Schneider-Canet 120mm field howitzer
type O.C. 120 N° 2
I. General properties
The power is established by means of a
The mobility is very high due not only to
the little weight of wagons and carriages.
The steadiness on firing is provided by
the size of the recoiling body, and the length of the recoil. The traversing
gear shifting on the axletree bed suppressed the entire systemic component
which tends to deregulate the traversing.
The return in firing position is always
complete under the highest angles by means of the force of the pneumatic
recuperator, as well as soft, constant and without shock thanks to the action
of the check buffer assures a return in firing position regular and without
shock. The leakage of the air is impossible; since the air recuperator-tank
is arranged like a bottle filled half with water, and half with liquid, and
resting on its top.
The safety on fire is complete; the
mechanical safety-pieces of the breech prevent any trouble.
The protection of the gunners is
perfectly assured thanks to the gun-shield.
Gun-body hooped to the muzzle
composed by a tube and two jackets.
Breech with eccentric screw mechanism, interrupted
threads, opening with an uninterrupted single action of the hand-lever,
fastening automatically with a perfect closing and opening in order to make
easy the loading. The cartridge case is automatically ejected when the breech
Loading tray lodged in the breech
recess, in order to prevent the coming back of the ammunition placed in the
chamber, when the howitzer is loaded at high angles.
Repeat firing device with hammer and
mechanical safety arrangements against 1) the slipping of the breech when the
shot is fired; 2) prolonged fires; 3) premature fires; 4) fires before the
breech is closed.
Sleigh composed by a block of forged steel, where
the housing for the buffer, the run-out and the air run-out tanks are
Recoil hydraulic buffer separate from the
run-out, and containing the check buffer.
Return cylinder with air run-out tanks,
requiring only couplings watertight to the liquid.
Cradle of stamped steel sheet carrying the slides
which guide the howitzer during the whole length of the recoil. This long
guidance prevents the lateral shifting of the howitzer during the recoil.
Elevating gear composed by a train of
gears driving toothed arc attached to the cradle.
Sighting gear with tapered cone shaped
drum and goniometer, which enables to correct the angle of sight and the
difference of level of the wheels.
Carriage of stamped steel sheet,
composed by the head of the carriage, the trail, and the trail-end.
Seat for the aimer.
Traversing on axletree bed.
Trail spade composed by a fixed ploughshare in forged steel for firing in rocky ground, and a
wide moveable part, in steel sheet, for firing in ordinary ground.
Wooden wheels with tyres and naves of
Gun-shield made by steel sheet of
the French artillery type.
Two connecting travelling brake, fixed to the
top of the trail, and engaging in a sound cross-piece placed in the backside
of the cradle, and in a remote point of the trunnions, offering a great
firmness to the mooring of the wheels.
Wheel-brake with screw, and wide
Gun and wagon limber of the same kind, with cases
for 10 full charges, and knapsack-rack with grid to carry the gunners’ luggage.
Armoured wagon body tip-up type, carrying 24
Separated ammunition composed by loaded
cartridge-cases, and projectiles lodged in cells.
Cartridge-cases loaded with pure
nitrocellulose powder made in
Thin-walled high explosive shell equipped with
detonator, and loaded with high explosive.
Shrapnel with charge at the bottom
equipped with time and percussion fuze.
Fuze-setter for a quick and exact
setting time and percussion fuzes.
III. Numerical references and data
This is the
translation of an advertisement of the French firm Schneider-Canet published
in 1913 (SCHNEIDER & CIE. Obusier
de campagne à tir rapide de