JNR Class D62

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JNR Class D62
Type and origin
Power type Steam
Rebuild date March 1950 – March 1951
(from JNR Class D52)
Number rebuilt 20
Configuration 2-8-4
UIC class 1′D2′ h2
Gauge 1,067 mm (3 ft 6 in)
Driver dia. 1,400 m (55,118 18 in)
Adhesive weight 64 tonnes (63 long tons; 71 short tons)
Loco weight 88 tonnes (87 long tons; 97 short tons)
 • Firegrate area
3.9 square metres (42 sq ft)
Boiler pressure 16.0 kg/cm2 (1.57 MPa; 228 psi)
Heating surface 167 m2 (1,800 sq ft)
 • Heating area 78 m2 (840 sq ft)
Cylinders Two, outside
Cylinder size 550 mm × 660 mm (21 58 in × 26 in)
Performance figures
Tractive effort 190.196 kN (42,758 lbf)
Operators Japanese National Railways
Numbers D62 1 – D62 20
Disposition All scrapped

The Class D62 (D62形?) is a type of 2-8-4 wheel arrangement steam locomotive built by the Japanese National Railways (JNR) in 1950 and 1951.

20 Class D62s were rebuilt from the earlier Class D52, which had a 2-8-2 wheel arrangement.[1] Following the launch of the Class D62, other 2-8-2 locomotives (Class D50 and Class D51) were also converted to 2-8-4, becoming Class D60 and Class D61, respectively.


No examples of the class have been preserved.[2]

In popular culture[edit]

The D62 is the model upon which the Transformers character Astrotrain is based.[3]

See also[edit]


  1. ^ Inoue, Kōichi (1999). 国鉄機関車辞典 [JNR Locomotive Encyclopedia] (in Japanese). Japan: Sankaido. p. 63. ISBN 4-381-10338-6. 
  2. ^ Sasada, Masahiro (September 2012). 国鉄&JR保存車大全 [JNR & JR Preserved Rolling Stock Complete Guide] (in Japanese). Tokyo, Japan: Ikaros Publications Ltd. ISBN 978-4863206175. 
  3. ^ "The Transformers Collection TFC #11 G1 Astrotrain Triple Changer Action Figure by Takara Tomy - Shop Online for Toys in the United States". Fishpond.com. Retrieved 2015-05-27.