harsh conditions underwater. The blades are also designed to be very efficient, allowing the submarine to move quickly and quietly through the water. Boat propellers, by contrast, are usually made from a lighter material such as aluminum or fiberglass, which makes them less expensive but also less durable. In terms of design, submarine propellers tend to have a more complex shape than boat propellers. This is because they need to be able to change pitch and direction quickly in order to maneuver through the water. Boat propellers, on the other hand, are typically designed for straight-line propulsion and don't require the same level of agility. Overall, while both submarine and boat propellers play a crucial role in their respective vessels' operation, they serve different purposes and have distinct characteristics that set them apart.