Electro Hydraulic Actuators for Ship Special projects that demand the plumbing-free convenience of electric actuators and the large forces of hydraulic cylinders are elegantly served by Passion’s custom electro-hydraulic actuators. Passion’s EHAs provide both motion control precision and protection against shocks and over-loads. Our custom engineered and packaged hydraulic power unit, cylinder, transducer, and controller […]
Shaft Mterial and Vulkans Coupling RATO S Propeller shaft, tail shaft – The aftermost section of the propulsion shafting in the stern tube in single screw ships and in the struts of multiple screw ships to which the propeller is fitted. Propulsion shafting constitutes a system of revolving rods that transmit power and motion from […]
Vessel Lenght Classes and Definition of Vessel Length Overall A vessel’s length class determines the equipment necessary to comply with federal and state laws. SMALL VESSEL CATEGORY DEFINITION Class A less than 16 feet length overall Class I 16 to less than 26 feet length overall Class II 26 to less than 40 feet length […]
Components of Combustion Process Combustion in diesel engines is very complex and until the 1990s, its detailed mechanisms were not well understood. For decades its complexity seemed to defy researchers’ attempts to unlock its many secrets despite the availability of modern tools such as high speed photography used in “transparent” engines, computational power of contemporary […]
Cylinder Combustion Fuel oil is a hydrocarbon consisting of hydrogen and carbon, together with other elements most of which are unwanted. Hydrogen has a higher calorific value than carbon, therefore, more heat may be obtained from fuels containing higher Hydrogen/Carbon ratios. The lower specific gravity of hydrogen than carbon allows a rough rule of thumb […]
Labor Man Hours in Ship Fabrication There are several methods of working out the man-hours (MHR) required for all the above operations. One method is to use the weight of materials, but most shipyard estimating departments have what is known as “norms” to achieve this very important component of estimating the fabrication of ships. Read […]
Main Engine Commisioning in Ship This includes the following main components: HVAC, piping and pumps, electrical and mechanical equipment, along with main and auxiliary engines. This can be carried out by the shipyard personnel, but it is quite specialized. At the offshore construction yard, we normally brought the equipment and systems up to a pre-commissioning […]
Guideline for Electrical Plant on Board With all types of electrical equipment cleanliness is essential for good operation. Electrical connections must be sound and any signs of sparking should be investigated. Parts subject to wear must be examined and replaced when necessary. The danger from a.c. equipment in terms of electric shocks is far greater […]
Piping Fabrication and Installation The piping fabrication isometrics are taken from the design drawing and fabricated to these. The estimate is taken from the drawings in order to ascertain the lengths of pipe, number gaskets and bolts along with the number of fittings and welds. Materials for ships piping are normally cuni-copper/nickel, stainless, and carbon steel, so […]
Engine Room for Ship New Building dan Repair The manufacturers of a modern ship’s main diesel engines such as Wartsila and MAN-B&W have licensed various shipyards around the world to build these engines and install them in their ships hulls. The costs will be pretty well standardized for the building and installation of the engines along with […]
