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Sentetsu Tehosa-class locomotive

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Chosen Government Railway Tehosa class (テホサ)
Korean National Railroad Teou3 class (터우3)
Korean State Railway Tŏusŏ class (더우서)
Builder's photo of a Tehosa-class locomotive.
Type and origin
Power typeSteam
BuilderALCo, Gyeongseong Works
Build date1911, 1938
Total produced9 (1911, ALCo), 1 (1938, Gyeongseong)
Specifications
Configuration:
 • Whyte4-6-0
Gauge1,435 mm (4 ft 8+12 in)
Driver dia.1,680 mm (66 in)
Length17,642 mm (57 ft 10.6 in)
Width2,821 mm (9 ft 3.1 in)
Height4,232 mm (13 ft 10.6 in)
Loco weight67.60 t (66.53 long tons)
Tender weight43.46 t (42.77 long tons)
Fuel capacity6.00 t (5.91 long tons)
Water cap.15,100 L (4,000 US gal)
Firebox:
 • Grate area4.39 m2 (47.3 sq ft)
Boiler:
 • Small tubes310 x 57 mm (2.2 in)
 • Large tubes24 x 137 mm (5.4 in)
Boiler pressure12.6 kgf/cm2 (179 psi)
Heating surface:
 • Firebox12.00 m2 (129.2 sq ft)
 • Tubes158.80 m2 (1,709.3 sq ft)
 • Total surface170.80 m2 (1,838.5 sq ft)
Superheater:
 • Heating area46.90 m2 (504.8 sq ft)
Cylinders1
Cylinder size510 mm × 660 mm (20 in × 26 in)
Valve gearStephenson
Performance figures
Maximum speed95 km/h (59 mph)
Tractive effort111.0 kN (25,000 lbf)
Career
OperatorsChosen Government Railway
Korean National Railroad
Korean State Railway
ClassSentetsu: テホサ
KNR: 터우3
KSR: 더우서
Number in class10
NumbersSentetsu: テホサ1–テホサ10
Delivered1911, 1938
Data for locomotives as rebuilt in the 1930s.

The Tehosa-class (テホサ) locomotives were a class of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 4-6-0 wheel arrangement.[1] The "Teho" name came from the American naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten Wheeler".[2]

After the Liberation of Korea, of the 178 surviving locomotives of all Teho classes - including six previously owned by private railway companies - 106 went to the Korean National Railroad in the South, and 72 to the Korean State Railway in the North.[3]

Description

Whilst the first two classes of 4-6-0 locomotives in Korea, the Tehoi and Tehoni classes, were built by Baldwin, Sentetsu turned to a different American manufacturer for the third class - ALCo's Brooks Works[4] built nine such locomotives for Sentetsu in 1911.[1] Intended for long-range mixed trains, they were initially numbered 222–230, and subsequently were renumbered 651–659 in 1918. After being rebuilt with superheaters in the 1930s, they were redesignated テホサ (Tehosa) class and numbered テホサ1 through テホサ9 in the 1938 general renumbering.[4] Like all Teho-type locomotives operated by Sentetsu, they had driving wheels of 1,680 mm (66 in) and a top speed of 95 km/h (59 mph),[1] and many were assigned to the Manpo Line in the northern part of the country.[1] One final unit, テホサ10, was built by Gyeongseong Works in 1938.[4]

Postwar

Korean National Railroad 터우3 (Teou3) class

The exact dispersal of the ten Tehosa-class locomotives after the partition of Korea in 1945 and the division of Sentetsu assets in 1947 is uncertain, but at least two went to the South, where the Korean National Railroad designated them 터우3 (Teou3) class [1] and were used primarily on branchline trains.[4]

Korean State Railway 더우서 (Tŏusŏ) class

Having been assigned primarily to the Manpo Line,[1] most of the class went to the North after the partition, where they were designated 더우서 (Tŏusŏ) class by the Korean State Railway, but little is known of their service lives and subsequent fates.

Construction

Sentetsu running number Postwar
Original 1918–1938 1938–1945 Owner Number Builder Year Notes
222 テホ611 テホサ1 KNR 터우3-1 ALCo 1911
223 テホ612 テホサ2 ? ? ALCo 1911
224 テホ613 テホサ3 ? ? ALCo 1911
225 テホ614 テホサ4 ? ? ALCo 1911
226 テホ615 テホサ5 ? ? ALCo 1911
227 テホ616 テホサ6 ? ? ALCo 1911
228 テホ617 テホサ7 ? ? ALCo 1911
229 テホ618 テホサ8 KNR 터우3-8 ALCo 1911
230 テホ619 テホサ9 ? ? ALCo 1911
- - テホサ10 ? ? Gyeongseong 1938
Total 10

References

  1. ^ a b c d e f Byeon, Seong-u (1999). 한국철도차량 100년사 [Korean Railways Rolling Stock Centennial] (in Korean). Seoul: Korea Rolling Stock Technical Corp.
  2. ^ Colvin, Fred H. (1906). The railroad pocket-book: a quick reference cyclopedia of railroad information. New York, Derry-Collard; London, Locomotive Publishing Company (US-UK co-edition). p. L‑9.
  3. ^ "Korean National RR TW-1 4-6-0". donsdepot.donrossgroup.net.
  4. ^ a b c d "Korean National 4-6-0 TW-3". donsdepot.donrossgroup.net.