Category: Marine Vehicles Performance.

Angle of heel

Torque calculation

For boats fitted with a rudder, the torque of the rudder or rudders is calculated as per the following formula…

How Does A Rudder Help In Turning A Ship?

Have you ever wondered why all ships have their rudders placed at the aft of their propellers? Why isn’t a rudder placed…

Types of Rudders For Ships

To broadly categorize conventional rudders, there are two types of ship rudders: 1. Spade or Balanced Rudder A spade rudder…

Rudder on Ships

The rudder is used to steer the ship. The turning action is largely dependent on the area of the rudder. The required area of…

10 Factors Considered For Efficient Ship Propeller Design

Over the years there have been significant research and development in the field of propeller designs to ensure safety of…

propeller cavitation

As the propeller turns it absorbs the torque developed by the engine at given revolutions i.e., the delivered horsepower –…

5 Best Practices for Marine Propeller Design

The design of marine propellers, or “props,” involves a series of trial-and-error testing to balance the vessel, engine, shaft, and…

Marine Propellers- Pitch and How to Measure it?

A propeller can be defined as follows: A mechanical device formed by two or more blades that spin around a…

Thrust Bearing

This incident happened on a cruise liner with diesel electric propulsion. The main generator engines are 4 x MAN B&W…

Function of solid fixed pitch propeller

The propeller consists of a boss with several blades of helicoidal form attached to it. When rotated it ‘screws’ or…

What is a ship wake?

A moving ship (or any other object moving at or near the water surface) generates a kind of trace on…