Sentetsu Tehoko-class locomotive

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Chosen Government Railway Tehoko class (テホコ)
Korean National Railroad Teou5 class (터우5)
Korean State Railway Tŏuo class (더우오)
Korean Train Wreck - 1945.jpg
A wrecked Sentetsu Tehoko-class locomotive in 1945.
Type and origin
Power typeSteam
BuilderALCo, Shahekou Works
Build date1917–1919
Total produced36
Specifications
Configuration:
 • Whyte4-6-0
Gauge1,435 mm (4 ft 8 12 in)
Driver dia.1,680 mm (66 in)
Length17,972 mm (58 ft 11.6 in)
Width2,997 mm (9 ft 10.0 in)
Height4,232 mm (13 ft 10.6 in)
Loco weight72.52 t (71.37 long tons)
Tender weight43.45 t (42.76 long tons)
Fuel capacity6.00 t (5.91 long tons)
Water cap15,100 L (4,000 US gal)
Firebox:
 • Firegrate area
3.73 m2 (40.1 sq ft)
Boiler:
 • Small tubes167 x 51 mm (2.0 in)
 • Large tubes20 x 137 mm (5.4 in)
Boiler pressure12.6 kgf/cm2 (179 psi)
Heating surface175.50 m2 (1,889.1 sq ft)
 • Tubes161.90 m2 (1,742.7 sq ft)
 • Firebox12.00 m2 (129.2 sq ft)
Superheater:
 • Heating area38.60 m2 (415.5 sq ft)
Cylinders1
Cylinder size530 mm × 660 mm (21 in × 26 in)
Valve gearWalschaerts
Performance figures
Maximum speed95 km/h (59 mph)
Tractive effort120.0 kN (27,000 lbf)
Career
OperatorsChosen Government Railway
Korean National Railroad
Korean State Railway
ClassSentetsu: テホコ
KNR: 터우5
KSR: 더우오
Number in class36
NumbersSentetsu: テホコ1–テホコ36
Delivered1917–1919

The Tehoko-class (テホコ) 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[edit]

The first large class of 4-6-0 locomotives delivered to Sentetsu was the テホコ (Tehoko) class, which were express locomotives equipped with automatic injectors and other improvements, and which were much larger than the previous Teho classes.[1] The first nine, originally numbered 271–279, were built by ALCo's Schenectady Works in 1917,[4] followed by six copies, numbered 280–285, built in the same year by the South Manchuria Railway's Shahekou Works;[1] Another twelve followed in 1918 from ALCO's Pittsburgh plant, numbered 295–306.[1] 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 were initially used as mainline passenger power on the Gyeongbu Line; they were later relegated to branchline duties.[5] In the 1938 general renumbering they became テホコ1 through テホコ36.[4] The 27 locomotives on the roster at the time of the 1918 renumbering became 701–727 in that year;[4] the last nine, delivered in 1918–19 from Shahekou, were numbered 728–736. In Sentetsu's general renumbering of 1938 the class was designated テホコ (Tehoko) class, and the locomotives were renumbered テホコ1 through テホコ38.[1]

Postwar[edit]

Korean National Railroad 터우5 (Teou5) class[edit]

The exact dispersal of the Tehoko-class locomotives after the partition of Korea in 1945 and the division of Sentetsu assets in 1947 is uncertain, but at least seven went to the South,[4] where the Korean National Railroad designated them 터우5 (Teou5) class [1] and used them until April 1955, when they were replaced by diesel locomotives.[5]

The only surviving Teho type locomotive in South Korea is 터우5-700, on display on a plinth at the entrance of Korail's Human Resources Department. Sentetsu held a commemoration of the 10th anniversary of the re-establishment of the Railway Bureau in Yongsan in 1935, and built 터우5-700 for display there. It was built as a cutaway displaying the internal structure of the locomotive, and it was equipped with a motor to move the driving wheels, which in turn shows the operation of the locomotive's moving parts. After use as a display item it was moved to the Railway University in Yongsan, where it was used as an instructional tool for students, until subsequently being relocated once again to its current location for preservation as part of Korea's railway cultural heritage.[5]

Korean State Railway 더우오 (Tŏuo) class[edit]

Most of the class went to the North after the partition, where they were designated 더우오 (Tŏuo) class by the Korean State Railway, but little is known of their service lives and subsequent fates.

Construction[edit]

Sentetsu running number Postwar
Original 1918–1938 1938–1945 Owner Number Builder Year Notes
271 テホ701 テホコ1 ? ? ALCo-Schenectady 1917
272 テホ702 テホコ2 ? ? ALCo-Schenectady 1917
273 テホ703 テホコ3 ? ? ALCo-Schenectady 1917
274 テホ704 テホコ4 ? ? ALCo-Schenectady 1917
275 テホ705 テホコ5 ? ? ALCo-Schenectady 1917
276 テホ706 テホコ6 ? ? ALCo-Schenectady 1917
277 テホ707 テホコ7 ? ? ALCo-Schenectady 1917
278 テホ708 テホコ8 ? ? ALCo-Schenectady 1917
279 テホ709 テホコ9 ? ? ALCo-Schenectady 1917
280 テホ710 テホコ10 KNR 터우5-10 Shahekou 1917
281 テホ711 テホコ11 ? ? Shahekou 1917
282 テホ712 テホコ12 ? ? Shahekou 1917
283 テホ713 テホコ13 KNR 터우5-13 Shahekou 1917
284 テホ714 テホコ14 ? ? Shahekou 1917
285 テホ715 テホコ15 ? ? Shahekou 1917
295 テホ716 テホコ16 ? ? ALCo-Pittsburgh 1918
296 テホ717 テホコ17 KNR 터우5-17 ALCo-Pittsburgh 1918
297 テホ718 テホコ18 ? ? ALCo-Pittsburgh 1918
298 テホ719 テホコ19 KNR 터우5-19 ALCo-Pittsburgh 1918
299 テホ720 テホコ20 KNR 터우5-20 ALCo-Pittsburgh 1918
300 テホ721 テホコ21 ? ? ALCo-Pittsburgh 1918
301 テホ722 テホコ22 ? ? ALCo-Pittsburgh 1918
302 テホ723 テホコ23 ? ? ALCo-Pittsburgh 1918
303 テホ724 テホコ24 ? ? ALCo-Pittsburgh 1918
304 テホ725 テホコ25 ? ? ALCo-Pittsburgh 1918
305 テホ726 テホコ26 ? ? ALCo-Pittsburgh 1918
306 テホ727 テホコ27 ? ? ALCo-Pittsburgh 1918
- テホ728 テホコ28 KNR 터우5-28 Shahekou 1918–19
- テホ729 テホコ29 ? ? Shahekou 1918–19
- テホ730 テホコ30 ? ? Shahekou 1918–19
- テホ731 テホコ31 ? ? Shahekou 1918–19
- テホ732 テホコ32 ? ? Shahekou 1918–19
- テホ733 テホコ33 KNR 터우5-33 Shahekou 1918–19
- テホ734 テホコ34 ? ? Shahekou 1918–19
- テホ735 テホコ35 ? ? Shahekou 1918–19
- テホ736 テホコ36 ? ? Shahekou 1918–19
Total 36

References[edit]

  1. ^ a b c d e f g 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 RR Class TW5 4-6-0s". donsdepot.donrossgroup.net.
  5. ^ a b c "철또군이 들려주는 이야기 : 네이버 블로그". korail0918.blog.me.