NER Class R

NER Class R
NER Class R
LNER Class D20
Power type Steam
Designer Wilson Worsdell
Builder NER Gateshead
Build date 1899-1907
Total produced 60
Configuration 4-4-0
Gauge 1,435 mm (4 ft 8 1⁄2 in)
Leading wheel
diameter		 4 ft 0 in (1.22 m)
Driver diameter 6 ft 10 in (2.08 m)
Wheelbase 23 ft 9 in (7.24 m) engine
12 ft 8 in (3.86 m) tender
45 ft 10 3⁄4 in (13.989 m) total
Axle load 19.8 long tons (20.1 t)
Locomotive weight D20/1: 54.1 long tons (55.0 t)
D20/2: 55.45 long tons (56.34 t)
Tender weight 41.2 long tons (41.9 t)
Locomotive & tender
combined weight		 D20/1: 95.3 long tons (96.8 t)
D20/1: 96.65 long tons (98.20 t)
Fuel type coal
Boiler 4 ft 9 in (1.45 m) diameter
Boiler pressure 200 psi (1.4 MPa)
later reduced to 160 psi (1.1 MPa)
Firegrate area 20 sq ft (1.9 m2)
Heating surface:
Tubes		 638.7 sq ft (59.34 m2)
Heating surface:
Flues		 292 sq ft (27.1 m2)
Heating surface:
Firebox		 139 sq ft (12.9 m2)
Heating surface:
Total		 1,318.7 sq ft (122.51 m2)
Superheater area 204 sq ft (19.0 m2)
Cylinders two inside
Cylinder size 19 × 26 in (480 × 660 mm)
Valve gear Stephenson
Tractive effort 17,025 lbf (75.73 kN)
later reduced to 15,567 lbf (69.25 kN)
Career North Eastern Railway, London and North Eastern Railway, British Railways
Power class BR: 2P
Retired 1943-1957
Disposition None preserved

The NER Class R (later, LNER Class D20) was a class of 4-4-0 steam locomotive, designed by Wilson Worsdell for the North Eastern Railway. They passed to the London and North Eastern Railway (LNER) in 1923. In 1936, some were rebuilt with long-travel piston valves and classified D20/2. The unrebuilt locomotives were re-classified D20/1.

Contents

Numbering

Forty-six D20/1 and three D20/2 locomotives passed to British Railways in 1948 and they were numbered 62340-62397 (with gaps).

Preservation

The last D20 was withdrawn in 1957 and none were preserved.

Sources

  • Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 19

External links

v · d · eLondon and North Eastern Railway locomotives
Pre-grouping railway designs:
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
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
D38 • D39 • D40 • D41 • D42 • D43 • D44 • D45 • D46 • D47 • D48 • G10 • J90 • J91 • Z4 • Z5
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
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
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
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:
D52 • D53 • D54 • H2 • J64 • J94 • L2 • M2 • O6 • O7 • Y1 • Y3 • Y10 • Y11 • J45/DES1 • DES2


Stub icon This steam locomotive-related article is a stub. You can help Wikipedia by expanding it.