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LNER Class Y1
Specifications Configuration: •
Whyte
0-4-0 geared tank
Gauge 4 ft 8+ 1 ⁄2 in (1,435 mm )
Driver dia. 2 ft 6 in (0.76 m)
Wheelbase 7 ft 0 in (2.13 m) Loco weight Y1/1, 20.35 long tons (20.68 t) Y1/2, 19.8 long tons (20.1 t) Y1/3, 14 long tons (14 t) Y1/4, 19.35 long tons (19.66 t) Fuel type coal Fuel capacity 0.6–0.8 long tons (0.61–0.81 t) Water cap. 300 imp gal (1,400 L; 360 US gal) Firebox: • Grate area 3.97 sq ft (0.369 m2 ) (all but Y1/2) 5.1 sq ft (0.47 m2 ) (Y1/2) Boiler 2 ft 8+ 1 ⁄2 in (0.826 m) (all but Y1/2) 3 ft 1 in (0.94 m) (Y1/2)Boiler pressure 275 psi (1.90 MPa) water tube boiler Heating surface: • Firebox 26.7 sq ft (2.48 m2 ) (all but Y1/2) 35 sq ft (3.3 m2 ) (Y1/2) • Tubes 27.73 sq ft (2.576 m2 ) (all but Y1/2) 36.5 sq ft (3.39 m2 ) (Y1/2) • Total surface 64.15 sq ft (5.960 m2 ) (all but Y1/2) Superheater: • Heating area 9.72 sq ft (0.903 m2 ) (all but Y1/2)
Cylinders two
Cylinder size 6+ 3 ⁄4 in × 9 in (170 mm × 230 mm)
Performance figures
Tractive effort 68130-68142 and 68152-68153: 7,260 lbf (32,300 N) 68143-68151: 8,870 lbf (39,500 N)
The LNER Class Y1 was a class of
0-4-0
geared steam locomotives built by
Sentinel Waggon Works for the
London and North Eastern Railway and introduced in 1925. They passed into
British Railways ownership in 1948 and were numbered 68130-68153
[1] but 68134 was withdrawn almost immediately and may not have carried its BR number.
Power unit
The
superheated
vertical water-tube boiler and the
engine were similar to those used in Sentinel
steam wagons . There were variations within the class as regards boiler size and fuel capacity and these were denoted by sub-classes Y1/1 to Y1/4.
The engines had
poppet valves and reversing was by sliding
camshaft . The advantage of the water-tube boiler was that steam could be raised much more quickly than with a conventional
fire-tube boiler .
Transmission
Final drive to the wheels was by
sprocket chain . Some engines had a gear ratio of 11:25 and some 9:25. Tractive effort was:
Ratio 11:25, 7,260 lbf (68130-68142 and 68152-68153)
Ratio 9:25, 8,870 lbf (68143-68151)
Sub-classes
Y1/1, 68130-68135 and 68152 (total 7)
[2]
Y1/2, 68137, 68138, 68140-68151, 68153 (total 15)
[3]
Y1/3, 68139 (total 1)
[4]
Y1/4, 68136 (total 1)
[5]
There is disagreement between sources. According to LNER Encyclopedia
[6] there were six Y1/1s and sixteen Y1/2s.
Preservation
References
External links
Pre-grouping railway designs
LNER designs
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)
? 4-8-4 (Feb 1946)
? 4-8-2 (Feb 1946)
K 2-6-0 (Aug 1947)