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| Japanese Explosive Ordnance – Bombs, Bomb Fuzes, Land Mines,
Grenades, Firing Devices and Sabotage Devices |
| Chapter 1 – Section 2 |
| Japanese Navy Bombs |
| No. 80 Ordinary Bomb Model 1 |
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Over-all length: 111 1/2 inches. |
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Length of body: 62 inches. |
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Diameter of body: 17 1/2 inches. |
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Thickness of wall: 3/4 inch. |
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Material of wall: Steel. |
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Type of suspension: Horizontal. |
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Suspension lug: Two guide studs on the bomb body position a carrying band to which a suspension lug is attached. |
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Color and markings: Gray over all. Green nose and tail struts. Two red lines 180° removed along the longitudinal axis of the bomb. New type markings will be found. |
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Length of tail: 49 inches. |
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Width of tail: 24 1/2 inches. |
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Width of tail fins: 10 1/2 inches. |
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Dimensions of tail struts: Length, 3 9/16 inches; width, 17 3/4 inches; thickness, 5/32 inch. |
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Material of tail: Steel. |
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Type of filling: Type 91 explosive (cone is filled). |
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Weight of filling: 770 pounds (approximate). |
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Total weight of bomb: 1,820 pounds. |
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Charge/weight ratio: 41.7 percent. |
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Construction of body: The bomb body is constructed of 1 piece of machined forged steel. A fuze pocket is drilled in the nose. A tail cone is screwed onto an adapter ring which fits into the after end of the body and is held there by 30 flat-headed screws. |
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Construction of tail: Four 1/8-inch steel fins are welded to the tail cone and are braced by a single set of box-type struts. |
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Figure 42 - No. 80 Ordinary Bomb Model 1. |
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