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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 1 - Projectiles |
| Section 13 - 1.1-INCH PROJECTILES |
| 1.1-inch A.A. (a) Mk 1 Mods 0 - 28, (b) S.D. 1 |
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Over-all length, inches |
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With nose fuze |
5.8 |
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Without nose fuze |
4.1 |
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Diameter of base, inches |
1.085 |
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Distance base to band, inches |
0.87 |
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Width of band, inch |
1.0 |
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Diameter at bourrelet, inch |
1.095 |
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Filling |
Explosive D |
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Weight of filling, pound |
(a) 0.037 (b) 0.034 |
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Weight of loaded projectile, pound |
0.917 |
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Charge/weight ratio |
4.0% |
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Cartridge Case |
Mk 1 |
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Primer |
Mk 19 and Mods 1, 2, and 3 |
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Tracer |
Divided into two increments and pressed into the recess by hydraulic pressure, the tracer is ignited by the propellant charge from the cartridge case. |
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Fuzes |
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Nose |
Modified Mk 12 Mods 2 and 3 (P.D.F.) |
| Mk 34 and all Mods (P.D.F.) |
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The 1.1-inch A.A. gun is not being further developed in the Navy. |
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The 1.1-inch Mk 1 is not self-destroying; the 1.1-inch S.D. 1 is self-destroying. This is the primary difference between the two projectiles. |
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The Mk S.D. 1 consists of a Mk 1 projectile body modified for self-destruction by drill-ing through the wall between the tracer and H.E. cavities. |
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The Mk 1 projectile may also be issued B.L. & T. for target practice or de-icing. |
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The 28 Mods are to distinguish among contractors. |
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Figure 77. 1.1-inch Projectiles Mk 1 (right) and Mk 2 (left) |
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