British Rail 10100

Specifications
Specifications
Configuration:;
• Whyte	4-8-4
• UIC	2′D2′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	39 in (0.991 m)
Driver dia.	51 in (1.295 m)
Minimum curve	5 chains (101 m)
Wheelbase	41 ft 4 in (12.60 m)
Length	50 ft 0 in (15.24 m)
Width	9 ft 0 in (2.74 m)
Height	13 ft 0 in (3.96 m)
Loco weight	120 long tons (122 t; 134 short tons)
Fuel capacity	720 imp gal (3,300 L; 860 US gal)
Coolant cap.	60 imp gal (270 L; 72 US gal)
Water cap.	500 imp gal (2,300 L; 600 US gal)
Prime mover	Paxman 12RPH, x 4
Cylinder size	7 in × 7+3⁄4 in (178 mm × 197 mm)
Transmission	Vulcan Sinclair SCRD fluid; Fell central gearbox
Train heating	Steam generator
Train brakes	Vacuum

Type and origin
Type and origin
Power type	Diesel-mechanical
Builder	LMS, Derby Works
Build date	1951

British Railways 10100
British Railways 10100
	The Fell Diesel at Derby Works in June 1957
Power type
Type and origin
Power type	Diesel-mechanical
Builder	LMS, Derby Works
Build date	1951
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-4
• UIC	2′D2′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	39 in (0.991 m)
Driver dia.	51 in (1.295 m)
Minimum curve	5 chains (101 m)
Wheelbase	41 ft 4 in (12.60 m)
Length	50 ft 0 in (15.24 m)
Width	9 ft 0 in (2.74 m)
Height	13 ft 0 in (3.96 m)
Loco weight	120 long tons (122 t; 134 short tons)
Fuel capacity	720 imp gal (3,300 L; 860 US gal)
Coolant cap.	60 imp gal (270 L; 72 US gal)
Water cap.	500 imp gal (2,300 L; 600 US gal)
Prime mover	Paxman 12RPH, x 4
Cylinder size	7 in × 7+3⁄4 in (178 mm × 197 mm)
Transmission	Vulcan Sinclair SCRD fluid; Fell central gearbox
Train heating	Steam generator
Train brakes	Vacuum
Maximum speed
Performance figures
Maximum speed	84 mph (135 km/h)
Power output	2,000 bhp (1,500 kW) at 1,500 rpm
Tractive effort	25,000 lbf (111 kN)
Brakeforce	38 long tons-force (380 kN)
Operators
Career
Operators	British Railways
Power class	6P5F, later Type 4
Numbers	10100
Nicknames	Fell Diesel Locomotive
Withdrawn	15 October 1958
Scrapped	Derby Works, July 1960

British Railways 10100 was an unusual experimental diesel locomotive known informally as the Fell diesel locomotive, after Lt Col L. F. R. Fell who was one of the designers. It was the joint production of Davey Paxman & Co, Shell Refining & Marketing Co and Lt Col L. F. R. Fell, built for them by the London, Midland and Scottish Railway at Derby. Sir Harry Ricardo was also involved. By the time it emerged in 1950, nationalisation had taken place and it carried British Railways livery. The locomotive had six diesel engines, four of them used for traction. There were two auxiliary engines, both of which were 150 hp (110 kW) AEC 6-cylinder units, and these drove the superchargers for the main engines and the purpose of this arrangement was to enable the main engines to deliver very high torque at low crankshaft speed.