NER Class M1

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).

NER Class M1/M, Q and Q1
LNER Class D17/1, D17/2 and D18
Preserved M1 No. 1621 in the National Railway Museum, York, September 2010
Type and origin
Power typeSteam
DesignerWilson Worsdell
BuilderNER 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:
​
 • Whyte4-4-0
 • UIC2'Bn2
Gauge4 ft 8 1⁄2 in (1,435 mm)
Leading dia.3 ft 7 1⁄4 in (1,099 mm)
Driver dia.7 ft 1 1⁄4 in (2,165 mm)
Wheelbase23 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 1⁄4 in (13.926 m) Class M1/Q total
46 ft 2 3⁄4 in (14.091 m) Class Q1 total
LengthQ1 17.145 m (56.25 ft)
Axle loadM1: 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 cap4,125 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)
CylindersTwo, inside
Cylinder size19 in × 26 in (483 mm × 660 mm)
20 in × 26 in (508 mm × 660 mm) (No. 1870)
Valve gearStephenson
Performance figures
Tractive effort14,974 lbf (66.61 kN) (Class M1/Q)
13,990 lbf (62.23 kN) (No. 1869)
15,500 lbf (69 kN) (No. 1870)
Career
OperatorsNorth 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

Classification

Classification is 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 class New NER class LNER Class Cylinders Driving wheels
M1 M D17/1 (2) 19″ × 26″ 7′ 1¼″
Q - D17/2 (2) 19½″ × 26″ 7′ 1¼″
Q1 - D18 (2) 19½″ × 26″ 7′ 7¼″
M 3CC D19 HP (1) 19″ × 26″
LP (2) 20″ × 24″		 7′ 1¼″
  • HP = high-pressure cylinder, LP = low-pressure cylinders

Accidents and incidents
  • On 4 October 1894, locomotive No. 1622 was one of two locomotives hauling a sleeping car train which overran signals and collided with a freight train that was being shunted at Castle Hills, Yorkshire. One person was killed.[1]
Main article: Hull Paragon rail accident
  • On 14 February 1927, locomotive No. 1628 was hauling a passenger train that was in a head-on collision with another at Hull Paragon station, Yorkshire due to a signalman's error. Twelve people were killed and 24 were injured.[2]

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
  • D17/1 number 1621 is preserved at the National Railway Museum. It is now currently at the National Railway Museum in Shildon.
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gollark: They just state them as fact. And as I said, I don't believe torture is actually effective at anything but making terrible people happy.
gollark: But the question just states it as fact and has "yes, torture fat person" and "no, no torturing fat person, you are awful and want the entire city to be explodinated".
gollark: I suppose you could argue that I don't believe it as a "matter of principle" thing, but from what I've heard torture is *not* actually a very effective way to get information.
gollark: For example, there's - on the "fat man" trolley problem question - a question about "do you believe torture is always wrong as a matter of principle" and then "bla bla bla nuclear device torture fat man or not".

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.
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