Sentetsu Mikani-class locomotive

The Mikani-class (ミカニ) locomotives were a group of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 2-8-2 wheel arrangement. The "Mika" name came from the American naming system for steam locomotives, under which locomotives with 2-8-2 wheel arrangement were called "Mikado" in honour of the Emperor of Japan, as the first 2-8-2 locomotives in the world were built for Japan.

Chosen Government Railway Mikani class (ミカニ)
Korean National Railroad Mika2 class (미카2)
Korean State Railway Migadu class (미가두)
Type and origin
Power typeSteam
BuilderALCo
Build date1919
Total produced12
Specifications
Configuration:
​
 • Whyte2-8-2
Gauge1,435 mm (4 ft 8 1⁄2 in)
Driver dia.1,450 mm (57.09 in)
Length22,094 mm (869.8 in)
Width3,023 mm (9 ft 11.0 in)
Height4,254 mm (13 ft 11.5 in)
Loco weight93.40 t (91.92 long tons)
Tender weight57.50 t (56.59 long tons)
Fuel capacity9.4 t (9.3 long tons)
Water cap22.7 m3 (6,000 US gal)
Firebox:
 • Firegrate area		4.45 m2 (47.9 sq ft)
Boiler:
​
 • Small tubes164 x 51 mm (2.0 in)
 • Large tubes28 x 137 mm (5.4 in)
Boiler pressure13.0 kgf/cm2 (185 psi)
Heating surface239.80 m2 (2,581.2 sq ft)
 • Tubes222.30 m2 (2,392.8 sq ft)
 • Firebox17.50 m2 (188.4 sq ft)
Superheater:
​
 • Heating area69.00 m2 (742.7 sq ft)
Cylinders2
Cylinder size620 mm × 711 mm
(24.409 in × 27.992 in)
Valve gearWalschaerts
Performance figures
Maximum speed70 km/h (43 mph)
Tractive effort204.0 kN (45,900 lbf)
Career
OperatorsChosen Government Railway
Korean National Railroad
Korean State Railway
ClassSentetsu: ミカニ
KNR: 미카2
KSR: 미가두
Number in classSentetsu: 12
KNR: at least 1
KSR: at least 1
NumbersSentetsu: ミカニ1–ミカニ12
KNR: see text
KSR: 62xx (see text)
Delivered1919

Of all Mika classes, 131 went to the Korean National Railroad in South Korea and 292 to the Korean State Railway in North Korea.[1] Of these 423 locomotives, 356 were from Sentetsu; the other 67 were South Manchuria Railway Mikai-class engines on loan to Sentetsu along with Mika-type locomotives which had previously belonged to the twelve privately owned railways in Korea before 1945. Not included in this number, however, are the six SMR Mikai-class locomotives that were assigned to SMR's Rajin depot for operation on SMR's lines in northeastern Korea, and the eight SMR Mikaro-class locomotives likewise assigned to the Rajin depot; these fourteen locomotives were taken over by the Korean State Railway. Despite the DPRK government's extensive anti-Japanese propaganda, the railway nevertheless continues to use the "Mika" name officially for these locomotives even though it refers to the Japanese emperor.[2]

Description

By the late 1910s, existing multipurpose locomotives were proving insufficient for the increasingly heavy freight trains being run in Korea. To fill the need for dedicated freight locomotives, in 1919 Sentetsu imported twelve Mikai-class and twelve Mikani-class locomotives from the United States in 1919.[3]

The second of the original two groups of 2-8-2 locomotives to be delivered to Sentetsu in 1919 was the Mikani class built by ALCo in 1919.[3] Originally numbered ミカニ801–ミカニ812, they became ミカニ1–ミカニ12 in Sentetsu's 1938 general renumbering.[4]

Postwar

After the partition of Korea, both the Korean State Railway in the North and the Korean National Railroad in the South operated Mikani class locomotives, but the exact disposition between the two is uncertain. However, it is known that ミカニ4 went to the Korean State Railway after the 1947 division of Sentetsu assets. It was destroyed during the Korean War, then captured by the US Army and taken south to strip for parts.[4] In the South they were designated 미카2 (Mika2) class,[4] in the North they were initially designated 미가두 (Migadu) class, and later renumbered in the 6200 series.

Construction
Original number1938–1945 numberBuilderYearPostwar ownerPostwar numberNotes
ミカイ801ミカイ1ALCo1919??
ミカイ802ミカイ2ALCo1919??
ミカイ803ミカイ3ALCo1919??
ミカイ804ミカイ4ALCo1919KSR미가두4Destroyed during the Korean War, captured and taken south to strip for parts.[4]
ミカイ805ミカイ5ALCo1919??
ミカイ806ミカイ6ALCo1919??
ミカイ807ミカイ7ALCo1919??
ミカイ808ミカイ8ALCo1919??
ミカイ809ミカイ9ALCo1919??
ミカイ810ミカイ10ALCo1919??
ミカイ811ミカイ11ALCo1919??
ミカイ812ミカイ12ALCo1919??

References
  1. "Korean National RR MK-1 2-8-2". donsdepot.donrossgroup.net.
  2. Kokubu, Hayato (January 2007). 将軍様の鉄道 [Shōgun-sama no Tetsudō] (in Japanese). 新潮社 (Shinchosha). p. 106–107. ISBN 978-4-10-303731-6.
  3. Byeon, Seong-u (1999). 한국철도차량 100년사 [Korean Railways Rolling Stock Centennial] (in Korean). Seoul: Korea Rolling Stock Technical Corp.
  4. "Korean National RR MK-2 2-8-2". donsdepot.donrossgroup.net.
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