Ordnance and Gunnery; A Text-Book Prepared for the Use of the Midshipmen of the United States Naval Academy

Ordnance and Gunnery; A Text-Book Prepared for the Use of the Midshipmen of the United States Naval Academy

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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. 1910 edition. Excerpt: ... at the top, so that a cartridge lying in it, is in the middle line of the gun and horizontal. The first cartridge of the belt is stopped in this position, and the belt can be drawn no farther, on account of the rear end of the cartridge bringing up against the feed-roll wall, which is seen in the plate just in rear of the feedwheel; the cartridge cannot cant in the cradle, since the bullet is held by the bullet-guide, which is secured to the inside of the left side-plate just forward of the cartridge-shaped opening. 30. The belt being thus entered, and a cartridge in the feed wheel, the gas-lever is swung by hand through its full arc to the rear and released, when it flies back into the closed position, under the tension of the retracting springs. The backward swing of the lever moves the slide to the rear, as already explained. 31. In the first three-eighths of an inch of motion of the slide, three operations are accomplished: the head of the first cartridge is gripped by the cartridge-extractor and by the cartridge-guides; the bolt is unlocked by the raising of its rear end; and the sear released by the tripper, rises against the hammer. 32. In the next one and one-half inches of motion the mainspring is compressed; at this point the forward lug on the right edge of the slide strikes the feed-lever and begins to move it to the rear. After another seven-eighths inch, the slide strikes the carrier-dog, and at four inches, the cocking is completed, the feedlever is in its extreme position, the cartridge is raised slightly out of the extractor, the trigger and sear snap over the head of the hammer, and the bolt is fully drawn back. 33. The forward swing of the gas-lever draws the slide forward, the first effect being to throw up the front...show more

Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236767225
  • 9781236767226