Chosen Government Railway Satai class (サタイ) Korean National RR Sata class (사타) Korean State Railway Sadaha class (사다하)
Nippon Sharyo's builder's photo
Type and origin Power type Steam Builder Gyeongseong Works, Hitachi Build date 1934–1939 Total produced 24
Specifications Configuration: ​  • Whyte 2-10-2T Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,450 mm (57 in) Length 13,878 mm (546.4 in) Width 3,260 mm (128 in) Height 4,750 mm (187 in) Adhesive weight 82.00 t (80.70 long tons; 90.39 short tons) Loco weight 110.00 t (108.26 long tons; 121.25 short tons) Fuel type Coal Fuel capacity 4.00 t (3.94 long tons; 4.41 short tons) Water cap. 8.50 m3 (300 cu ft) Firebox: ​  • Grate area 4.75 m2 (51.1 sq ft) Boiler: ​  • Small tubes 170 x 51 mm (2.0 in)  • Large tubes 32 x 137 mm (5.4 in) Boiler pressure 14.0 kgf/cm2 (199 psi) Heating surface: ​  • Firebox 15.0 m2 (161 sq ft)  • Tubes 204.8 m2 (2,204 sq ft)  • Total surface 290.1 m2 (3,123 sq ft) Superheater: ​  • Heating area 70.3 m2 (757 sq ft) Cylinder size 560 mm × 710 mm (22 in × 28 in) Valve gear Walschaerts
Performance figures Maximum speed 75 km/h (47 mph) Tractive effort 179.0 kN (40,200 lbf)
Career Operators Chosen Government Railway Korean State Railway Korean National Railroad Class Sentetsu: サタイ KNR: 사타 KSR: 사다하 Number in class Sentetsu: 24 KNR: 8 KSR: 16 Numbers サタイ1 - サタイ24 (1938-1945) Delivered 1934–1939

The Satai class (サタイ) class locomotives were a class of large steam tank locomotives of the Chosen Government Railway (Sentetsu) with 2-10-2T wheel arrangement.^[1] The "Sata" name came from the American naming system for steam locomotives, under which locomotives with 2-10-2 wheel arrangement were called "Santa Fe".^[2]

The Satai class were large tank locomotives with high tractive effort, designed specifically for use on mountainous lines. Designed locally, a total of 24 were delivered to Sentetsu, the first four being built in 1934 at the Gyeongseong Works, and the last five in 1939 by Hitachi.^[1] Originally numbered 1801 through 1819, they received the サタイ1 through サタイ19 numbers in Sentetsu's general renumbering of 1938, while サタイ20–サタイ24 were built in 1939, after the new numbering system was introduced.^[3]

In the division of railway assets between North and South, sixteen of the Satai class locomotives went to the Korean State Railway in the North, designated 사다하 (Sadaha) class, and eight to the Korean National Railroad in the South, as 사타 (Sata) class.^[3]