Steering gear application in ships We are all familiar with the use of a rudder, which helps in turning a ship as and when required. Rudders are the principal system for the entire motion and control of the ships. But we mustn’t forget that the entire rudder action is dependent on another pivotal system called the […]
Problems found in steering gear system of ships A vessel, under pilotage, departed a port in ballast and was down bound in a restricted waterway. The engine control was set to bridge control and a helmsman was using manual full follow-up (FFU) steering. At one point a port alteration was requested; however, the rudder angle indicator […]
Turbocharging principles and construction By turbocharging an engine, the following advantages are obtained : Increased power for an engine of the same size OR reduction in size for an engine with the same power output. Reduced specific fuel oil consumption – mechanical, thermal and scavenge efficiencies are improved due to less cylinders, greater air supply […]
Air start valve The valve is fitted into the cylinder head. It is opened by control air from the starting air distributor. The valve shown is from a slow speed MAN-B&W two stroke engine but a lot of modern engines have valves working on similar principles and design. Materials The body of the valve could be […]
Air starting valve of main engine The air starting valve of a marine engine is responsible to start the engine from a standstill or stop position. It also helps in reversing and emergency stopping or crash stopping of the engine if needed. The Air starting valve is fitted at the centre of each cylinder head, […]
Design and maintenance globe valve on ship Globe valve, a type of valve, is commonly used on board ships in places such as bilge suction lines. A linear motion valve, which regulates the flow of the fluid, the valve has a globe (bulbous) shaped body that houses the valve seat and the disc. The general […]
Gate valve on ships A variety of valves are used in the piping and machinery systems of the ship as per the need of the flow pattern of the liquid. All valves used on ships have the basic functionality of regulating the flow of the liquid in the pipes. Valves are used for almost all machinery systems […]
Sulphur Oxides air pollution from ships Causes and Effects of SOx Emission The sulphur oxides emission is due to the presence of sulphur compound in the marine fuels used in marine engines on board vessel. Better the grade, lower will be the sulphur content as it is removed by refining of the fuel. It has also […]
Marine diesel engine performance On ship, it is important to check the performance of the engine from time to time so as to ascertain working condition and fault finding. In earlier days, the performance of diesel engine was taken manually, but with the advancement of technology, automatic monitoring systems are being used. Types of Diesel […]
Achieve efficient combustion in marine engines Marine fuels used in ships are considered of the lowest grade as far as the quality is concerned. Massive engines of the ships consume thousands of litres of fuel each day. Because of such an enormous requirement of fuel, ships are forced to use low grade fuel oil, which […]