LNER Class P2

Specifications
Specifications
Configuration:;
• Whyte	2-8-2
Leading dia.	3 ft 2 in (0.97 m)
Driver dia.	6 ft 2 in (1.88 m)
Trailing dia.	3 ft 8 in (1.12 m)
Wheelbase	37 ft 11 in (11.56 m) engine ; 16 ft 0 in (4.88 m) tender ; 64 ft 0.875 in (19.52943 m) total
Axle load	20 long tons (20 t) locomotive approx.
Loco weight	110 long tons 5 cwt (247,000 lb or 112 t) max.
Tender weight	55 long tons 6 cwt (123,900 lb or 56.2 t) max.
Firebox:
• Grate area	50 sq ft (4.6 m2)
Boiler	6 ft 5 in (1.96 m) max. diameter
Boiler pressure	220 psi (1.5 MPa)
Heating surface:
• Firebox	237 sq ft (22.0 m2)
• Tubes	1,354.2 sq ft (125.81 m2)
• Flues	1,122.8 sq ft (104.31 m2)
• Total surface	3,349.5 sq ft (311.18 m2)
Superheater:;
• Heating area	635.5 sq ft (59.04 m2)
Cylinders	3
Cylinder size	21 in × 26 in (530 mm × 660 mm)
Valve gear	No. 2001 as built: Lentz rotary cam; No. 2001 from April 1938 and nos. 2002–6: Walschaerts outside, Gresley conjugated inside
Valve type	No. 2001 as built: Poppet, 8 inch (inlet) and 9 inch (exhaust); No. 2001 from April 1938 and nos. 2002–6: piston valves, 9 inch

Type and origin
Type and origin
Power type	Steam
Designer	Nigel Gresley
Builder	Doncaster Works
Build date	1934-1936
Total produced	6

LNER Class P2
LNER Class P2
	LNER P2 No. 2001, Cock O' The North
Power type
Type and origin
Power type	Steam
Designer	Nigel Gresley
Builder	Doncaster Works
Build date	1934-1936
Total produced	6
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
Leading dia.	3 ft 2 in (0.97 m)
Driver dia.	6 ft 2 in (1.88 m)
Trailing dia.	3 ft 8 in (1.12 m)
Wheelbase	37 ft 11 in (11.56 m) engine ; 16 ft 0 in (4.88 m) tender ; 64 ft 0.875 in (19.52943 m) total
Axle load	20 long tons (20 t) locomotive approx.
Loco weight	110 long tons 5 cwt (247,000 lb or 112 t) max.
Tender weight	55 long tons 6 cwt (123,900 lb or 56.2 t) max.
Firebox:
• Grate area	50 sq ft (4.6 m2)
Boiler	6 ft 5 in (1.96 m) max. diameter
Boiler pressure	220 psi (1.5 MPa)
Heating surface:
• Firebox	237 sq ft (22.0 m2)
• Tubes	1,354.2 sq ft (125.81 m2)
• Flues	1,122.8 sq ft (104.31 m2)
• Total surface	3,349.5 sq ft (311.18 m2)
Superheater:;
• Heating area	635.5 sq ft (59.04 m2)
Cylinders	3
Cylinder size	21 in × 26 in (530 mm × 660 mm)
Valve gear	No. 2001 as built: Lentz rotary cam; No. 2001 from April 1938 and nos. 2002–6: Walschaerts outside, Gresley conjugated inside
Valve type	No. 2001 as built: Poppet, 8 inch (inlet) and 9 inch (exhaust); No. 2001 from April 1938 and nos. 2002–6: piston valves, 9 inch
Tractive effort
Performance figures
Tractive effort	43,462 lbf (193.33 kN) at 85% boiler pressure
Operators
Career
Operators	London and North Eastern Railway
Retired	1943-1944
Disposition	All original locomotives rebuilt as Thompson A2/2 Class.; Two more are under construction
	Technical parameters: The Engineer. 1 June 1934 p.551 (refer to original design of No.2001)

The London and North Eastern Railway Class P2 was a class of 2-8-2 steam locomotives designed by Sir Nigel Gresley for working heavy express trains over the harsh Edinburgh to Aberdeen Line. As they were to serve on Scottish expresses, they were given famous names from Scottish lore.

Six locomotives of the class were built; introduced between 1934 and 1936. In 1936, the Class P2 were given streamlined fronts, similar to that of the Class A4. Between 1943 and 1944 the class were rebuilt under Gresley's successor Edward Thompson into the LNER Thompson Class A2/2 4-6-2 type.

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