The Works Of Messrs. Schneider And Co.

MOUNTING-S FOR 12-CENT., 15-CENT., 16-OENT., AND 24-CENT. NAVAL GUNS. 221 fast with the latter by means of locking grooves, so as to revolve with the main shaft. It will be seen, therefore, that by acting on the handwheel and the disconnecting lever, the gunner can set the gun as required for firing, as both the threadecl sleeves are set in motion alternately to drive their corresponding gear. This mechanism can also be worked by electricity. For this purpose the training shaft is provided at its front end with a conical pinion, which gears into another pinion fitted to the vertical shaft of a dynamo placed on the left cheek of the mounting, and worked either from a battery or with electric current taken from the main transmission wheel, the shaft of which can be connected or discon- nected with either gear by the action of a lever. Weight of gun 5740 kg. 12,651 Ib. ,, mounting ... 5340 kg. 11,769 Ib. ,, shield 980 kg. 2160 Ib. ,, projectile ... ,, service charge (smokeless powder) 40 kg. 88 Ib. 9.7 kg. 21 Ib. Muzzle velocity in service ... 680 m. 2230 ft. Elevation + 20 deg. — 6 deg. + 20 deg. -— 6 deg. Training 360 deg. 360 deg. Mounting for 16-Centimetre (6.299 In.) Quick- Firing Guns (Fig. 750, Plate CXXIX.).—These reprocluce Fig. 746. Firing Tests at the Hoc Proving Grounds. of the ship. When it is required to work the gun thus, the two conical pinions are put into gear, and the hand- wheel is drawn back. The gunner has then only to operate the disconnecting lever in order to train the gun. When the gun is pointed, he fixes the coupling-block in an Intermediate position, the main shaft turns free, the two sleeves remaining loose. Mounting for 15-Centimetre (5.905-In.) 45-Calibre Quick-Firing Guns (Fig. 749, Plate CXXIX.). — This type is a reproduction of the preceding one, but of larger dimensions. It contains similar mechanism for closing the breech, firing and training by hånd and by electricity. Training and elevating are controlled by the same hand- all the characteristics of the 10-centimetre (3.937-in.) 50-calibre guns, but on a correspondingly larger scale. A great number of these guns have been built at Messrs. Schneider and Co.’s Havre Works. Weight of gun ,, mounting ,, projectile Elevation Training 6730 kg. 7230 kg. 45 kg. + 15 deg. — 8 deg. 360 deg. 14,833 Ib. 15,935 Ib. 99 Ib. + 15 deg. - 8 deg. 360 deg. Mounting for 24-Centimetre (9.449-In.) Quick- Firing Guns (Fig. 748b, Plate CXXVIL).—This type of mounting contains practically the same principal elements