Great North of Scotland 0-4-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class 29 (Locobase 10812)

Data from "Steam Motor Coach+Great North of Scotland Railway", Railway Master Mechanic, Vol XXX, # 3 (March 1906), pp. 88-90. See also [] . Works numbers were 1056-1057.

Pulling a 46-passenger coach built by Messrs. Cochran & Co in Arman, this detachable power unit had a vertical boiler to reduce the overall length. The unit had an acceleration to 30 miles per hour in 20 seconds and had a potential top speed of 60 mph. But the relatively powerful power unit was not provided to gain speed, the RRM reported, "...but for adding trailers, which are applied during the rush hours of the day."

These were designed by Pickersgill to operate on the Lossiemouth and St Combs branches. Unfortunately for the GNSR's aspirations, according to Steamindex, "...they were a failure in service ...They were little more successful on the Aberdeen suburban services and in the course of time the engine units were detached from the coaches and used as stationary boilers. Here they were apparently more successful; on the line they were dreadfully noisy and the boilers would not steam properly, and the hopes of their designer were not realized."

NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID10812
RailroadGreat North of Scotland
CountryGreat Britain
Number in Class2
Road Numbers29, 31
Number Built2
BuilderAndrew Barclay
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)10 / 3.05
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)43 / 13.11
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)105,280 / 47,754
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)720 / 2.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.80 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 1092
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)10" x 16" / 254x406
Tractive Effort (lbs / kg)5060 / 2295.18
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)295 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 3.94 / 1.20
Firebox Area (sq ft / m2)44 / 4.09
Grate Area (sq ft / m2)9 / 0.84
Evaporative Heating Surface (sq ft / m2)500 / 46.47
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)500 / 46.47
Evaporative Heating Surface/Cylinder Volume343.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1440
Same as above plus superheater percentage1440
Same as above but substitute firebox area for grate area7040
Power L15676
Power MT

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