GWR 7800 Class
7802 "Bradley Manor", one of the nine preserved locomotives of the original 30 in the class.
|Type and origin|
|Builder||GWR/BR Swindon Works|
|Order number||Lot 316, Lot 377|
|Build date||1938–1939, 1950|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|3 ft 0 in (914 mm)|
|Driver diameter||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 3⁄4 in (15.89 m)
|Length||61 ft 9 1⁄4 in (18.83 m)|
|Height||13 ft 0 in (3.96 m)|
|Axle load||17 long tons 5 cwt (38,600 lb or 17.5 t)|
|Locomotive weight||68 long tons 18 cwt (154,300 lb or 70 t) full|
|Tender weight||40 long tons 0 cwt (89,600 lb or 40.6 t) full|
|Fuel capacity||7 long tons 0 cwt (15,700 lb or 7.1 t)|
|Water capacity||3,500 imp gal (16,000 l; 4,200 US gal)|
|Boiler||GWR type 14|
|Boiler pressure||225 psi (1.55 MPa)|
|Firegrate area||22.1 sq ft (2.05 m2)|
– Tubes and flues
|1,285.5 sq ft (119.43 m2)|
|– Firebox||140.0 sq ft (13.01 m2)|
|Superheater area||160.0 sq ft (14.86 m2)|
|Cylinder size||18 in × 30 in (457 mm × 762 mm)|
|Tractive effort||27,340 lbf (121.61 kN)|
|Operator(s)||Great Western Railway
|Class||GWR: 7800 “Manor”|
|Power class||GWR: D
|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.
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.  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was therefore designed, and as with the Grange Class, the driving wheels and motion components were recovered from withdrawn members of the 4300 Class. 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 
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.
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’ 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.
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. 
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. 
Withdrawal and Preservation
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, nine examples have been preserved, all of which have operated in preservation at one time or another.
Operation in preservation
|This section does not cite any references or sources. (August 2011)|
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.
7812 Erlestoke Manor only worked a small number of railtours in the 1980s. Also certified for mainline operation in the 1980s was fellow SVR based engine 7819 Hinton Manor. She worked a number of railtours along former Great Western routes including the famous Cambrian Coast Line. Both engines also saw use in 1985 during the 150th anniversary of the Great Western Railway with the latter hauling most of the railtours of the 2 engines. During one run in Apr 1985 when 7819 double headed with GWR 6000 King George V After 6000 was failed at Taunton due to an overheated axle box 7819 was tasked with hauling the train onto Plymouth alone, this plan however backfired after 7819 was failed at Exeter due to a hot box. She however was repaired overnight and worked back to Bristol the following day. This was a part of the Severn Valley Railway's significant mainline operations at that time.
Despite being only halfway through its period of mainline certification, 7802 Bradley Manor did not run on the national network beyond 2007. This was because from April 2007 new Network Rail standards were introduced, requiring all preserved steam locomotives operating on the mainline to be fitted with on-train monitoring recorders (OTMR) before the end of 2007. Because it was not planned to put Bradley Manor back on the national network beyond the end of its then current certification, and because the Erlestoke Manor Fund, its owner was dedicating its finances to the overhaul of the other Manor in its care, it was decided to withdraw Bradley Manor. Bradley Manor did however operate for a grace period until the end of 2007.
As of 2014 no Manors operate on the national network, and there are no immediate plans currently in place to alter that situation.
See List of GWR 7800 Class locomotives for all Manor locomotives built. Nine locomotives have been preserved:
|7802||Bradley Manor||Severn Valley Railway||Severn Valley Railway||Erlestoke Manor Fund||Undergoing Overhaul|
|7808||Cookham Manor||Didcot Railway Centre||Didcot Railway Centre||Great Western Society||Static Display|
|7812||Erlestoke Manor||Severn Valley Railway||Severn Valley Railway||Erlestoke Manor Fund||Operational|
|7819||Hinton Manor||Severn Valley Railway||Swindon Designer Outlet||SVR Rolling Stock Trust||Static Display|
|7820||Dinmore Manor||Gloucestershire Warwickshire Railway||Dartmouth Steam Railway||Dinmore Manor Locomotive Ltd.||Operational|
|7821||Ditcheat Manor||West Somerset Railway||STEAM Museum Swindon||West Somerset Railway Association||Static Display|
|7822||Foxcote Manor||Llangollen Railway||Llangollen Railway||Foxcote Manor Society||Operational.|
|7827||Lydham Manor||Dartmouth Steam Railway||Dartmouth Steam Railway||Dart Valley Railway plc||Operational|
|7828||Odney Manor||West Somerset Railway||West Somerset Railway||West Somerset Railway||Operational|
|Boiler maximum dia.||5 feet 3 inches (1.60 m)|
|Boiler minimum dia.||4 feet 7 5⁄8 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 1⁄8 inches (130 mm)|
|Superheater tubes, no. and dia.||72 × 1 inch (25 mm)|
|This section does not cite any references or sources. (June 2014)|
Ixion manufacture a model of the 78xx in N scale.
As of 17 November 2011 Dapol purchased the rights to produce the Ixion 78xx.
In 4 mm scale a model has been available from Bachmann, although it is not in the current range.
- Bradley, Rodger (1988). GWR Two Cylinder 4–6–0s and 2–6–0s. Newton Abbot, Devon: David and Charles Publishers plc.
- Holcroft, Harold (1971) . 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, classes: 1940 to preservation. Oxford: Oxford Publishing Company. pp. 68–69, 103, 128. ISBN 0-902888-21-8. OCLC 815661.
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