Miscellaneous Papers on Mechanical Subjects: Guns and SteelLongmans, Green, Reader, & Dyer, 1873 - 81 strán (strany) |
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12-pounder breech-loading gun 20 inches absolutely sound accuracy air cells angle of elevation armour plate axis axle barrel bearing surface breech block bursting charge calibre cast iron charge of powder compressed steel cylinder diameters in length diameters long Enfield rifle enlargement experiments FIELD CARRIAGE figure of merit flat flat-headed projectile fluid fluid-compressed steel gave a range grooves Hythe inch thick increased ingot iron plate long projectiles Lord Hardinge Lord Panmure Mean deflection Mean range metal minimum diameter muzzle obtained ounces penetration polygonal powder chamber powder charge pressure range and deflection range in yards recoil rifled guns rotation rounds fired screw screw thread SECTION shell weighing Shoeburyness solid shot sound ductile steel Southport steel bullet stud system tensile strength tons trajectory trials trunnion tube turn in 20 turn in 78 twist variation in range water line Whitworth 9-pounder Whitworth and Enfield Whitworth rifle windage Woolwich wrought iron
Populárne pasáže
Strana 26 - newspaper, dated 23rd April, 1857 :— " For the last few days a very interesting and important series of experiments has been in progress at the Government School of Musketry, Hythe, in order to test the comparative merits of these two rifles. The trial, which was of the most searching and impartial character, was conducted by Colonel Hay, the able head of the school, and has terminated in establishing beyond all doubt the great and decided superiority of Mr. Whitworth's invention. The Enfield...
Strana 27 - These are great results to have achieved, and amply justify the forethought of the late Lord Hardinge in securing the services of so eminent a mechanic as Mr. Whitworth for the improvement of the rifle. Until he took the subject in hand, the proper principles for guidance in the construction of the weapon had not been accurately determined.
Strana 27 - ... would appear from these figures that at 500 yards, in 10 shots, the Manchester rifle has a superior accuracy of 1'87 of a foot; at 800 yards, 3-11; at 1,100 yards, 5-63; and at 1,400 yards and upwards the Enfield weapon ceases to afford any data for a comparison. In penetration, the results obtained have been equally decisive; the Whitworth projectile 'with the regulation charge of -powder going through 33 half-inch planks of elm, and being brought up by a solid oak bulk beyond, while the Enfield...
Strana 24 - Government in 1859 that the bore of my rifle was too small for a military weapon. Compare with this the report of another Committee of Officers made in 1862, " tliat the makers of every small-bore rifle, having any pretensions to special accuracy, have copied to the letter the three main elements of success adopted by Mr. Whitworth, viz., diameter of bore, degree of spiral, and large proportion of rifling surface...
Strana 69 - ... The powder chamber is enlarged in diameter and reduced in length, being 2^ diameters long, and containing a charge of 50 per cent, more powder than the service charge of a muzzle-loader. There is also a slightly enlarged shot-chamber to ensure ease in loading. The enlargement of the shot-chamber permits of the reduction of the windage in a degree which could not otherwise bo attained.
Strana 62 - the 12 studs ' of the 9-inch Palliser projectile have a circumferential area of 18 ' inches for supporting the shot, but the area of the sides of the six rear ' studs, by which the rotary motion is given, is only 1/6 inch. No...
Strana 68 - An enlargement of ,;•,,, ,-tli of an inch is thus discernible* called block guides. The faces of the block guides are grooved with a number of parallel grooves, the upper and lower surfaces of the block being similarly formed, and inclined at a very small angle to a plane perpendicular to the axis of the gun, thus forming a portion of a screw thread which would be traced upon a cylinder of extremely large radius. These threads constitute what may be called a
Strana 35 - The projectile with tapered rears is the best for flight in all cases, but the increase of range produced by the taper is not important at low elevations. The advantage increases in proportion to the elevation. In the longest ranges a shot with a taper rear will range upwards of a mile farther than one that is parallel; it is, therefore, very desirable to use it for long ranges.
Strana 67 - T^§^th of an inch in extent, may be ascertained. - If there be no enlargement, the powder charges may be gradually increased until a slight enlargement has been produced. The real strength of the gun is thus positively ascertained, and should be recorded and stamped upon each gun. This would give confidence to the gunner, and would act as a check upon those engaged in the manufacture.