The was a
transport submarine built for the
Imperial Japanese Navy
The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...
(IJN) during
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
. The IJN planned to build 12 boats, but only 10 vessels were completed by the end of the war. The IJN called these submarines . The type name, was shortened to .
[The read as "Sen'yu-Shō", but the read as "Sen'yu-Ko-gata" in Japanese.]
Several boats were converted to tankers or mother ships for the midget submarines.
Design and description
The ''Ha-101''-class submarines were designed as small, cheap transport submarines to resupply isolated island garrisons. They
displaced surfaced and submerged. The submarines were long, had a
beam
Beam may refer to:
Streams of particles or energy
* Light beam, or beam of light, a directional projection of light energy
** Laser beam
* Particle beam, a stream of charged or neutral particles
**Charged particle beam, a spatially localized g ...
of and a
draft
Draft, The Draft, or Draught may refer to:
Watercraft dimensions
* Draft (hull), the distance from waterline to keel of a vessel
* Draft (sail), degree of curvature in a sail
* Air draft, distance from waterline to the highest point on a ves ...
of . They were designed to carry of cargo.
[Carpenter & Dorr, p. 140]
For surface running, the boats were powered by a single
diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...
that drove one
propeller shaft
A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power and torque and rotation, usually used to connect ...
. When submerged the propeller was driven by a
electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate forc ...
. They could reach on the surface and underwater.
[Chesneau, p. 204] On the surface, the ''Ha-101''s had a range of at ; submerged, they had a range of at . The boats were armed a single mount for a
Type 96 anti-aircraft gun.
[Bagnasco, p. 195]
Planned construction
Project number S57. In February 1944, the IJN planned a small-size transport submarine, the
IJA IJA may refer to:
* Imperial Japanese Army
* ''International Journal of Astrobiology''
* International Jugglers' Association
* ''International Journal of Audiology''
* International Juridical Association (1931–1942)
{{disambiguation ...
planned the
''Maru Yu''.
Boats
See also
*
Type 4 Ka-Tsu
*
Imperial Japanese Army Railways and Shipping Section
The Imperial Japanese Army Railway and Shipping Section was the logistics unit of the Imperial Japanese Army charged with shipping personnel, material and equipment from metropolitan Japan to the combat front overseas.
__TOC__
Railway
Under it ...
*
Type 3 submergence transport vehicle, Yu II type
Footnotes
Bibliography
*
*
*
* , ''History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces"'', Gakken (Japan), March 2005,
* Ships of the World special issue Vol.37, ''History of Japanese Submarines'', , (Japan), August 1993
* The Maru Special, ''Japanese Naval Vessels No.43 Japanese Submarines III'', Ushio Shobō (Japan), September 1980, Book code 68343-43
* The Maru Special, ''Japanese Naval Vessels No.132 Japanese Submarines I "Revised edition"'', Ushio Shobō (Japan), February 1988, Book code 68344-36
*
Senshi Sōsho
The , also called the , is the official military history of Imperial Japan's involvement in the Pacific War from 1937 to 1945. The task of compiling the official account of the Japanese involvement in World War II began in October 1955 with the ope ...
Vol.88, ''Naval armaments and war preparation (2), "And after the outbreak of war"'', Asagumo Simbun (Japan), October 1975
{{DEFAULTSORT:Ha-101
Submarine classes
Submarines of the Imperial Japanese Navy
Merchant submarines