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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 |
| Type 0 Model 1, Type 0 Model 2 and Cardboard Type Sea Markers |
| Fuzes: None. |
| Type 0 Model 1 | Cardboard type | |
| Over-all length | 12 1/2 inches. | 12 1/2 inches. |
| Length of body | 7 1/2 inches. | 7 1/2 inches. |
| Diameter of body | 3 inches. | 3 inches. |
| Thickness of wall | 1/64 inch. | 1/16 inch. |
| Material of wall | Sheet steel. | Cardboard. |
| Type of suspension | Dropped by hand. | Dropped by hand. |
| Suspension lug | None. | None. |
| Color and markings | Aluminum color. |
Japanese incription printed on a paper label which is glued to the body of the marker (Instructions for operation of marker.) |
| Length of tail | 5 inches. | 5 inches. |
| Width of tail | 4 1/4 inches. | 3 inches. |
| Width of tail fins | 1 7/8 inches. | 1 1/4 inches. |
| Dimensions of tail struts | 2 3/4 x 5/16 x 1/64 inches. | None. |
| Material of tail | Light tin. | Cardboard. |
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Type of filling: Aluminum powder, containing 6.5 percent zinc. 1 ounce covers 118 square feet. No explosive. |
| Type 0 Model 1 | Cardboard type | |
| Weight of filling | 0.7 pound. | 1.0 pound. |
| Total weight of bomb | 3.5 pounds. | 3.5 pounds. |
| Charge/weight ratio | 20 percent. | 20 percent. |
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Construction of body: Type 0: A sheet steel cylindrical body is fastened to the steel nosepiece by four punch marks. The tail cone and body are joined by a thin disk of light wood secured by four tacks in each component. |
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Cardboard type: A hollow-steel nosepiece is secured to a paper body by a strip of ad-hesive tape. The body is reinforced by cardboard strips. A cardboard tail cone is faste-ned to the body by adhesive tape. Four cardboard fins are glued to the tail cone. Situa-ted in the hollow section of the steel nosepiece is a wooden cylinder 1 7/16 inches in diameter. Fastened to this cylinder is a small wooden disk the same diameter as the in-side of the body. Located between this nose disk and the wooden disk in the tail is a connecting wooden pin 4 3/4 inches long. |
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Operation: Type 0: On impact with the water, the plug in the nose is forced up into the body, forcing the tail portion to be freed from the body, thereby scattering the aluminum powder. |
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Cardboard Type: On impact with water the container breaks up and releases the alumi-num powder. |
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Remarks: Type 0 Model 2 is similar in construction to Model 1. It is painted yellow over all and contains a filling of dark green powder which produces a green slick on the water. |
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Figure 84 - Type 0 Model 1, Type 0 Model 2, and Cardboard Type Sea Marker. |
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