From cdrrs.future.easyspace.com/503a.html, a reprint of a 1996 article in the Phoenix by EA Wade discusses these vertical watertube boiler curiosities which appeared in very small numbers in the late 1920s.
Four classes altogether of a total of approximately 25 locomotives appeared in that time, all looking like stubby tram cars with a entrance midway along the side and wheels the same diameter as the railcars they pulled.
The Lazarus is thought to be a B type. Three other Bs (works 117-119)were sold to Harold Arnold & Son in 1930 as 1-3.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | Lazarus |
Locobase ID | 5086 |
Railroad | R Briggs & Son, Ltd |
Country | Great Britain |
Whyte | 0-4-0T |
Number in Class | 1 |
Road Numbers | 104 |
Gauge | Std |
Number Built | 4 |
Builder | Atkinson-Walker |
Year | 1928 |
Valve Gear | |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 5.50 / 1.68 |
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) | 78,400 / 35,562 |
Engine Weight (lbs / kg) | 78,400 / 35,562 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 1200 / 4.55 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.30 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 65 / 32.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 36 / 914 |
Boiler Pressure (psi / kPa) | 280 / 1930 |
High Pressure Cylinders (dia x stroke) (in / mm) | 7" x 10" / 178x254 (3) |
Tractive Effort (lbs / kg) | 4859 / 2204.01 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 16.14 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | |
Grate Area (sq ft / m2) | 7 / 0.65 |
Evaporative Heating Surface (sq ft / m2) | 125 / 11.62 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 125 / 11.62 |
Evaporative Heating Surface/Cylinder Volume | 187.09 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1960 |
Same as above plus superheater percentage | 1960 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |