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| Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition |
| Chapter 5 - Section 1 |
| NAVY PROJECTILES |
| 20-mm High-Explosive Tracer Projectile |
| Fuzing: |
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Basic projectile: Model 1. |
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Modification I: Model 1. |
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Modification II: Model 1. |
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Modification III: Model 2. |
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Modification IV: Model 3. |
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Modification V: Two-piece fuze. (Japanese designation unknown). |
| Weight of projectile (fuzed): 4.51 ounces. |
| Length of projectile (fuzed): 3.10 inches. |
| Length of complete round: Mk I, 5.70 inches*, Mk II, 6.88 inches. |
| Filling: Pentolite (50 percent TNT, 50 percent PETN). |
| Weight of filling: 0.18 ounce. |
| Color and markings: Red over all (modifications indicated by white bands). |
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Remarks: The body of all these projectiles (basic and five modifiactions) contains two cavities separated by a steel septum. The upper cavity contains the H.E. filling, while the lower contains the tracer. The same H.E. filling and tracer mixture are used in all in-stances. Differences between the basic projectile and subsequent modifications are principally in the fuzes and weight of H.E. and tracer filling used. |
* The No. Model and Model 1 projectiles are 0.16 inch shorter than the other rounds. |
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Figure 352 – 20-mm High-Explosive Tracer Projectile. |
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