GWR 7800 Class

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GWR 7800 "Manor" Class
Bradley Manor Kidderminster.jpg
British Railways Class 78xx No. 7802 'Bradley Manor' at Kidderminster Town on the Severn Valley Railway
Type and origin
Power type Steam
Builder GWR/BR Swindon Works
Order number Lot 316, Lot 377
Build date 1938–1939, 1950
Total produced 30
Specifications
Configuration:
 • Whyte 4-6-0
 • UIC 2'Ch2
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Leading dia. 3 ft 0 in (914 mm)
Driver dia. 5 ft 8 in (1,727 mm)
Minimum curve 8 chains (528 ft; 161 m) normal,
7 chains (462 ft; 141 m) slow
Wheelbase Loco: 27 ft 1 in (8.26 m)
Loco & tender: 52 ft 1 34 in (15.89 m)
Length 61 ft 9 14 in (18.83 m)
Height 13 ft 0 in (3.962 m)
Axle load 17 long tons 5 cwt (38,600 lb or 17.5 t) (19.3 short tons)
Loco weight 68 long tons 18 cwt (154,300 lb or 70 t) (77.2 short tons) full
Tender weight 40 long tons 0 cwt (89,600 lb or 40.6 t) (44.8 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 3,500 imp gal (16,000 l; 4,200 US gal)
Firebox:
 • Firegrate area
22.1 sq ft (2.05 m2)
Boiler GWR type 14
Boiler pressure 225 psi (1.55 MPa)
Heating surface:
 • Tubes and flues
1,285.5 sq ft (119.43 m2)
 • Firebox 140.0 sq ft (13.01 m2)
Superheater:
 • Heating area 160.0 sq ft (14.86 m2)
Cylinders Two, outside
Cylinder size 18 in × 30 in (457 mm × 762 mm)
Performance figures
Tractive effort 27,340 lbf (121.61 kN)
Career
Operators Great Western Railway
British Railways
Class GWR: 7800 "Manor"
Power class GWR: D
BR: 5MT
Number in class 30
Axle load class GWR: Blue
Retired April 1963 – December 1965
Disposition 21 scrapped, 9 preserved

The Great Western Railway (GWR) 7800 Class or Manor Class is a class of 4-6-0 steam locomotive. They were designed as a lighter version of the GWR Grange Class, giving them a wider Route Availability. Like the 'Granges', the 'Manors' used parts from the GWR 4300 Class Moguls but just on the first batch of twenty. Twenty were built between 1938 and 1939, with British Railways adding a further 10 in 1950. They were named after Manors in the area covered by the Great Western Railway. Nine are preserved.

Background[edit]

Although successful mixed traffic designs, neither the Hall nor the Grange 4-6-0 classes were able to cover the full range of duties previously undertaken by the 4300 Class 2-6-0 locomotives due to their ‘red’ weight classification. By the late 1930s a lighter version of the Grange class was urgently required for those cross-country and branch line duties forbidden to heavier locomotives.[1] A new lighter (Swindon No.14) boiler was therefore designed, and as with the Grange Class, the driving wheels and motion components were recovered from withdrawn members of the 4300 Class.[2] The Manor class, with an axle loading of just over 17 tons, could be utilised on many lines from which the heavier Granges were barred [3]

Building[edit]

The first of the Manors No.7800 Torquay Manor was built at Swindon Works and entered traffic in January 1938. By February 1939 twenty were in service but outbreak of war forced the cancellation of construction of a further batch of twenty locomotives. After nationalisation, the newly created Western Region of British Railways was authorised to build ten more of the class. Nos.7820-29 at Swindon in November and December 1950. A batch of ten other locomotives was planned to be released, but the batch was cancelled.

The cancelled list includes the following:[4]

7830 Norton Manor, 7831 Ogwell Manor, 7832 Pimley Manor, 7833 Ramsbury Manor, 7834 Rodley Manor, 7835 Standen Manor, 7836 Sutton Manor, 7837 Thorton Manor, 7838 Widford Manor, and 7839 Wilcote Manor

Performance[edit]

Unlike the Granges of 1936 where the use of a standard design and the re-use of existing components had produced a masterpiece, the initial performance of the Manors was comparatively mediocre. ‘Were it not for the constraints of war there is every reason to expect that Swindon would have recalled the engines for modifications’[5] There was no attempt to improve the steaming; a British Railway edict permitted construction only of existing pre-nationalisation designs. Subsequent trials showed the engines did not require too much work to correct their faults. Internal alterations to the blastpipe and an increase in air space in the firegrate added to the new type of narrow chimney noticeably improved the draughting. After trials on ten of the class, the improvements became standard after July 1954.

