BR Standard Class 3 2-6-2T

BR Standard Class 3 2-6-2T

82026 on station pilot duty at Waterloo in 1965

Type and origin Power type Steam Designer R. A. Riddles Builder Swindon Works Build date April 1952 – August 1955 Total produced 45

Specifications Configuration 2-6-2T UIC class 1′C1′ h2t Gauge 4 ft 8 1⁄2 in (1,435 mm) Leading dia. 3 ft 0 in (0.914 m) Driver dia. 5 ft 3 in (1.600 m) Trailing dia. 3 ft 0 in (0.914 m) Length 40 ft 10 1⁄2 in (12.46 m) Width 8 ft 6 in (2.59 m) Height 13 ft 0 in (3.96 m) Axle load 16.30 long tons (16.56 t; 18.26 short tons) Adhesive weight 48.75 long tons (49.53 t; 54.60 short tons) Loco weight 74.05 long tons (75.24 t; 82.94 short tons) Fuel type Coal Fuel capacity 3.00 long tons (3.05 t; 3.36 short tons) Water cap 1,500 imp gal (6,800 l; 1,800 US gal) Firebox:  • Firegrate area 20.35 sq ft (1.891 m2) Boiler BR6 Boiler pressure 200 psi (1.38 MPa) Heating surface:  • Tubes and flues 923.54 sq ft (85.800 m2)  • Firebox 118.42 sq ft (11.002 m2) Superheater: ​  • Heating area 184.50 sq ft (17.141 m2) Cylinders Two, outside Cylinder size 17.5 in × 26 in (444 mm × 660 mm)

Performance figures Tractive effort 21,490 lbf (95.6 kN) Factor of adh. 5.08

Career Operators British Railways Power class 3MT Numbers 82000–82044 Axle load class Route availability 4 BR (WR): yellow Withdrawn February 1964 – July 1967 Disposition All original locomotives scrapped; one new-build under construction

The BR Standard Class 3 2-6-2T was a class of steam locomotive designed by Robert Riddles for British Railways. It was essentially a hybrid design, the chassis being closely based on and sharing a number of parts with the LMS Ivatt Class 4, and having a boiler derived from a GWR No.2 boiler as fitted to the GWR Large Prairie 2-6-2T and 5600 Class 0-6-2T tank engines.

The design and construction took place at the ex-GWR Swindon Works, along with the 2-6-0 tender engine version of the class. Although the boiler shared flanged plates with the GWR No.2 boiler the barrel was shortened by  5 ¹³⁄₁₆ inches and a dome added. Strangely they did not share the same design of wheels as the Doncaster-designed BR Standard Class 4 2-6-0 (76XXX), which also had 5 ft 3 in (1,600 mm) driving wheels and the same piston stoke, and hence crank-pin throw.

In common with a number of the other BR Standard Classes, the chassis design used a number of LMS-designed components including Brake Hanger Brackets, Flexible Stretcher Brackets and Reversing Shaft Brackets.

The cylinder covers of engines as built were fitted with "screw-in" type pressure relief valves. From September 1955 revised cylinder covers were introduced for renewals incorporating "bolt-on" type pressure relief valves.

Although the chassis had many almost identical parts to the LMS Ivatt Class 4 the motion brackets were derived from the design of those fitted to the LMS Ivatt Class 2 2-6-0 and LMS Ivatt Class 2 2-6-2T.

Unlike a number of the larger BR Standards the exhaust steam manifold within the smokebox saddle was a steel fabrication that was part of the welded saddle. In a number of the large BR standards (BR Standard Class 6 and Class 7 engines) the exhaust steam manifold was a steel casting welded into the saddle during manufacture.