This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...length in recoil, in feet. x = the recoil in feet at any point. J = the initial velocity of recoil, feet per second. V = the velocity of recoil at any point.v. v = the velocity of the liquid through the aperture. -o = the total area of the grooves, sq. ft. u = the total area of the grooves at the point x. A--the height ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...length in recoil, in feet. x = the recoil in feet at any point. J = the initial velocity of recoil, feet per second. V = the velocity of recoil at any point.v. v = the velocity of the liquid through the aperture. -o = the total area of the grooves, sq. ft. u = the total area of the grooves at the point x. A--the height of a column of water such that P = phA, P /being the'constant pressure in the cylinder. Then, disregarding friction, / V = 2gA, but, vu, --V, A; P PWA f hence F=---................ (!) / W by which the total area u of the developed groove can be computed for any distance x. The depth of the grooves being established, the ordinates of the developed groove may be computed from (3). From (2), /=; and it is evident that, assuming the whole JSl work to be done by the hydraulic recoil check, the total length of the recoil is independent of its velocity, and consequntly of the powder charge. The time only varies. 74. To Determine K, the Initial Velocity of Recoil.--Sladen, in "Principles of Gunnery," Chap. II. p. 17, gives the fol lowing formula for the initial velocity of recoil: V"=--------v, in which V" = the;velocity of recoil in f. s. when the projectile leaves the bore. V = the muzzle velocity of the projectile. w = the weight of projectile in pounds. u/= the weight of the charge in pounds. W"= the weight of the gun and carriage in pounds. C--co-efficient determined by experiment. In the case of high-powered guns, when the weight of charge is one-half the weight of the projectile, the value of C may be taken as unity for the work of computing the pressure, length of recoil, and area of aperture in the case of hydraulic cylinders. If the weight of charge is one-quarter the weight of projectile, take C=; and when the ...
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