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Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition |
Chapter 5 - Section 1 |
NAVY PROJECTILES |
12.7-cm (127-mm) (5-Inch) Complete Round (Fixed) |
Case: |
Length: 22.88 inches. |
Diameter of base: 6.66 inches. |
Material: Brass. |
Weight (empty): 16.28 inches. |
The case is crimped tightly into a groove in the base of the projectile by a single conti-nuous crimp. |
Propellant: |
21 DC (type 31 propellant): 8.87 pounds (4.03 kg.). |
Unperforated cylindrical sticks, approximately 2.1 mm (.079 in.) by 15.75 in., graphited double-base powder. |
The propellant sticks are enclosed in a compartmented bag of heavy brownish silk. |
Primer: Mk 2 case percussion primer Model 4. |
Weapons in which used: |
Type 88 12.7-cm/40 dual-purpose gun. |
Type 89 12.7-cm/40 dual-purpose gun. |
This latter is a modern gun, paired in a twin power-driven mount designed especially for antiaircraft aboard ships. It has been found ashore, unaltered, in the characteristic gun-houses mount used aboard ship. |
Special features of this gun and mount are horizontal opposed sliding breech blocks, full power drive, and automatic fuze-setting accomplished as the loading tray moves the round into position to be rammed. The arrangement for loading and fuze-setting and the general plan of the mount corresponds closely to that of the Type 98 10-cm/65 twin mount. |
Figure 395 – 12.7-cm Complete Round (Fixed). |
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