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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. |
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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.). |
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Unperforated cylindrical sticks, approximately 2.1 mm (.079 in.) by 15.75 in., graphited double-base powder. |
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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. |
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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. |
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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. |
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Figure 395 – 12.7-cm Complete Round (Fixed). |
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