CGR class S1
|Ceylon Government Railways Class S1|
|Fleet numbers||501, 502, 503|
|Operator(s)||Ceylon Government Railway, Now Sri Lanka Railways|
|Line(s) served||Coastal Line (Sri Lanka)|
|Train length||206 ft 6 in (62.94 m)|
|Maximum speed||55 mph (89 km/h)|
|Weight||96.2 t (94.7 long tons; 106.0 short tons)|
|Prime mover(s)||English Electric H6 Type|
|Power output||2 x 180 hp (130 kW)|
|AAR wheel arrangement||Bo-2+Bo-2+2-Bo+2-Bo|
|Track gauge||1,676 mm (5 ft 6 in)|
These units arrived Ceylon, Now Sri Lanka in 1938. Three units were given the names Silver Foam (501), Silver Spray (502) and Silver Mist (503). Their inaugural run from Colombo Fort Station to Galle took place on 25 February 1938. These train-sets were used only on the Coastal Line (Sri Lanka). These train-sets served CGR for about 19 years and then all train-sets were scrapped in 1955.
- "Suburban Diesel Push-Pull types". Model Railroad Club of Sri Lanka. Retrieved 20 August 2014.
- Nalin Abesinghe (April 2012). "Class S1 Self-propelled Articulated Power Coach" [ශ්රී ලකාවේ මුල්ම බලවේග දුම්රිය]. Lanka Railway Digest (in Sinhala). Sri Lanka. 1 (1): 16. ISSN 2279-1213.
- "Class S1". Sri Lanka Railways Info Page. Retrieved 20 August 2014.