British Rail 10800

Specifications
Specifications
Configuration:;
• Whyte	Bo-Bo
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 6 in (1.067 m)
Minimum curve	3.75 chains (247.50 ft; 75.44 m)
Wheelbase	31 ft 0 in (9.45 m)
Length	41 ft 10+1⁄2 in (12.76 m)
Width	9 ft 2 in (2.79 m)
Height	12 ft 9+1⁄2 in (3.90 m)
Loco weight	69.80 long tons (70.92 t; 78.18 short tons)
Fuel capacity	300 imp gal (1,400 L; 360 US gal)
Coolant cap.	85 imp gal (390 L; 102 US gal)
Water cap.	90 imp gal (410 L; 110 US gal)
Prime mover	Paxman 16RPHXL Series 2 ; rebuilt: Maybach MD655
Generator	DC
Traction motors	BTH 159, DC, four (4) off
Cylinder size	7 in × 7+3⁄4 in (177.80 mm × 196.85 mm) ; rebuilt: 7+1⁄4 in × 8+3⁄4 in (184.15 mm × 222.25 mm)
Transmission	Diesel electric
MU working	Not fitted
Train heating	Clarkson steam generator
Loco brake	Brakeforce: 45 long tons-force (450 kN)
Train brakes	Vacuum

Type and origin
Type and origin
Power type	Diesel-electric
Builder	North British Locomotive Company
Serial number	26413
Build date	1 July 1950

British Railways 10800
British Railways 10800
	10800 at North British Locomotive Company, Glasgow
Power type
Type and origin
Power type	Diesel-electric
Builder	North British Locomotive Company
Serial number	26413
Build date	1 July 1950
Configuration:;
Specifications
Configuration:;
• Whyte	Bo-Bo
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 6 in (1.067 m)
Minimum curve	3.75 chains (247.50 ft; 75.44 m)
Wheelbase	31 ft 0 in (9.45 m)
Length	41 ft 10+1⁄2 in (12.76 m)
Width	9 ft 2 in (2.79 m)
Height	12 ft 9+1⁄2 in (3.90 m)
Loco weight	69.80 long tons (70.92 t; 78.18 short tons)
Fuel capacity	300 imp gal (1,400 L; 360 US gal)
Coolant cap.	85 imp gal (390 L; 102 US gal)
Water cap.	90 imp gal (410 L; 110 US gal)
Prime mover	Paxman 16RPHXL Series 2 ; rebuilt: Maybach MD655
Generator	DC
Traction motors	BTH 159, DC, four (4) off
Cylinder size	7 in × 7+3⁄4 in (177.80 mm × 196.85 mm) ; rebuilt: 7+1⁄4 in × 8+3⁄4 in (184.15 mm × 222.25 mm)
Transmission	Diesel electric
MU working	Not fitted
Train heating	Clarkson steam generator
Loco brake	Brakeforce: 45 long tons-force (450 kN)
Train brakes	Vacuum
Maximum speed
Performance figures
Maximum speed	70 mph (110 km/h)
Power output	827 hp (617 kW) ; rebuilt: 1,400 hp (1,000 kW)
Tractive effort	34,500 lbf (153.5 kN)
Operators
Career
Operators	British Railways
Power class	3MT; later: Type 1
Numbers	10800
Axle load class	Route availability: 4
Retired	8 August 1959
Disposition	Sold to Brush Traction, rebuilt into research locomotive Hawk, retired 1968, cannibalised 1972–1976, scrapped 1976.

British Railways 10800 was a diesel locomotive built by the North British Locomotive Company for British Railways in 1950. It had been ordered by the London, Midland and Scottish Railway in 1946 but did not appear until after the 1948 nationalisation of the railways.

The locomotive was designed by George Ivatt as a possible replacement for steam locomotives on secondary and branch lines. It was the first British road switcher locomotive. The single-cab layout (long bonnet forward) gave the driver a poor view of the road ahead. However, the driver's view was no worse than that from a steam locomotive cab, so it would have been acceptable at the time.

During its brief time on the Southern Region between 1952 and 1954, 10800 gained the nickname 'The Wonder Engine', from the locomotive department's daily query, 'I wonder if it will go today'.