LNER Thompson Class O1

No. 63786, rebuilt from ex-GC Class O4 No. 6515 at Killamarsh 1963

Type and origin
Power type	Steam
Designer	Edward Thompson
Builder	LNER
Build date	1944
Total produced	58

Specifications
Configuration	2-8-0
UIC class	1'D
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm) standard gauge
Driver dia.	4 ft 8 in (1.422 m)
Loco weight	73.3 long tons (74.5 t; 82.1 short tons)
Fuel type	Coal
Boiler pressure	225 psi (1.55 MPa)
Cylinders	Two, outside
Cylinder size	20 in × 26 in (508 mm × 660 mm)

Performance figures
Tractive effort	35,520 lbf (158.0 kN)

Career
Power class	8F
Axle load class	Route Availability 6
Disposition	All scrapped

The London and North Eastern Railway (LNER) Thompson Class O1 was a class of 2-8-0 steam locomotive designed by Edward Thompson for freight work. None have survived to preservation.

Construction

Because of wartime restrictions on new-build locomotives, they were rebuilds of LNER Class O4 "ROD" 2-8-0s built before and during World War I, although most of the locomotive was replaced during this rebuild. The first LNER rebuild took place in February 1944, and 58 locomotives were rebuilt to class O1 in total, with the last being locomotive 63856 in October 1949 during the early British Railways era, after which the programme was halted.^[1] The main modification to the original Great Central Railway Class 8K design was the incorporation of a standard LNER 100A boiler, Walschaerts valve gear and new cylinders.

British Railways

The locomotives passed to British Railways (BR) Eastern and North Eastern Regions on 1 January 1948 and were given BR running numbers in the range 63570-63920. However, this range included many unrebuilt O4s.^[2]

Preservation

None of the Thompson O1s have been secured for preservation.

Models

Hornby make models of the O1s in OO gauge.

63760 at Gorton loco shed on 8 November 1958. This O1 is unusual in being fitted with two air pumps just in front of the cab for operation of heavy iron ore trains from Tyne Dock to Consett steel works.

References

↑ Rowledge, J.W.P. (1977). Heavy Goods Engines of the War Department, Volume 1, ROD 2-8-0. Springmead Railway Books. pp. 66–68.
↑ Ian Allan (Summer 1961). ABC of British Railways Locomotives, part 4. pp. 36–37.

External links

Wikimedia Commons has media related to LNER Thompson Class O1.

London and North Eastern Railway locomotives

Pre-grouping railway designs:

Great Central:	A5 B1/B18 B2/B19 B3 B4 B5 B6 B7 B8 B9 C4 C5 C13 C14 D5 D6 D7 D8 D9 D10 D11 D12 E2 E3 E8 F1 F2 G3 J8 J9 J10 J11 J12 J13 J58 J59 J60 J61 J62 J63 L1/L3 M1 N4 N5 N6 O4 O5 Q4 S1 X4 Y2

Great Eastern:	B12 D13 D14 D15 D16 E4 F3 F4 F5 F6 F7 G4 J14 J15 J16 J17 J18 J19 J20 J65 J66 J67 J68 J69 J70 N7 Y4 Y5 Y6 Z4/J92

Great North of Scotland:	D38 D39 D40 D41 D42 D43 D44 D45 D46 D47 D48 G10 J90 J91 Z4 Z5

Great Northern:	A1 C1 C2 C12 D1 D2 D3 D4 E1 G1 G2 J1 J2 J3 J4 J5 J6 J7 J50 J51 J52 J53 J54 J55 J56 J57 K1 K2 K3 N1 N2 O1 O2 Q1 Q2 Q3 R1

North British:	C10 C11 C15 C16 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 D35 D36 D50 D51 E7 G7 G8 G9 J31 J32 J33 J34 J35 J36 J37 J81 J82 J83 J84 J85 J86 J88 N14 N15 Y9 Y10

North Eastern:	A2 A6 A7 B13 B14 B15 B16 C6 C7 C8 D17/1 D17/2 D18 D19 D20 D21 D22 D23 E5 E6 F8 G5 G6 H1 J21 J22 J24 J25 J26 J27 J71 J72 J73 J74 J76 J77 J78 J79 N8 N9 N10 Q5 Q6 Q7 T1 X1 X2 X3 Y7 Y8 EB1 EE1 EF1 ES1

North Eastern (ex Hull & Barnsley)	D24 J23 J28 J75 J80 N11 N12 N13 Q10

LNER designs:

Gresley (1923–1941):	A1 A3 A4 A8 B17 D49 J38 J39 J50 K4 P1 P2 U1 V1 V2 V3 V4 W1 EM1

Thompson (1941–1946):	A1 A2/1 A2/2 A2/3 B1 B2 K1 K5 L1 O1 Q1

Peppercorn (1946–1947):	A1 A2 K1

Other designs:

Proposed designs:

P10 2-8-2T (Nov 1929)
B 4-6-0 (Nov 1936)
? 4-8-2 (1939)
Q 0-8-0 (June 1930)
D 4-4-0 (1943)
? 4-8-4 (Feb 1946)
? 4-8-2 (Feb 1946)
K 2-6-0 (Aug 1947)

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