LMS Turbomotive

LMS Turbomotive
Type and origin
Power type Steam Turbine-mechanical
Designer William Stanier
Builder LMS Crewe Works
Build date 1935
Specifications
Configuration 4-6-2
UIC class 2′C1′ turb.h
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Leading dia. 3 ft 0 in (0.914 m)
Driver dia. 6 ft 6 in (1.981 m)
Trailing dia. 3 ft 9 in (1.143 m)
Length 74 ft 4 1⁄4 in (22.66 m) (orig.)
74 ft 0 1⁄4 in (22.56 m) (rebuilt)
Loco weight 110.55 long tons (123.82 short tons; 112.32 t) (orig.)
105.20 long tons (117.82 short tons; 106.89 t) (rebuilt)
Fuel type Coal
Fuel capacity 9 long tons (10 short tons; 9.1 t)
Water cap 4,000 imp gal (18,000 l; 4,800 US gal)
Firebox:
 • Firegrate area		 45 sq ft (4.2 m2)
Boiler LMS type 1
Boiler pressure 250 lbf/in2 (1.7 MPa)
Heating surface:
 • Firebox		 217 sq ft (20.2 m2)
Career
Operators
Power class
  • LMS: 7P
  • BR: 8P
Numbers
  • LMS: 6202
  • BR: 46202
Disposition Rebuilt as conventional reciprocating-steam locomotive in 1952, wrecked same year, scrapped.

The Turbomotive was a modified Princess Royal Class steam locomotive designed by William Stanier and built by the London, Midland and Scottish Railway in 1935.[1] It used turbines instead of cylinders. It was later rebuilt as a conventional locomotive 46202 Princess Anne.

The forward turbine had 18 rows of blading. Output was 2,400 hp (1,800 kW) at 7060 rpm, corresponding to running at 62 mph (100 km/h). Boiler pressure was 250 psi (1.7 MPa). The turbine was designed to operate into a maximum back-pressure of 2 psi (14 kPa), allowing a conventional double blast-pipe to provide the boiler draught, and eliminating draught fans, which always seemed to give a disproportionate amount of trouble.

The reverse turbine had 4 rows of blades. It was engaged by a dog clutch, activated when the reverser lever was set to "0". This was originally steam-operated by a small piston and cylinder.

46202 Princess Anne

46202 was rebuilt as a conventional locomotive in 1952, using new mainframes and a spare set of cylinders from a "Coronation" class locomotive, and named Princess Anne.[2] On 8 October 1952, after only two months in service, it was the train engine of the double-headed Liverpool and Manchester express involved in the Harrow and Wealdstone railway accident. The locomotive was taken to Crewe, where it was deemed beyond economical repair and scrapped. The destruction of No. 46202 led to the construction of BR Standard Class 8 number 71000, Duke of Gloucester.

See also

References

  1. ↑ "News in a Nutshell". British Pathe. 11 July 1935. Retrieved 2009-12-17.
  2. ↑ Goodman 1994, p. 86.

Literature

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