...Railway artillery - Personal Page of GENE SLOVER

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plate is bolted to the first shelf of the pit. This plate is 12 centimeters
thick by 1 meter in width and to its outer edge. plate 509, is
bolted a traversing arc made of 3 angles and a :«lries of 5-centimeter
steel pins. The star t.raversing pinion, 21 centimeters outside diameter,
meshes with this ra('k and is driv(>ll by either the motor or the
hand mechanism. The .radius to the conter of the traversing rack
is 10.439 meters.
792. CARRIAoE.--The carriage is entirely of structural steel, plate
506. It is of the front pintJe type, the front being carried on stool
bans. The hall path is 2 meters in diameter and the balls 15 centimeters
in diameter. It is assumed that some provision is made for
direct contact hetween the racer and base to transmit the horizontal
component of the force of recoil into the foundation. It was not
possible to soe the details of construction to confirm this supposition.
Examinltion of some other carriages of similar design indicated that
at least in some cases the racer was simply permitted to climb the
balls when the gun was fired, no provision being made for positive
contact. As noted under "Traversing mechanism," the rear of the
carriage is supported on two rollers 96 centimeters in diameter.
These rollers have a face of 23 centimeters and are carried on stet>J
spindles 21 centimeters in dia.meter. The distance between the centers
of these journal