The Imperial Japanese Navy developed a number of spin-stabilized rockets during World War II, but only this one ever saw service use. These went to sea in launchers containg 28 rockets with six launchers on most carriers. The rocket had an incendiary shrapnel warhead, somewhat similar in design to the "Sankaidan" Type 3 projectile used for guns, and had a time fuze set to explode the warhead at either 1,000 or 1,500 meters (1,100 or 1,640 yards). They were electrically fired in pairs or automatically in 14-rocket sets, the latter action taking 10 seconds to fire all rockets.
|Designation||76.5 mm/115 3rd Year Type (Model 1914) Kihô|
|Ship Class Used On||Many ships from 1910s through 1930s|
|Date Of Design||1914|
|Date In Service||1916 (naval version)|
|Gun Weight||62 lbs. (28.1 kg) unloaded|
|Gun Length oa||54 in (1.37 m)|
|Bore Length||29.5 in (0.75 m)|
|Number Of Grooves||4 LH twist|
|Length Of Rifling||N/A|
|Rate Of Fire||400 to 500 rpm|
|Designation||12 cm (4.7") AA Rocket|
|Ship Class Used On||Carriers|
|Date Of Design||1944|
|Date In Service||1944|
|Firing Rails||42.65 in (1.083 m)|
|Maximum Velocity||656 fps (200 mps)|
|Rate Of Fire||14 rockets in 10 seconds|
Reloading was by hand.
Most Carriers (6) and Shinano (12) 1a: Type 5 (1945) 2a
|Weight||3,521 lbs. (1,597 kg)|
|Elevation||+5 / +80 degrees|
|Elevation Rate||18 degees per second|
|Train Rate||22 degrees per second|
This rocket or a similar one with an HE warhead was also carried by some explosive motor boats fitted with a simple launching trough.
- ^These launchers were not installed on Shinano before her loss.
- "Naval Weapons of World War Two" by John Campbell
- "The 12 cm Multiple Rocket Launcher of the Imperial Japanese Navy" article by Hans Lengerer and Tomoko Rehm-Takahara in "Warship Volume IX"
- US Naval Technical Mission to Japan report O-19: Japanese Projectiles General Types
- 04 July 2006
- 27 May 2012
- Updated to latest template