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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 4 Mk 1 Launching Rocket ("Baka" Motors) |
| Wing | Fuselage | |
| Over-all length | 65 1/8 inches. | 78 inches. |
| Maximum diameter | 10 1/8 inches. | 10 1/8 inches. |
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Description: Three fuselage motors contained after portion of the Baka serve as the main propulsion units. Two wing motors differing only in method of suspension and having shorter venturi tubes may or may not be used in addition to the fuselage motors. |
| Wing | Fuselage | |
| Weight of complete motor | 266 pounds. | |
| Weight of propellant | 97.8 pounds. | 97.8 pounds (44.8 kg.). |
| Length of propellant stick | 19 3/8 inches. | 19 3/8 inches. |
| Depth of propellant stick | 4 3/8 inches. | 4 3/8 inches. |
| Weight of ignition charge | 120 grams. | 120 grams. |
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Propellant: The propellant consists of 6 sticks of 500 special D.T. (code designation). Chemical analysis of this propellant is: 59.9 percent nitrocellulose, 26.9 percent nitrogly-cerine, 6.1 percent mononitronaphthalene, 2.9 percent ethyl centralite and 1.3 percent volatiles. |
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Ignition: The motors are igneted by electrically fired squibbs fitted into the nose portion of the motor. The firing circuit is controlled by a selector switch in the cockpit. |
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Figure 89 - Type 4 Mk 1 Launching Rocket ("Baka" Motors). |
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