GER Class C72 LNER Class J68
J68 0-6-0T No. 68642 at Stratford Locomotive Depot February 1961
Type and origin Power type Steam Designer A. J. Hill Builder Stratford Works Build date 1912–1923 Total produced 30
Specifications Configuration: ​  • Whyte 0-6-0T  • UIC C n2t Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 4 ft 0 in (1.219 m) Wheelbase 13 ft 10 in (4.22 m) Length 27 ft 8 in (8.43 m) over buffers Loco weight 42 long tons 9 cwt (95,100 lb or 43.1 t) Fuel type Coal Fuel capacity 2 long tons 10 cwt (5,600 lb or 2.5 t) Water cap. 1,200 imp gal (5,460 L; 1,440 US gal) Firebox: ​  • Grate area 14.5 sq ft (1.35 m2) Boiler pressure 180 lbf/in2 (1.24 MPa) Heating surface 996.17 sq ft (92.547 m2) Cylinders Two, inside Cylinder size 16.5 in × 22 in (419 mm × 559 mm)
Performance figures Tractive effort 19,091 lbf (84.92 kN)
Career Operators Great Eastern Railway → London and North Eastern Railway → British Railways Class GER: C72 LNER: J68 Power class BR: 2F Axle load class LNER/BR: RA 3 Withdrawn 1940, 1958–1961 Disposition All scrapped

The GER Class C72 was a class of thirty 0-6-0T steam locomotives designed by A. J. Hill for the Great Eastern Railway. They passed to the London and North Eastern Railway (LNER) at the 1923 grouping and received the LNER classification J68.

History

These locomotives were an improved version of the Class S56 tanks, and the final development of James Holden's Class T18 tank locomotives, sharing the same 16.5-by-22-inch (419 mm × 559 mm) cylinders, 4-foot-0-inch (1.219 m) driving wheels, and 13-foot-10-inch (4.22 m) wheelbase. There were three orders, each of ten locomotives, all built at Stratford Works between 1912 and 1923. The first batch were built as suburban passenger tanks and were fitted with Westinghouse air brakes. The second and third batches were built as shunting tanks and were fitted with steam locomotive brakes and vacuum train brakes.

The last batch did not emerge from Stratford until after the grouping.

One locomotive was lent to the War Department in October 1939,^[2] and sold 12 months later,^[3] It was used on the Longmoor Military Railway before being moved to the Bicester Central Ordnance Depot,^[2] and then the Military Port No. 1, Faslane.^[4] The remaining locomotives were renumbered 8638–8666 in order of construction. At nationalisation in 1948 they passed to British Railways, who added 60000 to their numbers. Post war withdrawals started in 1958, and all were gone by 1961.