Journal of the American Society of Naval Engineers, Inc, Volumen31American Society of Naval Engineers., 1919 |
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Términos y frases comunes
aeroplane amount auxiliary bearing blades block coefficient boiler brake horsepower brine BUGATTI Bureau camshaft capacity carbon carried cast cent circular mils coal coefficient coil pressure compression compressor condenser connection cooling crank crankshaft curve cylinder deck degrees F diameter discharge distribution board driving effect efficiency electric engine room exhaust feed feet fitted four-cycle fuel furnace gage gear gudgeon pin guns heat hole horsepower increase inlet installed knots length load lubricating oil machine machinery magneto material metal method motor Naval obtained operating substance orifice pipe piston plate ports pounds produce propeller propeller shaft pump reciprocating engine reduced revolutions per minute scavenging screws shaft ship shown speed square inch steam steel submarine superheat supply surface tank temperature thickness tion tons tubes turbine two-cycle engine U. S. Navy valve vapor vessels vibration viscosity weight welding
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Página 580 - It is by no means enough that an officer of the navy should be a capable mariner. He must be that, of course, but also a great deal more. He should be as well a gentleman of liberal education, refined manners, punctilious courtesy, and the nicest sense of personal honor.
Página 143 - I do not resist the search for them, for no one can do harm, but only good, who works with an earnest and truthful spirit in such a direction. But let us not admit the destruction or creation of force without clear and constant proof. Just as the chemist owes all the perfection of his science to his dependence on the certainty of gravitation applied by the balance, so may the physical philosopher expect to find the greatest security and the utmost aid in the principle of the conservation of force....
Página 583 - An act to provide for the better security of the lives of passengers on board of vessels propelled in whole or in part by steam...
Página 157 - The result of the inverse operations is the consumption of the motive power produced and the return of the caloric from the body B to the body A ; so that these two series of operations annul each other, after a fashion, one neutralizing the other.
Página 158 - If the foregoing reasoning be admitted, we must conclude with Carnot that the motive power obtainable from heat is independent of the agents employed to realize it. The efficiency is fixed solely by the temperatures of the bodies between which, in the last resort, the transfer of heat is effected. "We must understand here that each of the methods of developing motive power attains the perfection of which it is susceptible. This condition is fulfilled if, according to our rule, there is produced in...
Página 764 - Service was 50, while during the last twelve months of the war the average deliveries were 2,700 per month. So far as aero-engines are concerned, our position in 1914 was by no means satisfactory. We depended for a large proportion of our supplies on other countries. In the Aerial Derby of 1913, of the eleven machines that started, not one had a British engine. By the end of the war, however, British aero-engines had gained the foremost place in design and manufacture, and were well up to requirements...
Página 154 - The air is rarefied without receiving caloric, and its temperature falls. Let us imagine that it falls thus till it becomes equal to that of the body B; at this instant the piston stops, remaining at the position gh. (4) The air is placed in contact with the body B; it is compressed by the return of the piston as it is moved from the position gh to the position cd. This air remains, however, at a constant temperature because of its contact with the body B, to which it yields its caloric.
Página 141 - Every body perseveres in its state of rest or of moving uniformly in a straight line, except in so far as it is made to change that state by external forces.
Página 513 - The reason for this becomes apparent when the physical phenomena of the die-casting process are considered. Let us assume that a ring 12 in. (30.48 cm.) in diameter is to be die-cast in a metallic mold around a metallic core. As the molten metal strikes the mold it solidifies. Here a change of state occurs that is accompanied by a reduction in volume, commonly termed shrinkage. Unlike a sand core, the metallic core is not compressible and retains its original size and form so that the shrinkage of...