Garnkirk & Glasgow 2-2-0 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class St Rollox (Locobase 5650)

Data from [] (21 July 2003). Jim Howie. This was one of two Planets delivered to this Scottish Railway in 1831 and was Stephenson's 36th locomotive. Price delivered was 780 pounds. Compared to other Planet designs, this was a smaller engine. The very similar Jenny, built by Johnston & McNab in 1836, had 85 tubes with a total heating surface of 294 sq ft.

It served the G & G for five years, was sold to the Paisley & Renfrew for 350 pounds. Howie notes that when the P&R's rolling stock was auctioned off, St Rollox had a scrap value of only 13 pounds.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassSt Rollox
Locobase ID5650
RailroadGarnkirk & Glasgow
CountryGreat Britain
Whyte2-2-0
Number in Class1
Road Numbers
GaugeStd
Number Built1
BuilderRobert Stephenson & Co
Year1831
Valve Gear
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)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
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)54 / 1372
Boiler Pressure (psi / kPa)50 / 3.40
High Pressure Cylinders (dia x stroke) (in / mm)10" x 14" / 254x356
Tractive Effort (lbs / kg)1102 / 499.86
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)86 - 1" / 25
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)6 / 1.83
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)299 / 27.79
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)299 / 27.79
Evaporative Heating Surface/Cylinder Volume234.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area
Power L1
Power MT

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