JNR Class E10

The Class E10 (E10形) was a class of 2-10-4T steam locomotives built for the Japanese Government Railways (JGR) in 1948 and designed by Hideo Shima. They were numbered E10 1-E10 5.

Class E10
Preserved E10 2 at Ōme Railway Park, May 2006
Type and origin Power type Steam Designer Atsuo Kinugasa, Eiichi Watabayashi Builder Kisha Seizō Serial number 2445 - 2449 Build date 1948 Total produced 5
Specifications Configuration: ​  • Whyte 2-10-4T  • UIC 1'E2'2t Leading dia. 860 mm (2 ft 10 in) Driver dia. 1,250 mm (4 ft 1 in) Trailing dia. 860 mm (2 ft 10 in) Length 14,450 mm (47 ft 5 in) Height 3,982 mm (13 ft 0.8 in) Axle load 14.24 t (14.02 long tons; 15.70 short tons) Adhesive weight 70.47 t (69.36 long tons; 77.68 short tons) Loco weight 102.1 t (100.5 long tons; 112.5 short tons) Boiler pressure 16.0 kg/cm2 (228 psi) Cylinders 2 Cylinder size 550 mm × 660 mm (22 in × 26 in) (bore × stroke)
Career Preserved 1 Scrapped 1962 Disposition One preserved, four scrapped

Following the end of World War II the JGR was prohibited by GHQ from building new locomotives due to financial difficulties. However, an exception was granted for the E10s to replace the ageing JNR Class 4110 locomotives because it was not possible to substitute existing locomotives on the steep gradients of the Ōu Main Line where they were used.

The E10 boiler was a unique design based on the JNR Class D52 with the fire grate area reduced by 0.55 m² (5.9 sq ft).^[1]

Five locomotives were built by Kisha Seizo in 1948. They were the last steam locomotives built for Japanese National Railways.^[2] The last examples were withdrawn in 1962.

Preserved examples

One E10, E10 2, was preserved at Ome Railway Park in Ōme, Tokyo.^[3]

See also

• Japan Railways locomotive numbering and classification