LNWR Prince of Wales Tank Class

LNWR 2665 class
“5ft 6in Tank (Superheated)”
Type and origin
Power type Steam
Designer Charles Bowen Cooke
Builder LNWR Crewe Works
Serial number 4950–69, 5080–96, 5347–56
Model 1910–1916
Total produced 47
Specifications
Configuration 4-6-2T
UIC classification 2′C1 n2t
Gauge 4 ft 8 12 in (1,435 mm)
Leading wheel
diameter
3 ft 3 in (0.991 m)
Driver diameter 5 ft 8 12 in (1.740 m)
Trailing wheel
diameter
3 ft 3 in (0.991 m)
Locomotive weight 78 long tons (79 t)
Boiler pressure 175 lbf/in2 (1.21 MPa)
Heating surface:
– Total
Saturated: 1,475 sq ft (137.0 m2)
Superheated: 1,330 sq ft (124 m2)
Cylinders Two
Cylinder size Saturated: 18 12 in × 26 in (0 m × 1 m)
Superheated: 20 in × 26 in (508 mm × 660 mm)
Valve gear Joy
Valve type Piston valves
Career
Class 5ft 6in Tank (Superheated)
Power class LMS: 4P
Nicknames Prince of Wales Tank
Withdrawn 1945–1941
Disposition All scrapped

The London and North Western Railway (LNWR) Prince of Wales Tank Class was a pacific tank engine version of the Prince of Wales Class 4-6-0 steam locomotive.

Bowen-Cooke's predecessor George Whale had built 50 related Precursor Tank Class 4-4-2 engines. In terms of familial relationships, Prince of Wales Tank was both a superheated and extended version of the Precursor Tank, and a version of the Prince of Wales Class 4-6-0 steam locomotive with side tanks and a bunker which necessitated an extension to the frames and trailing pony truck. They were mostly used on suburban services out of Euston station.

The LNWR built 47 of the superheated tanks between 1910 and 1916 under Charles Bowen-Cooke.

All passed onto LMS ownership on the 1923 grouping. The LMS renumbered them 6950–6996 and gave them the power classification 4P. Withdrawals started in 1935, their replacements being Class 4 2-6-4T designs by Fowler and Stanier. All were gone by 1941.

None was preserved.

References