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| Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition |
| Chapter 5 - Section 1 |
| NAVY PROJECTILES |
| 14-cm (140-mm) (5.5-Inch) Illuminating Projectile |
| Weight of filled projectile (without fuze): 87.5 pounds. |
| Weight of empty projectile: 67.46 pounds (appromixmately). |
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Weight stamped on rotating band (sample): No data (varies with individual projectiles). |
| Length of projectile (without fuze): 20.3 inches. |
| Diameter at bourrelet: 5.49 inches (139.5 mm). |
| Distance from base to rotating band: 0.59 inch. |
| Width of rotating band: |
| Forward: 1.11 inches. |
| Space: 0.38 inch. |
| Aft: 1.09 inches. |
| Radius of ogive: No data. |
| Filling: |
| Primary ejection charge (black powder): 100 grams. |
| Secondary ejection charge (black powder): 41 grams. |
| Initiating pellet, relay train, and delay are black powder. |
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The ignition compound for the illuminant is a mixture of potassium nitrate, iron oxide, alu-minum, sulphur, and wax. |
| The illuminant is a mixture of barium nitrate, magnesium, and wax. |
| Weight: 31 pounds. |
| Fuzing: Type 91 mechanical time fuze. |
| Weapon in which used: Type 3d year 14-cm/50 gun. |
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Operation: At the end of the time set, the mechanical time fuze fires the initiating pel-let. The relay train transmits the flash to the base of the primary ejection charge contai-ner and ignites the charge. The primary ejection charge expels the canister containing the illuminating charge and its parachute, and also ignites the delay element. A short time after the canister is ejected from the projectile body, the delay element fires the secondary ejection charge which expels the illuminating charge and parachutes and igni-tes the illuminant. Two parachutes, a large one above a small one, suspend the illuminat-ing unit. |
| Burning time, not determined. |
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Figure 404 – 14-cm Illuminating. |
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