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[1][2]
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[1]
Performance figures
Tractive effort
43,462 lbf (193.33 kN) at 85% boiler pressure
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.
^ abBoddy et al. 1983, pp. 170, 171, 179, 182
^Nock, O. S. (1966). The British Steam Railway Locomotive 1925-1965. Vol. II. Ian Allan. pp. 102–103.
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