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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 1 - Projectiles |
| Section 4 - 5-INCH PROJECTILES |
| 5-inch Window Projectile |
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Guns used in |
5"/38 |
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Over-all length, inches |
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With nose fuze |
20.0 |
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Without nose fuze |
15.8 |
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Diameter of base, inches |
4.968 |
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Distance base to band, inches |
2.43 |
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Width of band, inches |
2.25 |
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Diameter at bourrelet, inches |
4.985 |
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Filling |
Expelling charge is black powder, flare, magnesium. |
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Weight of filling |
Expelling charge is 2.5 ounces |
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Weight of loaded projectile, pounds |
Load Mk 1 Mod 1 - 53,9 (approx.) |
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Load Mk 2 Mod 0 - 54.6 (approx.) |
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Load Mk 4 Mod 0 - 53.0 (approx.) |
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Cartidge Case |
Mk 5 |
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Primer |
Mk 13 and all Mods |
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Fuzes |
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Nose |
Mk 63 Mod 0 |
| Mk 18 Mods 2, 3, and 4 | |
| Mk 50 and all Mods | |
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Projectile Body |
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| 5-inch III. Mk 30 Mods 5, 7, and 8 | |
| 5-inch III. Mk 44 Mod 1 |
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Window Load Mk 1 Mod 1: Consists of about 13,800 aluminum foil strips, each 8 in-ches long, 3/16 inch wide, and 0.00025 inch thick, backed on either side by 12 pounds of tissue paper, solid glued. The strips are stacked within four-section cylindrical wood form, which is encases in a split steel sleeve, the whole inserted into the projectile ca-vity. |
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Window Load Mk2 Mod 0: Consists of 19 rolls of aluminum foil stacked within a split steel sleeve. Each roll contains continous foil 600 feet long, ½ inch wide, and 0.0009 inch thick. One end of the foil is attached to a cardboard disc by a rayon leader 15 feet long, insuring streaming out of the foil roll. The foil rolls, with their cardboard discs, are each encased in a split retainer ring, forming a load unit. The units are separated by alu-minum discs when loaded in the split sleeve. |
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Window Load Mk 4 Mod 0: Consists of two stacks of 13,800 aluminum foil strips, each stack separated by an aluminum disc. Each strip is 5.1 inches long by 3/16 in wide. The strips are stacked within two four-section cylindrical magnesium forms, which are encased in a split steel sleeve. |
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Operation: The explosion of the black powder ejection charge, initiated by the fuze, exerts a pressue against the baffle plate and forces the split steel sleeve, window load, and base plug out of the base end of the projectile. |
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Figure 39. 5-inch Window Projectile – Window Load Mk 1 Mod 1 |
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Figure 40. 5-inch Window Load Mk 2 Mod 0 |
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Figure 41. Window Load Mk 4 Mod 0 |
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