Use[edit]

The first examples were despatched to depots at Wolverhampton, Bristol, Gloucester, Shrewsbury, Westbury in Wiltshire and Neyland in South Wales. In October 1938 No.7805 Broome Manor underwent clearance tests between Ruabon and Barmouth. Subsequently, the class were used over the main lines of the erstwhile Cambrian Railways, with its headquarters and works in Oswestry. The Manors were also successfully employed in the West Country where they were used for banking and piloting trains over the Devon banks between Newton Abbot and Plymouth. Their light axleloading also allowed them across the Tamar Bridge and on to the branch lines of Cornwall.[6]

By 1959 twenty-one Manors were congregated in Mid- and South Wales. Their most prestigious working was the Cambrian Coast Express, where a Manor took over from a King or Castle at Shrewsbury and worked through to Aberystwyth. Others of the class operated in the Birmingham, Gloucester and Hereford areas while the handful stationed at Reading frequently ventured on to the Southern Region line to Guildford and Redhill.[7]

Withdrawal and preservation[edit]

The first Manor to be withdrawn was No.7809 Childrey Manor, of Shrewsbury depot in April 1963 and which was cut up at Swindon. By May 1965 the numbers had been halved and the final two in service, No.7808 Cookham Manor of Gloucester, and No.7829 Ramsbury Manor of Didcot, were condemned in December 1965. Remarkably, for a relatively small class where thirty engines were built, nine examples have been preserved.

Table of withdrawals
Year Quantity in
service at
start of year
Number withdrawn Quantity
withdrawn
Locomotive numbers
1963 30 1 1 7809.
1964 29 12 13 7800/05/06/07/10/15/16/17/23/24/25.
1965 17 17 30 7801/02/03/04/08/11/12/13/14/18/19/20/21/22/26/27/28/29.

Operation in preservation[edit]

All nine members of the Manor class that have survived into preservation have operated at some point in their preserved career and of the nine Manors to survive in preservation, all four of the GWR built Manors have seen main line operation: Nos. 7802 Bradley Manor, 7808 Cookham Manor, 7812 Erlestoke Manor and 7819 Hinton Manor.

In the 1970s, no. 7808 Cookham Manor was used by the Great Western Society (GWS) to haul nine vintage ex-GWR carriages on an annual outing on the main line from Didcot to Birmingham. Today 7808 is on static display inside the GWS shed at Didcot awaiting an overhaul.

7812 Erlestoke Manor only worked a small number of railtours between April and June 1982. Also certified for main line operation in the 1980s was fellow SVR based engine 7819 Hinton Manor. It worked a number of railtours along former Great Western routes including the Cambrian Coast Line. 7812 was until New Year's Eve 2017 operational on the SVR but wasn't main line certified and 7819 is on static display in Swindon.

7802 Bradley Manor was the last and most recent member of the class to have operated on the national network. It is now operational on the Severn Valley Railway after emerging from a complete overhaul in November 2015, however it is not certified to operate on the main line.

None of the BR built Manors have operated on the main line in preservation.

Locomotives[edit]

See List of GWR 7800 Class locomotives for all Manor locomotives built. Nine locomotives have been preserved:

