LSWR G14 class
LSWR/SR G14 class
|
Specifications |
Configuration:
|
|
• Whyte
|
4-6-0 |
• UIC
|
2'Cn |
Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
Leading dia. |
3 ft 7 in (1.092 m) |
Driver dia. |
6 ft 0 in (1.829 m) |
Loco weight |
70.95 long tons (72.1 t) |
Tender weight |
49.00 long tons (49.8 t) |
Fuel type |
Coal |
Fuel capacity |
4 long tons (4.1 t) |
Water cap |
4,500 imp gal (20,000 l) |
Firebox:
• Firegrate area |
31.5 sq ft (2.93 m2) |
Boiler pressure |
200 psi (1.38 MPa) |
Cylinders |
Four |
Cylinder size |
15×26 in (381×660 mm) |
|
|
|
Specifications |
Configuration:
|
|
• Whyte
|
4-6-0 |
• UIC
|
2'Cn |
Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
Leading dia. |
3 ft 7 in (1.092 m) |
Driver dia. |
6 ft 0 in (1.829 m) |
Loco weight |
70.95 long tons (72.1 t) |
Tender weight |
49.00 long tons (49.8 t) |
Fuel type |
Coal |
Fuel capacity |
4 long tons (4.1 t) |
Water cap |
4,500 imp gal (20,000 l) |
Firebox:
• Firegrate area |
31.5 sq ft (2.93 m2) |
Boiler pressure |
200 psi (1.38 MPa) |
Cylinders |
Four |
Cylinder size |
15×26 in (381×660 mm) |
The LSWR G14 class was a class of 4-6-0 locomotive designed by Dugald Drummond for the London and South Western Railway.
The continuing need to grasp the nettle in terms of Drummond's first two 4-6-0 classes meant that he went back to the drawing board to create yet another design. The LSWR's immediate traffic needs could not be covered by the relatively unsuccessful E14 class design of 1907 and the first Drummond 4-6-0, the F13 class of 1905 had been withdrawn from the heavy passenger services they were designed to undertake, as they would not 'run' and were heavy on coal, water and man-hours in terms of upkeep. However, the problem of continually accelerating timetables to the South Coast ports remained, and any further engines of the E14 class could not be relied upon to uphold the heavy passenger services alone.
It was once again clear that another 4-6-0 design was needed due to bolster the strength of heavy express passenger locomotives available to the LSWR's operating department. Their proven ability to ply their trade at faster speeds, and their inherently better power-to-weight ratio on other lines meant that Drummond decided to persevere with the concept. He also retained the four-cylinder layout. The resultant design was to become the G14 Class.
Drummond decided to continue his development of the 4-6-0 wheel arrangement in anticipation of further increases in speed and length of trains, a concept that had many advantages that would be incorporated onto his third design of this type. A 175 lbf/in² saturated boiler, somewhat smaller than on the F13/E14 classes was utilised to power the four-cylinder front end.
The new design was equipped with inside and outside sets of Walschaerts valve gear, therefore reducing the mechanical complexity that had plagued his previous designs, and these powered 6' wheels. This factor also meant a slightly lighter axle-loading, compared to the mixed Stephenson/Walschaerts F13 class. Large, single splashers were also implemented which covered the wheels, though these would prove troublesome in service. The Drummond 'watercart' eight-wheeled tender was utilised for the long journeys on the LSWR mainline. Full-scale construction was undertaken at Nine Elms, with the first of five G14s being outshopped in 1908.
After a period of 17 years in both primary and secondary passenger duties, Richard Maunsell, who became Chief Mechanical Engineer of the newly formed Southern Railway in 1923, decided that as the class did not to conform with the general standardization of Southern locomotive classes it should be withdrawn. The G14s were reduced to kits of parts, some of which may have been utilised in creating a further batch of N15 (King Arthur Class) locomotives.
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Wikipedia