15-CENTIMETRE GUN AND
DISAPPEARINGr CARRIAGE.
273
correctly trained on an objective chosen at the side.
Several pieces of ordnance of this type, bullt at the Havre
Works, are fitted with a special elevating gear, which
comprises a crank, a set of conical pinions, and an
■entliess screw, working a toothed wheel that acts on the
left trunnion of the howitzer.
actions, and is fitted with a plastic obturator. The bed-
plate is provided with a roller-path, the balis of which are
maintained at a fixecl distance apart by a circular plate-
ring, in which are cut a series of hollows. It is fitted with
a circular disc for fixing it to the foundations. The slide
consists mainly of two vertical brackets, joined at their
15-Centimetre Schneider-Canet Gun and Disappearing Carriage.
15-Centimetre (5.905-In.) 26-Calibre
appearing Carriage (Figs. 896 and 897).
Gun, on Dis-
Weight of gun 2750 kg. 6,061 Ib.
,, niounting 6500 kg. 14,326 Ib.
,, projectile Muzzle velocity with black 35 kg. 77 Ib.
powder ... 520 m. 1706 ft.
Elevation ... + 15 deg. — 5 deg. + 15 deg. — 5 deg
Training, through 360 deg. 360 deg.
The gun is a general type of Schneider-Canet ordnance
for garrison armament. The breech block opens in three
lower part by a circular platform which revolves on a
set of balis on the bedplate. A clamp holds the rim of the
latter and the front of the slide, preventing all shifting
when the gun is fired. The beam, in which the gun
trunnions are placed, consists of two cheeks stayed
together at the top ; it is movable round a horizontal
axis formed by two hollow drums, which oscillate in
vertical brackets fixed on the platform of the slide.
The gun is, moreover, supported in front of its trunnions
by two jointed rods on a collar placed near the wedge coil