London, Brighton & South Coast 4-6-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class N15X Remembrance (Locobase 3185)

Data from OS Nock (Southern Steam, 1968) in a table under which he adds the footnote that this class was converted from 4-6-4 tank engines; they retained the Belpaire firebox. See Locobase 2325 for the "Remembrance" class.

After the conversion, the class continued in service for two more decades, the last of them retiring in 1957.

Mike Watts, in An Interesting Transformation: The Rebuilt Baltic Tanks of the LBSCR, an April 2000 article originally published in The Coupling and reproduced on

[] (viewed 9 Feb 2005) notes the L-class Remembrance (333) and Stephenson (329) kept their names after conversion. The others were renamed after famous British locomotive designers: Beattie, Cudworth, Hackworth, Stroudley, and Trevithick (327)

In later years, at least some were fitted with low-profile, smoke-lifting "elephant ears" on either side of the firebox.

Watts offers this summary:"Although nominally of the same power as the King Arthurs, in reality, they were not a match for the heaviest of duties and remained on secondary duties. Although a good King Arthur could substitute for a Lord Nelson at any time, this was not so for an N15X."

Principal Dimensions by Steve Llanso of Sweat House Media

ClassN15X Remembrance
Locobase ID3185
RailroadLondon, Brighton & South Coast
CountryGreat Britain
Number in Class7
Road Numbers
Number Built
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)163,744 / 74,273
Tender Loaded Weight (lbs / kg)129,136 / 58,575
Total Engine and Tender Weight (lbs / kg)292,880 / 132,848
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)81 / 2057
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)21" x 28" / 533x711
Tractive Effort (lbs / kg)23,324 / 10579.60
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)152.10 / 14.14
Grate Area (sq ft / m2)26.68 / 2.48
Evaporative Heating Surface (sq ft / m2)1816 / 168.77
Superheating Surface (sq ft / m2)383 / 35.59
Combined Heating Surface (sq ft / m2)2199 / 204.36
Evaporative Heating Surface/Cylinder Volume161.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4802
Same as above plus superheater percentage5619
Same as above but substitute firebox area for grate area32,032
Power L113,040
Power MT

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