Why fly weights are driven at a higher rotational speed than the engine? * Fly weight equipped governors work on centrifugal force. The centrifugal force acts upwards and the spring force acts downwards. * This difference between the spring and the fly weights is called the governor effect, which is responsible for moving the pilot…
Turbocharger bearing lubrication system – Bearings are either of the ball or roller type or plain white metal journals. – The ball and roller bearings are mounted in resilient mountings incorporating spring damping to prevent damage due to vibration. These bearings have their own integral oil pumps and oil supply, and have a limited life…
Indicator Diagrams, Power card, Draw card, Power calculation INDICATOR DIAGRAMS 1) The propeller is fully immersed. 2) The ship is fully laden at an even keel. 3) The ship is running neither with nor against a head wind or heavy sea. 4) The hull is not fouled by an under growth. If the ship is…
Fatigue of engineering components * Fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. The nominal maximum stress values are less than the ultimate tensile stress limit, and may be below the yield stress limit of the material. * Fatigue occurs when a material is subjected…
Manoeuvring Digram Explained The starting handle controls three micro switches that convey the following signals Stop signal – Instantaneous Start Signal – Instantaneous Run signal – Varying signal STOP Signal: As long as the stop signal has been pressed, it shall keep the control air at 7 bar to pass through and keep…
– Adequate spare parts for the propelling machinery together with the necessary tools for maintenance and repair shall be readily available for use while at sea for safe operation of the vessel. – The SMS of the vessel shall clearly indicate the minimum number of spares and tools required for the safe operation of the…
Microbial Degradation of lubricating oils onboard One of the vessel I served as Second Engineer suffered a sudden microbial degradation and infestation which caused USD 20000000 on engine repair and a 30 days of laid up with further consequent losses. The ship was about 20 years old with no history of Microbial attack on lube…
Ship Aft End Vibration – A report writing This article is furnished as a report writing to your superindent on Aft end vibration and Suggested remedies, From Second engineer Date: -DD.MM.YY Technical Superintendent XYZ Shipping Let Germany, Sub: Aft end vibration and Suggested remedies, From Second engineer M.T. XXXXX XXX Ref: – Your…
