Imperial Japanese Navy Technical Department
The Imperial Japanese Navy Technical Department (艦政本部, kansei honbu, Short form: 艦本 kampon / Kanhon) was the externally operating division of the
Taishō period weapons
The Department developed various weapons during the
This nomenclature followed on from
3rd Year Type Guns (1914)
- 16.1-inch (410 mm) 41 cm/45 3rd Year Type naval gun (410mm, 45 caliber)
- 7.9-inch (200 mm) 20 cm/50 3rd Year Type naval gun (I)
- 7.9-inch (200 mm) 20 cm/50 3rd Year Type naval gun (II)
- 6.1 in (155 mm) 15.5 cm/60 3rd Year Type naval gun
- 5.51-inch (140 mm) 14 cm/50 3rd Year Type naval gun
- 5 in (127 mm) 12.7 cm/50 3rd Year Type naval gun
- 4.7 in (120 mm) 12cm/45 3rd Year Type naval gun
(Note: "3rd Year" refers to these weapons Welin breech block, which was introduced in 1914; the weapons themselves often came later)
5th Year Type Gun (1916)
18.9-inch (480 mm) 48 cm/45 5th Year Type naval gun
6th Year Type Torpedo (1917)
The 6th Year Type torpedo
- Diameter : 21 inches (533 mm)
- Length : 22 ft 5 in (6.8 m)
- Weight :3,157 lb (1,432 kg)
- Explosive charge: 441 lb (200 kg)
- Range :
- 7,000 m (7,700 yd) at 36 kn (67 km/h; 41 mph)
- 10,000 m (11,000 yd) at 32 kn (59 km/h; 37 mph)
- 15,000 m (16,000 yd) at 26 kn (48 km/h; 30 mph).
It was widely used in surface ships and submarines into World War II:
- Ōtori class torpedo boats
- Type B1 submarines[3]
- Type L3 and L4 submarines
- Kaidai class submarines
- Kaichū type submarines
- Momi class destroyers
- Wakatake class destroyers
8th Year Type Torpedo (1919)
The 8th Year Type torpedo:
- Diameter: 24 inches (610 mm)
- Length: 27 ft 7 in (8.4 m)
- Weight: 5,207 lb (2,362 kg)
- Explosive charge: 761 lb (345 kg)
- Range:
- 10,000 m (11,000 yd) at 38 kn (70 km/h; 44 mph)
- 15,000 m (16,000 yd) at 32 kn (59 km/h; 37 mph)
- 20,000 m (22,000 yd) at 28 kn (52 km/h; 32 mph).
An advance on its predecessor, it was used in:
- Mutsuki class destroyers
9th Year Type Mine (1920)
The 9th Year Type mine was deployed from various ships.
It was used as a test explosive on the hulk of Tosa.
11th Year Type Guns (1922)
The 11th Year Type breech was a
11th Year Type Guns were mounted on the following ships:
- Ōtori class torpedo boats
- Kaidai class submarines
- Type B submarines
- Type C submarines
References
- ^ Japanese Torpedoes, combinedfleet.com
- ^ Naval Institute Press, 1985), accessed 26 April 2010
- ^ Report of the sinking of I-35, Department of Defence (Australia), undated World War II, accessed 24 April 2010