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| Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition |
| Chapter 4 – Section 3 |
| ARMY MORTARS |
| Type 100 - 81-mm High-Explosive Mortar |
| Weight complete round: 7.52 pounds. |
| Weight main charge: 1.18 pounds. |
| Explosive components: |
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Main charge: TNT. |
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Booster Picric. |
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Propellant: |
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Nitrocellulose and graohite: 58.0 percent. |
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Nitroglycerine: 7.1 percent. |
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Dinitrotoluene: 25.7 percent. |
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Diphenylamine: 0.5 percent. |
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Potassium Nitrate: 8.7 percent. |
| Over-all length (without fuze): 11.78 inches. |
| Length fin assembly: 3.31 inches. |
| Maximum diameter at bourrelet: 3.19 inches (81 mm). |
| Maximum diameter tail fins: 3.19 inches. |
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Color: Black over all with a red tip. A yellow band is painted before the bourrelet. |
| Fuzing: Type 100 instantaneous short-delay mortar fuze. |
| Weapons in which used: |
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Type 97: 81-mm mortar. |
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Type 99: 81-mm mortar. |
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Description: Except for minor details, this shell is similar to the Type 97 81- mm H.E. The cup to receive the fuze gaine is held in place in the booster cup by being fitted into a brass ring which screws into the fuze adapter ring above the booster cup. There is no retaining ring to hold the cartridge in the tail fin section. Instead, the cartridge is held by a friction fit. |
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Figure 304 – Type 100 81-mm High-Explosive Mortar. |
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