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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 1 - Projectiles |
| Section 11 - 20-mm PROJECTILES |
| 20-mm A.A. H.E., H.E.-I., and B.L. & P. Mk 3 Mods 1 - 64 |
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Over-all length, inches |
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With nose fuze |
3.275 |
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Without nose fuze |
2.625 |
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Diameter of base, inches |
0.74 |
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Distance base to band, inches |
0.374 |
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Width of band, inch |
0.16 |
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Diameter at bourrelet, inch |
0.78 |
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Filling |
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H.E.: |
0.0243 lb. tetryl or pentolite |
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H.E.-I.: |
0.0072 lb. incendiary mix; |
| 0.0171 lb. tetryl or pentolite | |
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Weight of loaded projectile, pound |
0.2714 |
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Charge/weight ratio |
8.9% |
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Cartridge Case |
H.E.: Mk 2 H.E.-I.: Mk 2, 3, or 4 |
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Primer |
H.E.: Mk 30 |
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H.E.-I.: Mk 30 or 31 |
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Fuzes |
Nose - Mk 26 Mods 0 and 1 |
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The explosive filling of the H.E. projectile is press-loaded in three equal increments. The H.E.-I. projectile is similary loaded, but the first increment consists of an incendiary mixture, the other two of H.E., either tetryl or pentolite. |
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This round is also issued B.L. & P., with an inert filler and a dummy nose cap. |
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Identifiaction - marking and painting |
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Type |
Color |
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H.E. (Tetryl) |
White |
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H.E. (Pentolite) |
Yellow |
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H.E.-I. (Tetryl) |
Red |
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H.E.-I. (Pentolite) |
Light Pink |
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B.L. & P. |
Dark gray green |
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The many modification numbers are to distinguish between products from different contracts. |
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Figure 75 (Part 1). 20-mm Projectiles. |
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