Japanese Government Railways 2-6-4 Locomotives in Japan

Class C10 (Locobase 3824)

Data from Hiroshi Takagi, both from his website ([]) and personal communication August 2000. His indispensable assistance is gratefully acknowledged. See also A Profile of Japanese Steam Locomotives website put up in 2007 by "Toki S." at [], last accessed 27 September 2015.

Firebox heating surface includes 11.8 sq ft (1.1 sq m) of arch tubes. These weren't the definitive Baltic tanks as they had riveted boilers. Like the later C11s, they started service with boilers pressed to 200 lb.

Information from Ejii Nozawa's web site ([]) notes that C10s were built in the one year (1930) by Kawasaki and KSK.

Note that from 1931 on heating surface areas on Japanese locomotives were calculated on the fire side of the tubes and flues. This followed German practice. A direct comparison with surface areas of North American and British locomotives requires adding approximately 6-10% to the figures shown.

Class C11 (Locobase 2878)

Data from Hiroshi Takagi, both from his website ([]) and personal communication August 2000. His indispensable assistance is gratefully acknowledged. See also A Profile of Japanese Steam Locomotives website put up in 2007 by "Toki S." at [], last accessed 27 September 2015.

Branch-line passenger engine built from 1932 through World War II to 1947. Despite a shorter wheelbase, the C11s had a lower axle loading, possibly because some of the longitudinal boiler joints that had been riveted jwere replaced by welded bonds.

Information from Ejii Nozawa's web site ([]) notes that C10s were built by Hitachi, Kawasaki, KSK, and Nippon

A direct comparison with tube & flue heating surface areas of North American and British locomotives requires adding approximately 6-10% to the figures shown.

Class C11/141 (Locobase 3825)

Data from Hiroshi Takagi, both from his website ([]) and personal communication August 2000. His indispensable assistance is gratefully acknowledged.

Branch-line passenger engine built from 1932 through World War II to 1947.

This later group of C11s was heavier in all weights -- adhesion, engine, and axle loading. The coupled wheelbase was shorter, while the engine wheelbase grew by Firebox heating surface includes 11.8 sq ft (1.1 sq m) of arch tubes.

Information from Ejii Nozawa's web site ([]) notes that C11s were built by Hitachi, Kawasaki, KSK, and Nippon.

Information from Ejii Nozawa's web site ([]) notes that C11s were built by Hitachi, Kawasaki, KSK, and Nippon.

A direct comparison with tube & flue heating surface areas of North American and British locomotives requires adding approximately 6-10% to the figures shown.