P

179 Results
  • Production facilities

    The processing, safety and control systems, utility and auxiliary equipment, for producing hydrocarbon liquid and...

  • Production tubing

    A pipe used in wells to conduct fluid from the producing formation into the Christmas tree. Unlike the casing...

  • Profile

    A side elevation of a ship form.

  • Progressive collapse

    The gradual collapse of the hull girder, involving the spread of elasto-plastic buckling throughout a transverse...

  • Projected area of a propeller

    This is the sum of the area bounded by the outline of the blades when projected onto a plane perpendicular to the...

  • Prompt and thorough repair

    Permanent repair completed at the time of the survey to the satisfaction of the surveyor, therein removing the...

  • PROPAC (propulsion package)

    An integrated mechanical propulsion system developed by Wärtsilä as a single supplier with commitment to lifetime...

  • Propeller boss cap fins (PBCF)

    see POWER-SAVING DEVICES.

  • Propeller clearances

    The distance from the propeller to the hull has a linear influence on the pressure impulses. A reduction of this...

  • Propeller diameter

    The largest possible propeller diameter is preferred in order to obtain the highest possible propulsive efficiency.

  • Propeller excitation forces

    The propeller is a potential source of noise and vibrations in a ship. The vibration of a propeller are strongly...

  • Propeller hub (of CP propeller)

    The hub is bolted to the flanged end of the tailshaft. Without ice class, the hub diameter/propeller diameter ratio...

  • Propeller nozzle

    A circular casing enclosing the propeller. The propeller operates with a small gap between blade tips and the nozzle...

  • Propeller pitch

    The distance that a propeller theoretically (i.e. without slip) advances during one revolution.

  • Propeller rake

    It is the distance at the blade tip between the generating line and the line perpendicular to the propeller axis...

  • Propeller shaft coupling flange

    For connecting the propeller shaft with the intermediate shaft, a hydraulic coupling flange is used.

  • 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...

  • Propeller skew angle

    Skew angle of a propeller is the angle measured from ray “A” passing through the tip of the blade at mid-chord...

  • Propeller surface finish

    A propeller surface finish has big effect on fuel consumption. A surface finish of 70 microRa will add over 4.5...

  • Propeller, screw propeller

    A revolving screw-like device that drives the ship. The screwtype propeller consists of a hub and blades, all spaced...

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