LNWR Teutonic Class

The LNWR Teutonic class was a class of 10 passenger three-cylinder compound 2-2-2-0 locomotives designed by F. W. Webb for the London and North Western Railway, and manufactured by them in their Crewe Works between 1889 and 1890.

LNWR Teutonic class
No. 1301 Teutonic Crewe Works portrait
Type and origin
Power typeSteam
DesignerF. W. Webb
BuilderCrewe Works
Serial number3102–3111
Build dateMarch 1889 – June 1890
Total produced10
Specifications
Configuration:
​
 • Whyte2-2-2-0
 • UIC1AA n3v
Gauge4 ft 8+1⁄2 in (1,435 mm)
Leading dia.3 ft 10+1⁄2 in (1.181 m) + tyres
Driver dia.6 ft 10 in (2.083 m) + tyres
Wheelbase:
 • Engine		18 ft 1 in (5.51 m)
 • Leading8 ft 5 in (2.57 m)
 • Drivers9 ft 8 in (2.95 m)
Loco weight46 long tons (47 t)
Boiler:
​
 • Diameter4 ft 2 in (1.27 m)
 • Tube plates11 ft 0 in (3.35 m)
Boiler pressure175 lbf/in2 (1.21 MPa)
Heating surface1,401.5 sq ft (130.20 m2)
CylindersThree: two HP (outside), one LP (inside)
High-pressure cylinder14 in × 24 in (356 mm × 610 mm)
Low-pressure cylinder30 in × 24 in (762 mm × 610 mm)
Valve gear
Career
OperatorsLondon and North Western Railway
ScrappedOctober 1905 – July 1907
DispositionAll scrapped

Design
No. 1301 Teutonic in black livery

The design featured a boiler pressed to 175 lbf/in2 (1.21 MPa) delivering saturated steam to two outside 14-inch (356 mm) high-pressure cylinders, which exhausted to one 30-inch (762 mm) low-pressure cylinder inside the frames. All three cylinders had a stroke of 24 inches (610 mm); the high-pressure cylinders drove the rear wheels, while the low-pressure drove the leading driving wheels. As the two pairs of driving wheels were not connected, the locomotives were "duplex drive" or "double-singles".

They were a development of Webb's Dreadnought class; they had larger driving and leading wheels, and the additions of cylinder tail rods (which were later removed). There were also further modifications to the Joy valve gear, but the seven locomotives built in 1890 had the inside cylinder worked by slip-eccentric valve gear instead from new.[1]

Of the ten locomotives, nine were named after ships of the White Star Line, the exception was named after a character in a Walter Scott novel, as it was exhibited at the Edinburgh International Exhibition of 1890.

Decline

When George Whale become chief mechanical engineer of the LNWR in 1903, he started a programme of eliminating Webb's over-complicated duplex compound locomotives. Consequently, the class was scrapped between October 1905, and July 1907, having been replaced by Whale's Experiment class.[1]

References
  1. Baxter 1979, p. 196.
  • Baxter, Bertram (1979). Baxter, David (ed.). British Locomotive Catalogue 1825–1923, Volume 2B: London and North Western Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. ISBN 0-903485-84-2.
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