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 classification 1′C1′ h2t
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Leading wheel
diameter		 3 ft 0 in (0.914 m)
Driver diameter 5 ft 3 in (1.600 m)
Trailing wheel
diameter		 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)
Weight on drivers 48.75 long tons (49.53 t)
Locomotive weight 74.05 long tons (75.24 t)
Fuel type Coal
Fuel capacity 3.00 long tons (3.05 t)
Water capacity 1,500 imp gal (6,800 l; 1,800 US gal)
Boiler BR6
Boiler pressure 200 psi (1.38 MPa)
Firegrate area 20.35 sq ft (1.891 m2)
Heating surface:
– Tubes and flues		 923.54 sq ft (85.800 m2)
– Firebox 118.42 sq ft (11.002 m2)
Superheater 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
adhesion		 5.08
Career
Operator(s) British Railways
Power class 3MT
Number(s) 82000–82044
Axle load class Route availability 4
BR (WR): yellow
Withdrawn February 1964 – July 1967
Disposition All scrapped

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.

Design details

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.[1]

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.[2] 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.[3]

Service

From new, they were based on the Western Region, Southern Region, North Eastern Region and London Midland Region. The class had a short life as most of the work that they had been built for soon disappeared with the branch lines and the introduction of DMU services on shorter routes. The shortest lived was 82043, only 8 years 8 months old at withdrawal; the longest lived was 82019, two months short of its fifteenth birthday. The class' design life, however, was 40 years.

The last two Class 3 tanks in service were nos. 82019 and 82029 at Nine Elms but four more survived until after the end of steam. Nos. 82000, 82003, 82031 and 82034 were transferred from North Wales at the end of 1966 to Patricroft shed in Manchester for use on local suburban trains. They were not really required there however, but nevertheless they lingered there until the shed's closure in 1968. One of these four had run very few miles since its final overhaul, and enquiries were made about saving it, but the price being asked (£1,500 - a lot of money in 1968) was too high and they went for scrap at Cashmore's in Newport, South Wales, being broken up as late as October 1968.

Accidents and incidents

New build of additional member of class

None of the class have survived into preservation. A registered charity, the 82045 Locomotive Trust, is building a "new" class 3 tank locomotive to carry the next number in line had it been built under BR auspices. The Trust believes that a sprightly performance will be delivered through the 17½" x 26" cylinders. This; coupled with their modest axle load will make it an ideal design for today's heritage railways.

The frames, on display at the Severn Valley Railway, are now nearing completion riveting is in an advanced state. Further parts and patterns continue to be amassed with wheels and axle-boxes cast and cylinders on order. With construction work on the new engine advancing every week the Trust classifies 82045 as the 1001st steam locomotive to a BR Standard design since the commencement of its construction follows that of 72010 Hengist.[5]

Unlike a number of other "new-build" projects the group building 82045 will equip the locomotive with a traditional riveted boiler complete with copper firebox.

The 16-spoke driving wheels from BR standard class 4 2-6-0 No.76080 – which was broken up at Barry scrapyard in the early 80s – and now stored at Eardington Halt, were to be used for the new build. However, the subsequent discovery that the BR standard class 3s were fitted with 17-spoke wheels of the same diameter has led to the decision that these will not be used. The Engine House management have agreed for the wheelset from 76080 to become an external exhibit there.

The 82045 Locomotive Trust believes that significant costs will be avoided as many of the required cast parts can be made from patterns held by fellow members of the British Railways Standard Locomotive Owners Group (BRSLOG) including the pattern for the Pony Truck Wheels.

Livery and numbering

When delivered new the class all carried BR lined MT black livery. From 1957 onwards, those members of the class based on the Western Region started to receive lined green livery. From the early 1960s, some Western Region class members also received unlined green livery as an economy measure. Those class members allocated to other regions retained lined black livery until withdrawal.

One curiosity was 82044 which was painted in green livery by the Western Region but then repainted in black livery after it was transferred away. During this repaint, it mistakenly received a power classification 4 numeral which it carried until withdrawal.

Modelling

Tri-ang produced an OO Gauge model of the locomotive in BR Green and BR Black although this was by modern standard under-detailed being produced in the 1960s, but Bachmann announced a brand new OO gauge model in February 2009.

An N gauge version has also been released by Bachmann under their Graham Farish brand.

Images

Footnotes

  1. ↑ Rear cylinder cover to BR drawing SL/SW/35 being superseded by SL/SW/666 and front cylinder cover to drawing SL/SW/85 being superseded by SL/SW/667 for renewals from September 1955.
  2. ↑ Confirmed on original BR drawing SL/SW/616 sourced from the NRM
  3. ↑ Confirmed on original BR drawing SL/DE/19620 sourced from the NRM
  4. ↑ Hoole, Ken (1983). Trains in Trouble: Vol. 4. Truro: Atlantic Books. p. 11. ISBN 0-906899-07-9.
  5. ↑ "The 82045 Steam Locomotive Trust".

References

External links

Wikimedia Commons has media related to BR Standard Class 3 2-6-2T.