Canadian National class S 2-8-2

Canadian National class S

a preserved S class locomotive

Type and origin Reference:[1] Power type Steam Build date 1913–1936 Total produced 466

Specifications Configuration 2-8-2 UIC class 1'D1' Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Leading dia 31 ^1⁄4 in (794 mm) Driver diameter 63 in (1,600 mm) Trailing dia 43 in (1,092 mm) Wheelbase 35 ft 1 in (10.69 m) Length 78 ft 5 in (23.90 m) including tender Height 14 ft 9 in (4.50 m) Boiler pressure 180 lbf/in^2 (13 kg/cm^2) Cylinders Two Cylinder size 27 in × 30 in (686 mm × 762 mm)

Performance figures Tractive effort 53,000 lbf (235.8 kN)

Career Retired 1961

Canadian National Railway (CN) Class S locomotives were of 2-8-2 wheel arrangement in the Whyte notation, or " 1'D1' " in UIC classification. These locomotives were designed for 16°  operating curvature. The first examples of this very successful class were built for the Grand Trunk Railway in 1913. Major purchases of the class continued through 1924. Sub-classes S-3 and S-4 employed higher pressure boilers with smaller diameter cylinders to achieve similar tractive effort with higher efficiency. The class remained in freight service until the final replacement of steam with diesel-electric locomotives. Twenty-one were renumbered between 4045 and 4097 in 1956.^[1]

Sub-classes

Sub-class	Builder	Works numbers	Dates	CN numbers	Notes[1]
S-1-a	CLC	1353-1402	1916-1917	3200-3249	built as CGR numbers 2800-2849
S-1-b	CLC	1459-1508	1917-1918	3250-3299	built as CGR numbers 2850-2899
S-1-c	MLW	58347-58376	1917	3300-3329	built as CGR numbers 2900-2929
S-1-d	CLC	1535-1594	1918-1919	3330-3389	built as CGR numbers 2930-2989
S-1-e	CLC	1673-1687	1920-1921	3390-3404
S-1-f	ALCO	52788-52812	1913	3405-3429	built as GT numbers 500-524
S-1-f	BLW	40210-40211 40255-40258 40269-40274 40339-40342 40365-40370 40379-40381	1913	3430-3454	built as GT numbers 525-549
S-1-f	MLW	53920-53969	1913	3455-3504	built as GT numbers 550-599
S-1-g	CLC	1449-1458	1917	3505-3514	built as GT numbers 485-494
S-1-g	ALCO	59950-59954	1918	3515-3519	[2] built as GT numbers 480-484
S-1-h	ALCO	58315-58319	1918	3520-3524	[2] built as GT numbers 495-499
S-1-j	CN	53928&53954	1926	3198-3199	[3]
S-2-a	MLW	64475-64509	1923	3525-3559
S-2-b	CLC	1712-1721	1923	3560-3569
S-2-c	MLW	65633-65662	1924	3570-3599
S-3-a	ALCO	59563-59577 60300-60324	1918	3700-3739	[4] USRA Light Mikados built as GT numbers 440-479
S-3-b	ALCO	64510-64517	1923	3740-3747	[4][5]
S-3-c	ALCO	65317-65326	1924	3748-3757	[4]
S-4-a	CN	1623	1930	3800	[3][6]
S-4-b	CLC	1914-1918	1936	3801-3805	[6]

Preservation

Number 3239 was preserved by the Canadian Railway Historical Association. Number 3254 by W.F. Barron of Ashland, Pennsylvania. #3254 is the only operational of the surviving S Class 2-8-2s, finding its home on the rails of Steamtown in Scranton, PA. Number 3377 by the Edaville Railroad, and number 3734 (renumbered 4070) by the National Museum of Steam Propulsion at Middleville, Michigan.^[1]

Notes

1. Clegg, Anthony & Corley, Ray (1969). Canadian National Steam Power. Trains & Trolleys: Montreal. pp. 91–95.
2. Numbers 3515-3517 & 3520-3523 were converted to 0-8-2 switchers in 1936 and 1937
3. Built in Canadian National Railway Point Saint Charles shops
4. Boiler pressure increased to 200 lbf/in² (14 kg/cm²) and cylinder diameter reduced to 26 inches (66 cm).
5. Ordered as GT numbers 600-607, but delivered to CN
6. Boiler pressure increased to 265 lbf/in² (18.6 kg/cm²) and cylinder diameter reduced to 24 inches (61 cm).