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 | |
|---|---|
| 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 | |