I-1-Class Submarines (Kaidai Type I)
First Fleet Submarines - I-1-Class were Japan's first large fleet submarines. 4 boats commissioned 1926-1929. Kaidai Type I (first of series). Large (1,635 tons surface), diesel-electric, 17.5 knots surface. Six 21-inch torpedo tubes, 14 torpedoes carried. 10,000 nm range (trans-Pacific capability). One 4.7-inch deck gun. All 4 served WWII (1941-1945). All 4 lost (100% loss rate). I-1 sank USS Edsall DD-219 (March 1942). Founded Japanese fleet submarine tradition - trans-Pacific range, fleet speed, heavy torpedo armament. Evolved into later Kaidai types and specialized submarines.
Specifications
- Displacement (std)
- 2135 t
- Displacement (full)
- 2135 t
- Length
- 321.5 ft
- Beam
- 29.9 ft
- Crew
- 70
- Ships built
- 4
- Commissioned
- 1926-1929
- Decommissioned
- 1943-1945 (all sunk)
Performance
- Top speed
- 18 kn
- Range
- 10000 nm at 10 knots surface
Armament
- Secondary guns
- None
- Torpedoes
- 6× 533mm (21-inch) - 4 bow, 2 stern
Armor & Systems
- Belt
- None
In-Game
- Tier
- T4
- Game power
- 83.02
- Research cost
- 29,223
- Credit cost
- 58,114
Notable
- First large Japanese fleet submarines (1926-1929)
- Kaidai Type I (first of Kaidai series)
- 10,000 nm range (trans-Pacific capability)
- 17.5 knots surface (fleet speed)
- All 4 lost WWII (100% loss)
- I-1 sank USS Edsall DD-219 (March 1942)
- Founded Japanese fleet submarine doctrine
- Showed Japanese submarine capabilities