Midland 4-6-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Deeley's Concept (Locobase 5737)

See [] (visited 7 November 2003) for details on this proposed TenWheeler compound by Richard Deeley.

In 1907, Sandham Symes drew up this four-cylinder compound that envisioned using 8" (203 mm) piston valves on all cylinders. According to the website's author "...a less-than-holy alliance between the Midland's general superintendent, Paget, and Deely's chief draughtsman, Anderson, resulted in the 4-6-0 being indefinitely postponed in favour of the unorthodox and unsuccessful locomotive known as the 'Paget Locomotive'."

The author adds that Deeley's resignation two years later probably stemmed from this choice. It's interesting to note that no other British Ten-wheeler was built as a compound, so speculation that this was a great loss to the Midland and the LSMR might be overdrawn.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassDeeley's Concept
Locobase ID5737
CountryGreat Britain
Number in Class
Road Numbers
Number Built
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)15.50 / 4.72
Engine Wheelbase (ft / m)30.67 / 9.35
Ratio of driving wheelbase to overall engine wheelbase 0.51
Overall Wheelbase (engine & tender) (ft / m)54.67 / 16.66
Axle Loading (Maximum Weight per Axle) (lbs / kg)41,440 / 18,797
Weight on Drivers (lbs / kg)124,320 / 56,391
Engine Weight (lbs / kg)170,240 / 77,220
Tender Loaded Weight (lbs / kg)96,152 / 43,614
Total Engine and Tender Weight (lbs / kg)266,392 / 120,834
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)69 / 34.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)78 / 1981
Boiler Pressure (psi / kPa)220 / 15.20
High Pressure Cylinders (dia x stroke) (in / mm)13" x 26" / 330x660
Low Pressure Cylinders (dia x stroke) (in / mm)21" x 26" / 533x660
Tractive Effort (lbs / kg)15,232 / 6909.13
Factor of Adhesion (Weight on Drivers/Tractive Effort) 8.16
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)165.50 / 15.38
Grate Area (sq ft / m2)30.10 / 2.80
Evaporative Heating Surface (sq ft / m2)1970 / 183.09
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1970 / 183.09
Evaporative Heating Surface/Cylinder Volume493.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6622
Same as above plus superheater percentage6622
Same as above but substitute firebox area for grate area36,410
Power L17676
Power MT408.37

All material Copyright © SteamLocomotive.com
Wes Barris