Ordnance and Gunnery: A Text-book Prepared for the Cadets of the United States Military Academy, West Point |
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angle armor austenite axis ballistic ballistic coefficient barrel black powder bolt bore breech block breech mechanism bullet burned bursting charge caliber carbon cartridge cementite center of impact chamber clinometer coefficient compression constant cordite corresponding cradle curve cylinder density determined deviation diameter elastic limit elevation equation explosion exterior feet firing pin forging formulas free recoil function fuse grain groove guncotton heat horizontal ignition increased interior pressure jacket kilogram length maximum pressure means metal mortar movement muzzle velocity nitrocellulose nitroglycerine obtained P₁ pearlite percussion piece piston plate plunger position pounds primer prism projectile quantity range resistance rifle ring rotation scale screw seacoast shell shot shown in Fig shrinkage slide smokeless powder spring square inch steel stress surface tabular values tangential target telescope temperature thickness tion top carriage torpedo trajectory trunnions tube V-Vo vertical volume wire yards Z-Zo
Popular passages
Page 602 - Pa Ra Rn Re Rh Rb Ru Sm Sc Se Si Ag Na Sr S Ta Tc Te Tb Tl Th Tm Sn Ti W U V Xe Yb Y Zn Zr...
Page 417 - I/?:?- ls introduced to make the whole area under the curve unity, ( / e^x~/"r'dx = ~fj, thus obviating the necessity of dividing a partial area by the whole area whenever a probability is to be computed. As stated above, the area under any part of the curve divided by the whole area under the curve is the probability that the deviation of any shot will lie between the limits of deviation represented by the part of the axis of A' between the limiting ordinates.
Page 341 - Fig. 148, surrounds a well left in the concrete of the emplace ment. The racer a rests on live rollers on the base ring and is pintled on a cylinder formed by the inner wall of the base ring. The racer supports the superstructure as in the carriage just described. It is held to the base ring by clips c, which engage under a flange on the inside of the pintle. A working platform, or floor, of steel plates is fixed to brackets x fastened to the racer, and moves the carriage in azimuth. The forward...
Page 279 - If the area of the apertures is constant, it is evident that the resistance to flow will be greater as th"e velocity of the piston or the velocity of recoil is greater. Therefore, the pressure in the cylinder, which measures the hydraulic resistance offered, will vary with the different values of the velocity of recoil. If, however, the apertures are...
Page 3 - Combustion is the burning of the grain from the surface of ignition inward or outward or both, according to the form of the grain. The mass is ignited at one point and the reaction proceeds progressively over the exterior exposed surfaces and then at right angles to these surfaces until the entire mass is consumed.
Page 285 - ... that portion of the aperture open to the flow of the liquid ; and we will consider for simplicity that there is but one aperture and one orifice. Let A be the effective area of the piston in square feet, that is, the area of the piston minus the area of the piston rod and aperture. The square foot is taken as the unit of area, because in the velocities involved in the discussion the foot is the unit of length. Let a be the area of...
Page 350 - The recoil cylinders h are trunnioned in bearings fixed to the top of the racer. Bolted to the top of each cylinder is a frame / which serves as a guide for the crosshead o at the upper end of the piston rod.
Page 535 - For higher or lower temperatures add or subtract 1| foot for each degree of Fahrenheit. If a wind blows with or against the movement of the sound, its velocity must be added or subtracted. If it blows obliquely, the correction will evidently equal its velocity multiplied by the cosine of the angle which the direction of the wind makes with the direction of the sound.* If the gun be fired at each end of the base in turn, and the means of the times taken, the effect of the wind will be eliminated....
Page 320 - Figs. 167, 168 and 169, consists of *hree steel cylinders bound together by broad steel bands, the middle band provided with trunnions. The middle cylinder contains the mechanism for the hydraulic control of recoil. Each of the outer cylinders contains three concentric columns of coiled springs for returning the gun to battery. The front end of each of the outer two spring columns is connected to the rear end of the next inner column by a steel tube, flanged outwardly at the front end and inwardly...