LMS Royal Scot Class

Specifications
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h3
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 3+1⁄2 in (1.003 m)
Driver dia.	6 ft 9 in (2.057 m)
Length	63 ft 0+1⁄2 in (19.22 m)
Loco weight	84.90 long tons (86.26 t; 95.09 short tons)
Tender weight	New: 42.70 long tons (43.39 t; 47.82 short tons); later: 54.65 long tons (55.53 t; 61.21 short tons)
Water cap.	New: 3,500 imp gal (16,000 L; 4,200 US gal); later: 4,000 imp gal (18,000 L; 4,800 US gal)
Tender cap.	New: 5.5 long tons (5.6 t; 6.2 short tons); later: 9 long tons (9.1 t; 10 short tons)
Boiler	G10¼S; rebuilt: 2A
Boiler pressure	250 psi (1.72 MPa) superheated
Cylinders	Three
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves

Type and origin
Type and origin
Power type	Steam
Designer	Sir Henry Fowler; rebuilt: Sir William Stanier
Builder	North British Locomotive Company (50); LMS, Derby Works (20);
Order number	LMS Lot 41 (50) and 73 (20)
Serial number	NBL: 23595–23644
Build date	1927, 1930
Total produced	70
Rebuilder	LMS Derby Works
Rebuild date	1943–1955

LMS Royal Scot Class
LMS Royal Scot Class
	LMS Royal Scot class No. 6137 'Vesta', 1928.
Power type
Type and origin
Power type	Steam
Designer	Sir Henry Fowler; rebuilt: Sir William Stanier
Builder	North British Locomotive Company (50); LMS, Derby Works (20);
Order number	LMS Lot 41 (50) and 73 (20)
Serial number	NBL: 23595–23644
Build date	1927, 1930
Total produced	70
Rebuilder	LMS Derby Works
Rebuild date	1943–1955
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h3
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 3+1⁄2 in (1.003 m)
Driver dia.	6 ft 9 in (2.057 m)
Length	63 ft 0+1⁄2 in (19.22 m)
Loco weight	84.90 long tons (86.26 t; 95.09 short tons)
Tender weight	New: 42.70 long tons (43.39 t; 47.82 short tons); later: 54.65 long tons (55.53 t; 61.21 short tons)
Water cap.	New: 3,500 imp gal (16,000 L; 4,200 US gal); later: 4,000 imp gal (18,000 L; 4,800 US gal)
Tender cap.	New: 5.5 long tons (5.6 t; 6.2 short tons); later: 9 long tons (9.1 t; 10 short tons)
Boiler	G10¼S; rebuilt: 2A
Boiler pressure	250 psi (1.72 MPa) superheated
Cylinders	Three
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves
Tractive effort
Performance figures
Tractive effort	33,150 lbf (147.46 kN)
Operators
Career
Operators	London, Midland and Scottish Railway; → British Railways;
Power class	6P; reclassified 7P in 1951
Numbers	LMS: 6100–6169; BR: 46100–46169;
Axle load class	BR: Route Availability 9
Disposition	All rebuilt to LMS Rebuilt Royal Scot Class

The London, Midland and Scottish Railway (LMS) Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers, and were in effect two classes.

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