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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 Land Bomb |
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Over-all length: 113 inches. |
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Length of body: 72 inches. |
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Diameter of body: 18 inches. |
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Thickness of wall: 1/2 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: Grey over-all. Green nose and tail struts. Two red lines 180° apart long the longitudinal axis of the bomb. Blue band around the body. New type markings will be found. |
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Length of tail: 41 inches. |
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Width of tail: 25 inches. |
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Width of tail fins: 10 1/2 inches. |
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Dimensions of tail struts: Length, 17 1/4 inches; width, 3 5/8 inches; thickness, 1/8 inch. |
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Material of tail: Steel. |
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Type of filling: Picric acid (tail cone is filled), or type 98 explosive. |
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Weight of filling: 842 pounds. |
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Total weight of bomb: 1,760 pounds. |
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Charge/weight ratio: 48 percent. |
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Construction of body: A cast-steel nose is attached to a tubular body by a continuous circumferential weld and 3 rows of 14 rivets each. The tail cone is held by a continuous circumferential weld and 2 rows of 16 rivets each to a collar which is held in the base of the bomb by 2 rows of round-headed screws (32 screws in each row). This bomb has a threaded fuze pocket in both the nose and tail. |
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Construction of tail: Four 1/8 inch steel fins are spot welded to the tail cone and are braced by a single set of box-type struts. |
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Figure 38 - No. 80 Land Bomb. |
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