The Marine Steam Engine: A Treatise for the Use of Engineering Students and Officers of the Royal Navy |
From inside the book
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Page 2
... blades , somewhat resembling a pair of canoe paddles , crossed at right angles . The paddles were driven by an engine of somewhat peculiar design , which , how- ever , approximated to the side - lever engine of a later day . This boat ...
... blades , somewhat resembling a pair of canoe paddles , crossed at right angles . The paddles were driven by an engine of somewhat peculiar design , which , how- ever , approximated to the side - lever engine of a later day . This boat ...
Page 402
... blades when re- volving . The area of this circle is called the disc area of the screw . Pitch . The pitch of the screw is the distance through which the screw would advance in one revolution , provided it turned in a solid nut . Speed ...
... blades when re- volving . The area of this circle is called the disc area of the screw . Pitch . The pitch of the screw is the distance through which the screw would advance in one revolution , provided it turned in a solid nut . Speed ...
Page 404
... blade . The arithmetical mean of all the pitches thus measured , for all the screw- blades , is found , and called the mean pitch of the screw ; but considering the different velocities with which the several sections pass through the ...
... blade . The arithmetical mean of all the pitches thus measured , for all the screw- blades , is found , and called the mean pitch of the screw ; but considering the different velocities with which the several sections pass through the ...
Page 405
... blades , or , what amounts to the same thing , the length of the screw , increases . This is only true within ... blades is 30 per cent . of the pitch . For increases of length between 30 and 75 per cent . , the slip diminishes slowly ...
... blades , or , what amounts to the same thing , the length of the screw , increases . This is only true within ... blades is 30 per cent . of the pitch . For increases of length between 30 and 75 per cent . , the slip diminishes slowly ...
Page 411
... blades , that is their area projected on an athwartship plane , was made about three - tenths of the whole disc area which is the usual proportion for four - bladed screw - propellers . On the first official trial , which was made on ...
... blades , that is their area projected on an athwartship plane , was made about three - tenths of the whole disc area which is the usual proportion for four - bladed screw - propellers . On the first official trial , which was made on ...
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Common terms and phrases
absolute pressure action air-pump angle arrangement atmosphere back pressure bilge blades brass cause centre coal cocks combustion compound engine connected crank crank-shaft curve diameter draught eccentric efficiency evaporation exhaust expansion valve Fahr feed feed-water feet fitted friction funnel furnaces gases gear gun-metal heating surface high-pressure cylinder hot-well hydrometer increased indicated horse-power indicator diagrams iron jacket Kingston valves latent heat length low-pressure cylinders machinery marine boilers marine engines metal motion necessary ordinary orifice paddle-wheel pass pipes piston plates port pounds per square pressure of steam prevent propeller pumps quantity rates of expansion reduced revolutions per minute Royal Navy safety-valves screw screw-propeller sea-water sensible heat shaft ship shown in Fig side slide slide-valve speed square inch steam pressure steam-pipes steel stokeholds stroke suction suitable superheated superheater surface condensers temperature thermal units total heat triple expansion engines tubes vertical weight
Popular passages
Page 32 - ... the quantity of heat necessary to raise the temperature of one pound of water at its maximum density, one degree Fahr., can be made to perform work equal to the raising of 772 Ibs.