GWR 1000 Class

GWR 1000 "County" class
1013 County of Dorset at Gloucester Eastgate railway station, 1953.
Type and origin Power type Steam Designer Frederick Hawksworth Builder GWR Swindon Works Order number Lots 354, 358 Build date August 1945 – April 1947 Total produced 30
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2'Ch2 Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 0 in (914 mm) Driver dia. 6 ft 3 in (1,905 mm) Minimum curve 8 chains (528 ft; 161 m) normal, 7 chains (462 ft; 141 m) slow Length 63 ft 0 1⁄4 in (19.21 m) Width 8 ft 11 1⁄8 in (2.721 m) Height 13 ft 5 in (4.089 m) Axle load 19 long tons 14 cwt (44,100 lb or 20 t) (22.1 short tons) full Adhesive weight 59 long tons 2 cwt (132,400 lb or 60 t) (66.2 short tons) full Loco weight 76 long tons 17 cwt (172,100 lb or 78.1 t) (86.1 short tons)full Tender weight 49 long tons 0 cwt (109,800 lb or 49.8 t) (54.9 short tons) full Fuel type Coal Fuel capacity 7 long tons 0 cwt (15,700 lb or 7.1 t) (7.8 short tons) Water cap 4,000 imp gal (18,000 l; 4,800 US gal) Firebox:  • Firegrate area 28.84 sq ft (2.679 m2) Boiler GWR type 15 Boiler pressure 280 psi (1.93 MPa) later reduced to 250 psi (1.72 MPa) Heating surface:  • Tubes and flues 1,545.0 sq ft (143.54 m2)  • Firebox 169.0 sq ft (15.70 m2) Superheater: ​  • Heating area 254.0 sq ft (23.60 m2) Cylinders Two, outside Cylinder size 18.5 in × 30 in (470 mm × 762 mm) Valve gear Stephenson Valve type piston valves
Performance figures Tractive effort 32,580 lbf (144.92 kN), later reduced to 29,090 lbf (129.40 kN)
Career Operators Great Western Railway British Railways Class GWR: 1000 Power class GWR: D BR: 6MT Numbers 1000–1029 Axle load class GWR: Red Retired September 1962 – November 1964 Disposition All original locomotives scrapped; replica under construction

The Great Western Railway 1000 Class or County Class was a class of 4-6-0 steam locomotive. Thirty examples were built between 1945 and 1947, but all were withdrawn and scrapped in the early 1960s. No examples were preserved but a replica locomotive is under construction.

Background

These locomotives were the final development of the two-cylinder Saint Class introduced in 1901 and included several features that had already been used on the successful Modified Hall class.^[1] The Chief Mechanical Engineer of the GWR Frederick W. Hawksworth had hoped to design a new 4-6-2 (Pacific) express locomotive for post war traffic, when he took up office in 1941 but had been prevented by the war from doing so.^[2] This scheme was not entirely dead in 1945 when he was given the authority to build another batch of mixed traffic 4-6-0s. Rather than build more examples of existing designs, Hawksworth introduced the County Class as a testbed for a number of the ideas he hoped to incorporate into the Pacific at a later date.^[3] Unfortunately Hawksworth was not subsequently allowed to build his Pacific, as there was no need for further express passenger locomotives.

Design

In addition to the innovations already adopted for the Modified Hall class, the new class contained several further changes from usual Great Western practice including the use of double chimneys on certain members and a high boiler pressure of 280psi (although this was later lowered in an attempt to reduce maintenance costs). The boiler was a development that used the tooling for the LMS Stanier Class 8F boiler, Hawksworth being able to study this design closely when 8Fs were being built at Swindon as part of the war effort.^[1] The class initially had a tractive effort of 32,580 lbf (144.92 kN), which was =1,000 lbf (4.45 kN) greater than a Castle Class locomotive, although the tractive effort was reduced to 29,090 lbf (129.40 kN) when the boiler pressure was lowered. The class had continuous splashers over the driving wheels and, when named, straight nameplates, making them immediately recognisable from other 4-6-0 classes. They were also fitted with Hawksworth’s 4,000 imp gal (18,000 l; 4,800 US gal) slab-sided tenders, but the County tenders had a water tank six inches wider than the tenders built for the Modified Halls and retro-fitted to many earlier designs.

There was talk of them at one point having outside Walschaerts valve gear which would have been a major break from traditional GWR designs. In the event the favoured inside Stephenson link motion of the GWR was used, but the GWR 1500 Class, also designed by Hawksworth, used outside Walschaerts^{[lower-roman 1]} – the only standard gauge locomotive designed by the GWR to do so.

Production

The first batch of twenty were built at Swindon Works and delivered between August 1945 and March 1946 (Lot No. 354). They were originally unnamed and were planned to be numbered in the 9900 series, but this was changed to 1000-1019 before introduction.^[1] A second batch of ten further locomotives (1020-1029) were built between April 1946 and April 1947 (Swindon Lot 358). The second batch were given names English and Welsh Counties previously used on the GWR 3800 Class of 4-4-0 tender locomotives that were part of George Jackson Churchward's locomotive standardisation programme in the early days of the 20th century.

Operation

1011 'County of Chester' at Bristol Temple Meads 1963

The Counties had a mixed reception: some traditionalists regarded them as ‘non-standard, expensive and unnecessary,’^[4] others considered them a successful, free steaming design, well suited to express or freight work and a fitting finale to GW two-cylinder 4-6-0 development. According to O.S. Nock ‘their best and really brilliant work was done north of Wolverhampton where they ran very heavy trains with conspicuous success.’^[5]

1019 County of Merioneth at Bristol Temple Meads, 1960

British Railways

After the nationalisation of Britain's railways in 1948 all 30 Counties continued to do useful work throughout the Western Region of British Railways, working with Castles on expresses to and from Paddington as well as more menial freight and parcels tasks. BR gave the Counties the power classification 6MT.^[6] Speedometers were fitted to the class from 1950 and modified double from 1956.

Withdrawal and Preservation

Withdrawals of the class took place between September 1962 and November 1964 and none of the original locomotives survived. However a replica is being built at the Didcot Railway Centre, home of the Great Western Society. When completed it will take the name and number of No. 1014 County of Glamorgan in recognition of the late Dai Woodham's Barry Scrapyard in Glamorganshire from which many withdrawn steam locomotives were saved for preservation. Also Glamorganshire County Council donated the frames and boiler for the project. The replica is based around the frames from Modified Hall Class 7927 Willington Hall and the boiler from LMS Stanier 8F 48518. The boiler from the Hall will be used in the replica Grange project at the Llangollen Railway. It will also have a number of smaller original parts off scrapped County locomotives including the chimney from 1006 County of Cornwall.

Models

Hornby Railways manufacture a model of the 10xx in OO gauge.

Stock list

Notes

References

• le Fleming, H.M. (November 1960) [1953]. White, D.E., ed. Part 8: Modern Passenger Classes. The Locomotives of the Great Western Railway (2nd ed.). Kenilworth: RCTS. ISBN 0-901115-19-3.
• Nock, Oswald Stevens (1984). British Locomotives of the Twentieth Century. 2: 1930-1960. London: Book Club Associates.
• Whitehurst, Brian (1973). Great Western Engines, Names, Numbers, Types and Classes (1940 to Preservation). Oxford, UK: Oxford Publishing Company. pp. 16, 103, 124. ISBN 978-0-9028-8821-0. OCLC 815661.

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External links

• 1000 'County' class
• GWR Class 1000 4-6-0 County
• Details of County to be built at Didcot Railway Centre