NER Class S3

NER Class S3 LNER Class B16
No. 61469 at Croxdale 12 June 1954
Type and origin Power type Steam Designer Vincent Raven Builder NER Darlington Build date 1919-1924 Total produced 70
Specifications Configuration: ​  • Whyte 4-6-0 Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 1 in (0.940 m) Driver dia. 5 ft 8 in (1.727 m) Wheelbase 27 ft 8 in (8.43 m) engine 12 ft 8 in (3.86 m) tender 52 ft 5.8 in (15.997 m) total Axle load 20 long tons (20 t; 22 short tons) Loco weight B16/1, 77.7 long tons (78.9 t; 87.0 short tons) B16/2, 79.2 long tons (80.5 t; 88.7 short tons) B16/3, 78.95 long tons (80.22 t; 88.42 short tons) Tender weight 46.6 long tons (47.3 t; 52.2 short tons) Total weight B16/1, 124.3 long tons (126.3 t; 139.2 short tons) B16/2, 125.8 long tons (127.8 t; 140.9 short tons) B16/3, 125.55 long tons (127.56 t; 140.62 short tons) Fuel type Coal Firebox:  • Firegrate area 27 sq ft (2.5 m2) Boiler 5 ft 6 in (1.68 m) diameter Boiler pressure 180 psi (1.2 MPa) Heating surface 1,958 sq ft (181.9 m2)  • Tubes 866 sq ft (80.5 m2)  • Flues 534 sq ft (49.6 m2)  • Firebox 166 sq ft (15.4 m2) Superheater: ​  • Heating area 392 sq ft (36.4 m2) Cylinders three Cylinder size 18 1⁄2 in × 26 in (470 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 30,312 lbf (134.83 kN)
Career Operators North Eastern Railway, London & North Eastern Railway, British Railways Retired 1958-1964 Disposition All scrapped

The North Eastern Railway Class S3, classified B16 by the LNER, was a class of 4-6-0 steam locomotive designed for mixed traffic work. It was designed by Vincent Raven and introduced in 1920. The earlier members of this class were fitted with Westinghouse Brakes - all of this equipment was removed during the 1930s.

Seventy S3/B16 locomotives were built between 1919 and 1924. The NER began numbering this class in the range No. 840 through to No. 943 (though not contiguously), those built after late 1922 (from No. 2363 onwards) directly receiving their LNER number. In 1923 all seventy locomotives passed to the London and North Eastern Railway (LNER). Some of the existing members were subsequently rebuilt, as shown below (the initially built locomotives being re-designated class B16/1. Seven were rebuilt by Gresley, becoming class B16/2 and seventeen, by Thompson, designated class B16/3). Under the LNER re-numbering scheme, of 1946, they received numbers 1400-1468. Sixty-nine passed into British Railways ownership in 1948 and they were again re-numbered in the sequence 61400-61478. (Numbers 61400 to 61409 were directly re-numbered as 61469 to 61478). One locomotive, No. 925, was badly damaged (along with A4 4469 Sir Ralph Wedgwood) during a German air-raid on York, 29 April 1942 and was subsequently scrapped. The last, of any variety of B16, was scrapped in 1964 and none have been preserved.