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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 3 and Model 10 Bomb Launching Devices |
| Type 3 | Model 10 | |
| Over-all length | 40 1/2 inches. | 33 inches. |
| Maximum diameter | 7 7/8 inches (20 centimeters). |
7 7/8 inches (20 centimeters). |
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Description: Both motors are designed as propulsion units for 60-kilogram ordinary or land use bombs. The motors are used to propel these bombs from crude V-shaped woo-den troughs for land bombardement. The motors are interchangeable and may be used on either the 60-kilogram ordinary or land use bomb. |
| Type 3 | Model 10 | |
| Weight of complete round | 92 pounds (42 kilograms). |
52 pounds (23.6 kilograms). |
| Weight of propellant | 25 pounds (11 kilograms). |
13 pounds (5.9 kilograms). |
| Length of propellant stick | 18 1/2 inches. | 10 1/4 inches. |
| Depth of propellant stick | 3 5/16 inches. | 3 5/16 inches. |
| Weight of ignition charge | 2 ounces. | 2 ounces. |
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Propellant: The propellant charge consists of three sticks of 343 D.T.2 and 343 special D.T.2 (code designation) for the Model 10 and type 3, respectively. The chemical analy-sis of D.T.2 is 65 percent nitrocellulose, 30 percent nitroglycerine, 3.0 percent ethyl cen-tralite and 2.0 percent sodium chloride. The chemical analysis of 343 special D.T.2 is not known but probably involves a small variation of 343 D.T.2. The complete Japanese de-signation for 343 D.T.2 is type 98 Mk 2 pro-pellant. |
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Ingnition: The propellant is ignited by an electrical squib. Current is supplied by a hand generator. |
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Launcher: A crude V-shaped wooden trough mounted on a bipod forward and a steel base plate aft. The angle of elevation can be varied. |
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Remarks: The variation in the size of the two motors is possibly a means of varying the range. |
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Figure 91 - Type 3 and Model 10 Bomb-Launching Device. |
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