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GNR Class J9 LNER Class J7
Type and origin
Power type
Steam
Designer
Patrick Stirling
Builder
Doncaster Works
Serial number
692–791
Build date
1896
Total produced
10 (original production)
Rebuild date
1924-1926
Number rebuilt
5
Specifications
Configuration:
• Whyte
0-6-0
• UIC
C n2
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Driver dia.
4 ft 8 in (1.422 m)
Wheelbase
15 ft 6 in (4.7 m)
Axle load
15.5 long tons (15.7 t)
Loco weight
38.1 long tons (38.7 t)
Tender weight
34.9 long tons (35.5 t)
Total weight
73.0 long tons (74.2 t)
Fuel type
Coal
Firebox:
• Grate area
16.25 sq ft (1.51 m2)
Boiler
4 ft 5 in (1.3 m) (original) 4 ft 8 in (1.4 m) (LNER rebuilds)
Boiler pressure
170 psi (1.17 MPa)
Heating surface:
• Firebox
103 sq ft (9.6 m2)
• Tubes
1,016 sq ft (94.4 m2)
• Total surface
1,119 sq ft (104.0 m2)
Cylinders
Two, inside
Cylinder size
17+1⁄2 in × 26 in (444 mm × 660 mm)
Valve gear
Stephenson valve gear
Valve type
Slide
Performance figures
Tractive effort
20,548 lbf (91.4 kN)
Career
Operators
Great Northern Railway
→ London and North Eastern Railway
Numbers
GNR: 1021–1030
→ LNER: 4021–4030
Withdrawn
1927–1936
Disposition
All scrapped
The GNR Class J9 was a class of two-cylinder steam locomotives of the 0-6-0 wheel arrangement, built in 1896 for the Great Northern Railway.
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