How is the propeller and shaft supported outside the hull of the ship?

How is the propeller and shaft supported outside the hull of the ship?

• A. By a cradle and bearing assembly
• B. By strut and strut bearing
• C. By a housing and linkage
• D. By a bracket and clamp

Answer: (B)

The propeller and shaft are supported outside the hull of the ship primarily by a strut and strut bearing assembly. This setup serves multiple purposes: it provides structural support for the shaft while allowing for smooth rotation. The strut is usually a reinforced component that extends from the hull and provides a rigid connection point for the propeller shaft. The strut bearing, positioned within the strut, minimizes friction and facilitates the rotation of the shaft as it transmits power from the engine to the propeller. This configuration is crucial for the efficient operation of marine vessels, as it helps withstand the forces generated during propulsion and reduces wear on the shaft and propeller assembly. The interaction of the propeller with water creates significant thrust, and the strut ensures that this system remains stable and aligned throughout its operation.

The propeller and shaft are supported outside the hull of the ship primarily by a strut and strut bearing assembly. This setup serves multiple purposes: it provides structural support for the shaft while allowing for smooth rotation. The strut is usually a reinforced component that extends from the hull and provides a rigid connection point for the propeller shaft. The strut bearing, positioned within the strut, minimizes friction and facilitates the rotation of the shaft as it transmits power from the engine to the propeller.

This configuration is crucial for the efficient operation of marine vessels, as it helps withstand the forces generated during propulsion and reduces wear on the shaft and propeller assembly. The interaction of the propeller with water creates significant thrust, and the strut ensures that this system remains stable and aligned throughout its operation.