A revised account of the experiments made with the Bashforth chronograph, to find the resistance of the air to the motion of projectiles; with the ... of trajectories according to J. Bernoulli's

by Francis Bashforth

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. ...= 7550 feet = 2517 yards. In the same way it is found from the Table that the velocity of the 7-inch shot is reduced from 1300 to 1100 f. s. in a range 7040-4550 = 3090 feet; therefore the 10-inch shot would suffer the same reduction of velocity in a range 3090 x 0 4164-f-0-2424 = 5307 feet = 1769 yards; where to = 5306 grains. The same law holds good for spherical projectiles. From the Table, (105), it appears that the 15-inch spherical projectile has its velocity reduced from 2100 to 1409 f. s. in a range of 4000 feet, where d12 w = 04898. From this, we find that the velocity of the 100-pr. projectile, where w= 07766, would have its velocity reduced in like manner from 2100 to 1409 f. s. in a range 4000 x 0-4898-7-0-7766 = 2523 feet. From the Special Table for the 100-pr. we find 2528 feet. 107. The following are specimens of my earliest General Tables for spherical and ogivahheaded projectiles, which connect velocity and space, and velocity and time. "A General Table for facilitating the Calculation of the Range "corresponding to a given loss of Velocity of any Spherical "shot1." 1871. 108. "A General Table for facilitating the Calculation of "the Range corresponding to a given loss of Velocity of any "elongated Shot (Ogival Head)2." 1871. The above Tables were to be used as follows. "Let an "elongated projectile of 400 lbs. be fired from a 10-inch gun with 1 Remaining Velocity, &c. 1871, p. 47; and Proceedings of the R. A. Inst. yn. p. 391. 8 Remaining Velocity, &c. 1871, p. 48; and Proceedings of the R. A. Inst. vn. p. 392., "an initial velocity of 1270 f. P., and let it be required to find what "would be the velocity at a distance of 1000 yards = 3000 feet....

30 pages, Paperback

Published September 13, 2013