Number Name Built Withdrawn Base Current Location Owner Status Livery Photo Notes
7802 Bradley Manor January 1938 November 1965 Severn Valley Railway Severn Valley Railway Erlestoke Manor Fund Operational, boiler ticket expires: 2025 BR Lined Green, Late Crest Bradley Manor Kidderminster.jpg Currently paired with 7812's tender
7808 Cookham Manor March 1938 December 1965 Didcot Railway Centre Didcot Railway Centre Great Western Society Static Display GWR Unlined Green, Shirtbutton Logo Cookham Manor 7808 Didcot.jpg Final member of class to be withdrawn from service by BR
7812 Erlestoke Manor January 1939 November 1965 Severn Valley Railway Tyseley Locomotive Works Erlestoke Manor Fund Undergoing Overhaul BR Lined Green, Late Crest Class 78xx No 7812 Erlestoke Manor (8063163476).jpg Moved from the SVR by road on 5 Jan 2018, tender now paired with 7802 Bradley Manor. Boiler ticket expired: Dec 2017
7819 Hinton Manor February 1939 November 1965 Severn Valley Railway Severn Valley Railway SVR Rolling Stock Trust Static Display GWR Unlined Green, Shirtbutton Logo 7819 Hinton Manor at Bridgnorth.jpg
7820 Dinmore Manor November 1950 November 1965 Gloucestershire Warwickshire Railway Gloucestershire Warwickshire Railway Dinmore Manor Locomotive Ltd. Operational, boiler ticket expires: 2023 BR Lined Black, Early Emblem 7820 Dinmore Manor.jpg Ran in unlined black from return to service till 2018 when livery was lined out during winter maintenance
7821 Ditcheat Manor November 1950 November 1965 West Somerset Railway Swindon Designer Outlet West Somerset Railway Association Static Display BR Lined Black, Early Emblem Ditcheat Manor Steam museum Swindon.jpg
7822 Foxcote Manor December 1950 November 1965 Llangollen Railway West Somerset Railway Foxcote Manor Society Operational, boiler ticket expires: 2026 BR Unlined Black, Early Emblem Bishops Lydeard - 7822 ready to leave for Minehead.jpg
7827 Lydham Manor December 1950 October 1965 Dartmouth Steam Railway Dartmouth Steam Railway Dart Valley Railway plc Operational, boiler ticket expires: 2021 BR Lined Black, Early Emblem Paignton - 7827 running round.JPG
7828 Odney Manor December 1950 October 1965 West Somerset Railway West Somerset Railway West Somerset Railway Undergoing Repairs BR Lined Green, Early Emblem Norton Manor 7828 near Blue Anchor.jpg Renamed Norton Manor in preservation

Details[edit]

7802 Bradley Manor at Kidderminster Town railway station after a southbound Severn Valley Railway journey from Bridgnorth.
Boiler maximum dia. 5 feet 3 inches (1.60 m)
Boiler minimum dia. 4 feet 7 58 inches (1.413 m)
Boiler length 13 feet 0 5/16 inches
Fire tubes, no. and dia. 158 × 2 inches (51 mm)
Flue tubes, no. and dia. 12 × 5 18 inches (130 mm)
Superheater tubes, no. and dia. 72 × 1 inch (25 mm)

Models[edit]

Prior to 2011, Ixion created a model of the 78xx in N scale. As of 17 November 2011 Dapol purchased the rights to produce the Ixion 78xx. As of February 2017, Dapol offer a Model of 7805 Broome Manor in N gauge including a variant with DCC support.[8]

In 4 mm scale a model has been available from Bachmann, although it is not in the current range.

References[edit]

  1. ^ le Fleming 1962, p. H36
  2. ^ Herring, Peter (2004). Classic British Steam Locomotives. Wigston: Abbeydale Press. p. 140. ISBN 1 86147 138 6. 
  3. ^ Holcroft 1971, p. 156
  4. ^ Waters, Laurence. Great Western Manor Class. p. 19. 
  5. ^ Herring (2004), p.140.
  6. ^ Herring (2004), pp.140-141.
  7. ^ Herring (2004), p.141.
  8. ^ http://dapol.co.uk/shop/n-gauge/steam-locomotives-ngauge/manor
  • Bradley, Rodger (1988). GWR Two Cylinder 4–6–0s and 2–6–0s. Newton Abbot, Devon: David and Charles Publishers plc. 
  • Holcroft, Harold (1971) [1957]. An Outline of Great Western Locomotive Practice 1837-1947 (2nd ed.). Shepperton: Ian Allan. ISBN 0-7110-0228-2. 
  • Whitehurst, Brian (1973). Great Western Engines, Names, Numbers, Types and Classes (1940 to Preservation). Oxford, UK: Oxford Publishing Company. pp. 68–69, 103, 128. ISBN 978-0-9028-8821-0. OCLC 815661. 

External links[edit]