NER Class M1

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NER Class M1/M, Q and Q1
LNER Class D17/1, D17/2 and D18
North Eastern Railway Class M1 no. 1621 (6684770383).jpg
Preserved M1 No. 1621 in the National Railway Museum, York, September 2010
Type and origin
Power typeSteam
Designer Wilson Worsdell
Builder NER Gateshead
Build date1892-1894 (Class M1)
1896-1897 (Class Q)
1896 (Class Q1)
Total produced20 (Class M1)
30 (Class Q)
2 (Class Q1)
Specifications
Configuration:
   Whyte 4-4-0
   UIC 2'Bn2
Gauge 4 ft 8+12 in (1,435 mm)
Leading dia. 3 ft 7+14 in (1,099 mm)
Driver dia.7 ft 1+14 in (2,165 mm)
Wheelbase 23 ft 6 in (7.16 m) Class M1/Q engine
23 ft 9 in (7.24 m) Class Q1 engine
12 ft 8 in (3.86 m) tender
45 ft 8+14 in (13.926 m) Class M1/Q total
46 ft 2+34 in (14.091 m) Class Q1 total
LengthQ1 17.145 m (56.25 ft)
Axle load M1: 18.6 long tons (18.9 t)
Q: 18.8 long tons (19.1 t)
Q1: 19.2 long tons (19.5 t)
Loco weight52.5 long tons (53.3 t) (Class M1)
50.3 long tons (51.1 t) (Class Q)
53.5 long tons (54.4 t) (Class Q1)
Tender weight41.2 long tons (41.9 t)
Total weight93.7 long tons (95.2 t) (Class M1)
91.5 long tons (93.0 t) (Class Q)
94.7 long tons (96.2 t) (Class Q1)
Fuel typeCoal
Water cap.4,125 imp gal (18,750 L; 4,954 US gal)
Firebox:
  Firegrate area
19.8 sq ft (1.84 m2)
Boiler4 ft 4 in (1.32 m) diameter
Boiler pressure160 psi (1.10 MPa)
Heating surface1,097 sq ft (101.9 m2)
  Tubes479 sq ft (44.5 m2)
  Flues291 sq ft (27.0 m2)
  Firebox123 sq ft (11.4 m2)
Superheater:
  Heating area204 sq ft (19.0 m2)
Cylinders Two, inside
Cylinder size 19 in × 26 in (483 mm × 660 mm)
20 in × 26 in (508 mm × 660 mm) (No. 1870)
Valve gear Stephenson
Performance figures
Tractive effort 14,974 lbf (66.61 kN) (Class M1/Q)
13,990 lbf (62.23 kN) (No. 1869)
15,500 lbf (69 kN) (No. 1870)
Career
Operators North Eastern Railway, London & North Eastern Railway, British Rail
Withdrawn1931–1945 (Class M1)
1931–1948 (Class Q)
1930 (Class Q1)
DispositionOne M1 preserved (No. 1621); remainder M1, Q & Q1 scrapped

The North Eastern Railway Class M1 (LNER Class D17/1) is a class of 4-4-0 steam locomotive, designed by Wilson Worsdell. 20 initial engines were built, then 30 further units were built, designated Class Q (LNER Class D17/2).

Contents

Classification

Classification was complex. The NER initially classified these locomotives "M1", while a variant (with compound expansion) was classified "M". The compound was later re-classified "3CC" and the "M1" was re-classified "M".

Under LNER ownership the "M" (formerly "M1") became LNER Class D17/1 and the "3CC" (formerly "M") became LNER Class D19.

This table summarises LNER classes D17, D18 and D19, which were all very similar:

Original NER classNew NER classLNER ClassCylindersDriving wheels
M1MD17/1(2) 19″ × 26″7′ 1¼″
Q-D17/2(2) 19½″ × 26″7′ 1¼″
Q1-D18(2) 19½″ × 26″7′ 7¼″
M3CCD19HP (1) 19″ × 26″
LP (2) 20″ × 24″
7′ 1¼″

Accidents and incidents

Withdrawal

The last two D17/1s were withdrawn in 1945. Number 1629 was scrapped but number 1621 was saved for preservation.

No D17/1s passed into British Railways ownership. Two D17/2s did (BR numbers 62111 and 62112) but they were withdrawn in February 1948.

Preservation

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References

  1. Hoole, Ken (1983). Trains in Trouble: Vol. 4. Truro: Atlantic Books. p. 19. ISBN   0-906899-07-9.
  2. Gerard, Malcolm; Hamilton, J. A. B. (1981) [1967]. Trains to Nowhere. London: Georg Allen & Unwin. pp. 37–40. ISBN   0-04-385084-7.