Japanese submarine Yu 24

Yu 24 was an Imperial Japanese Army transport submarine of the Yu 1 subclass of the Yu I type. Constructed for use during the latter stages of World War II, she served in the waters of the Japanese archipelago.

History
Japan
NameYu 24
BuilderHitachi Kasado Works, KudamatsuJapan
FateSank in accident 1945
General characteristics Yu I type
TypeTransport submarine
Displacement
  • 274 long tons (278 t) surfaced
  • 346 long tons (352 t) submerged
Length41.40 m (135 ft 10 in) overall
Beam3.90 m (12 ft 10 in)
Draft3.00 m (9 ft 10 in)
Propulsion
  • 2 × Hesselman engines
  • 298 kW (400 bhp) surfaced
  • 56 kW (75 shp) submerged
  • single shaft
Speed
  • 10 knots (19 km/h; 12 mph) surfaced
  • 4 knots (7.4 km/h; 4.6 mph) submerged
Range
  • 1,500 nmi (2,800 km; 1,700 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 32 nmi (59 km; 37 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth100 m (328 ft)
Capacity24 tons freight or 40 troops
Complement23
Armament

Construction edit

In the final two years of World War II, the Imperial Japanese Army constructed transport submarines — officially the Type 3 submergence transport vehicle and known to the Japanese Army as the Maru Yu — with which to supply its isolated island garrisons in the Pacific. Only submarines of the Yu I type were completed and saw service. The Yu I type was produced in four subclasses, each produced by a different manufacturer and differing primarily in the design of their conning towers and details of their gun armament. None carried torpedoes or had torpedo tubes. Yu 24 was a unit of the Yu 1 subclass.[1]

The Hitachi Kasado Works (Hitachi Kasado Seisakujo) at Kudamatsu, Japan, constructed Yu 24.[1][2] Records of the details of the construction of Yu 24 have not been discovered, but the earlier Yu I-type submarines were laid down and launched during the latter half of 1943 and entered service at the end of 1943 or early in 1944.[2][3]

Service history edit

Yu 24 spent her operational career in Japanese home waters.[4] Surviving records of the activities of Imperial Japanese Army submarines are fragmentary,[3][5] and no records have been discovered describing her specific activities in support of any particular operation.[2][4] One source claims that she never was commissioned and sank in an accident at Hitachi in Ibaraki Prefecture sometime in 1945.[2]

References edit

Footnotes edit

  1. ^ a b Mühlthaler, p. 329.
  2. ^ a b c d IJA Subs, ijnsubsite.com Accessed 14 May 2022
  3. ^ a b Mühlthaler, pp. 329–330.
  4. ^ a b Mühlthaler, p. 330.
  5. ^ Bailey, pp. 55–57, 63.

Bibliography edit

  • Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-962-6.
  • Bailey, Mark L. (1998). "Imperial Japanese Army Transport Submarines: Details of the YU-2 Class Submarine YU-3". Warship International. XXXV (1): 55–63.
  • Carpenter, Dorr B. & Polmar, Norman (1986). Submarines of the Imperial Japanese Navy 1904–1945. London: Conway Maritime Press. ISBN 0-85177-396-6.
  • Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN 0-85177-146-7.
  • Mühlthaler, Erich (1998). "Re:Imperial Japanese Army Transport Submarines". Warship International. XXXV (4): 329–330. ISSN 0043-0374.
  • Rekishi Gunzō, History of Pacific War Extra, Perfect guide, The submarines of the Imperial Japanese Forces, Gakken, Tokyo Japan, 2005, ISBN 4-05-603890-2.
  • Rekishi Gunzō, History of Pacific War Vol.45, Truth histories of the Imperial Japanese Naval Vessels, Gakken, Tokyo Japan, 2004, ISBN 4-05-603412-5.
  • Ships of the World No.506, Kaijinsha, Tokyo Japan, 1996.
  • The Maru Special, Japanese Naval Vessels No.43 Japanese Submarines III, Ushio Shobō, Tokyo Japan, 1980.
  • Atsumi Nakashima, Army Submarine Fleet, "The secret project !, The men challenged the deep sea", Shinjinbutsu Ōraisha, Tokyo Japan, 2006, ISBN 4-404-03413-X.
  • 50 year history of the Japan Steel Works (first volume and second volume), Japan Steel Works, 1968.