JNR Class E10

The Class E10 (E10形) is a type of 2-10-4 steam locomotive built by the Japanese Government Railways (JGR). They were numbered E10 1-E10 5 . They were built in 1948 .

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 2-10-4  • UIC 1'E2' Leading dia. 860 mm Driver dia. 1,250 mm Trailing dia. 860 mm Length 14,450 mm Height 3,982 mm Axle load 14.24 t Adhesive weight 70.47 t Loco weight 102.1 t Boiler pressure 16.0 kg/cm² Cylinders 2 Cylinder size 550 mm bore × 660 mm stroke
Career Preserved 1 Scrapped 1962

Following the end of World War II Japanese Government Railways 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. This was because it was not possible to substitute existing locomotives on the steep gradients of the Ōu Main Line where the 4110s were used.

The boiler of the E10 was a special design based on the JNR Class D52 with the fire grate area reduced by 0.55m².[1]

Five locomotives were manufactured by Kisha Seizō in 1948. They were the last steam locomotives built for Japanese National Railways.[2]

The last examples in regular service were withdrawn in 1962.