GWR 7800 Class 7808 Cookham Manor

4 ft 8+1⁄2 in (1,435 mm) standard gaugeLeading dia.3 ft 0 in (914 mm)Driver dia.5 ft 8 in (1,727 mm)Minimum curve6 chains (396 ft; 121 m) normal,
5 chains (330 ft; 101 m) slowWheelbaseLoco: 27 ft 1 in (8.26 m)
Loco & tender: 52 ft 1+3⁄4 in (15.89 m)Length61 ft 9+1⁄4 in (18.83 m)Width8 ft 11 in (2.718 m)Height13 ft 0 in (3.962 m)Axle load17 long tons 5 cwt (38,600 lb or 17.5 t) (19.3 short tons)Loco weight68 long tons 18 cwt (154,300 lb or 70 t) (77.2 short tons) fullTender weight40 long tons 0 cwt (89,600 lb or 40.6 t) (44.8 short tons) fullFuel typeCoalFuel capacity7 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:​ • Grate area22.1 sq ft (2.05 m²)BoilerGWR Standard No. 14^[1]Boiler pressure225 psi (1.55 MPa)Heating surface:​ • Firebox140.0 sq ft (13.01 m²) • Tubes and flues1,285.5 sq ft (119.43 m²)Superheater:
​ • Heating area160.0 sq ft (14.86 m²)CylindersTwo, outsideCylinder size18 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	7800 'Manor' Class
Numbers	7808
Retired	December 1965
Current owner	Great Western Society

7808 Cookham Manor is a Great Western Railway 7800 'Manor' Class steam locomotive. It was built in 1938 at Swindon Works, withdrawn from service in December 1965 and purchased directly from British Railways for preservation by John Mynors, a member of the Great Western Society, in 1965–66.^[2] 'Cookham Manor' was the only 'Manor' Class locomotive to have been bought directly from BR. Initially it was stored at Ashchurch, until moving to Didcot in August 1970.^[3]

It was said to be considered highly by the crews that operated it, and unusually for the class, the locomotive was fitted with a larger 4,000-imperial-gallon (18,000 L; 4,800 US gal) water tender.

The locomotive initially saw considerable main line use soon after preservation, but is currently on static display awaiting a major overhaul at Didcot Railway Centre.

The locomotive cost £3,986 excluding the tender when built in 1938, and had travelled 913,744 miles (1,470,528 km) by 28 December 1963.^[3]

The allocations of 'Cookham Manor' during its service for the GWR and British Railways.^[3]

Date	Location
March 1938	Old Oak Common
April 1939	Gloucester
April 1946	Oswestry
Dec 1953	Bristol (St Philips Marsh)
Dec 1954	Gloucester
June 1959	Newton Abbot
September 1960	Exeter
October 1960	Worcester
December 1960	Tyseley
September 1962	Reading
August 1964	Swindon
November 1964	Gloucester
December 1965	Withdrawn