LMS Stanier 2-6-2T

LMS Stanier Class 3P 2-6-2T

Withdrawn 40208 stored at Trafford Park locomotive depot, April 1962
Type and origin
Power type Steam
Designer William Stanier
Builder
Build date 1935–1938
Total produced 139
Specifications
Configuration 2-6-2T
UIC classification 1′C1′ h2t
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Leading wheel
diameter		 3 ft 3 1⁄2 in (1.003 m)
Driver diameter 5 ft 3 in (1.600 m)
Trailing wheel
diameter		 3 ft 3 1⁄2 in (1.003 m)
Wheelbase 33 ft 3 in (10.13 m)
Length 41 ft 11 3⁄4 in (12.80 m)
Locomotive weight
  • w/ 6 boiler: 70.75 long tons (71.89 t)
  • w/ 6A boiler: 71.25 long tons (72.39 t)
  • w/ 6B boiler: 72.5 long tons (73.7 t)
Fuel type Coal
Fuel capacity 3 long tons (3.0 t)
Water capacity 1,500 imp gal (6,800 l; 1,800 US gal)
Boiler
  • LMS type 6 (71–144)
  • LMS type 6A (145–209)
  • LMS type 6B (6 off)
Boiler pressure 200 lbf/in2 (1.38 MPa)
Firegrate area
  • 71–120: 17 1⁄2 sq ft (1.63 m2)
  • Remainder: 19 1⁄4 sq ft (1.79 m2)
Heating surface:
– Tubes and flues
  • 71–120: 775 sq ft (72.0 m2)
  • 121–144: 859 sq ft (79.8 m2)
  • 6A boiler: 939 sq ft (87.2 m2)
  • 6B boiler: 997 sq ft (92.6 m2)
– Firebox
  • 71–120: 104 sq ft (9.7 m2)
  • 121–144: 107 sq ft (9.9 m2)
  • 6A boiler: 107 sq ft (9.9 m2)
  • 6B boiler: 111 sq ft (10.3 m2)
Superheater area
  • 6 boiler: 73 sq ft (6.8 m2) to 76 sq ft (7.1 m2)
  • 6A boiler: 74 sq ft (6.9 m2) to 80 sq ft (7.4 m2)
  • 6B boiler: 138 sq ft (12.8 m2) to 137 sq ft (12.7 m2)
Cylinders Two, outside
Cylinder size 17 1⁄2 in × 26 in (444 mm × 660 mm)
Valve gear Walschaerts
Valve type Piston valves
Performance figures
Tractive effort 21,485 lbf (95.57 kN)
Career
Operator(s)
Power class
  • LMS: 3P
  • BR: 3MT
Number(s)
  • LMS: 71–209
  • BR: 40071–40209
Withdrawn 1959–1962
Disposition All scrapped

The Stanier Class 3P 2-6-2T was a class of London, Midland and Scottish Railway (LMS) steam locomotive. They were designed by William Stanier based on the earlier LMS Fowler 2-6-2T.

Overview

A taper-boiler versions of Henry Fowler's 1930 design, the general dimensions were the same with some improvements. They were under-boilered and although improved they were always considered to be indifferent performers. In some ways they were inferior to their predecessors. The cab was of Stanier’s usual excellent design with the coal bunker built higher than the rear cab windows but angled inwards to avoid them, thus giving good visibility when running bunker first.

The first 2 lots (117 and 126, locomotives 71–144) were built with number 6 domeless boilers but the rest were built with improved 6A boilers with separate top-feed and steam dome. Both types of boilers were later modified to carry Adams ‘Vortex’ blastpipe to improve steaming. These locomotives could always be identified by the larger diameter chimney.

The 139 locomotives were numbered 71–209 by the LMS, and after 1948 BR renumbered them 40071–209. The LMS classified them 3P.

In a final attempt to improve the locomotives 6 were rebuilt with larger 6B boilers; these were 169 in 1940, 163 in 1941, 148 and 203 in 1942, and 40142 and 40167 in 1956. The re-boilering was not considered to be cost effective.

They were to be found on various duties – stopping train, suburban passenger routes, branch line, empty stock and banking.

They are generally considered to be the least successful of Stanier’s standard designs

Detail

Numbers Lot numbers Date built Built at
LMS BR
71–90 40071–90 117 1935 Derby
91–144 40091–144 126 1935 Derby
145–72 40145–72 139 1937 Derby
173–84 40173–84 139 1938 Derby
185–95 40185–95 140 1937 Crewe
195–209 40195–209 140 1938 Crewe

Withdrawals

None were preserved.

References

    External links

    Wikimedia Commons has media related to LMS Stanier Class 3 2-6-2T.