Cowes & Newport 2-2-2 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Pioneer (Locobase 10164)

Data from William V Cauchi, "The Locomotive History of the Isle of Wight Central Railway," The Locomotive Magazine, Vol V (October 1900), p. 173.

Cauchi's summary includes both the development of the Isle of Wight railway network and their locomotives. The island, which is south of Hampshire on the south coast of England, measures 147 sq miles (380 sq km), which is not insiginficant in terms of requiring transport. The 4 1/2 -mile (7.2-km) C & N opened on 16 June 1862. In that short length, according to an account in the Isle of Wight Beacon ([]), "[i[t featured a tunnel near Mill Hill Station and part crossed the Medina Estuary on a wooden viaduct." followed by the Isle of Wight Company's Ryde-Ventnor in 1864-1866 and several other railways. The C & N, Newport & Ryde, and the Newport & Sandown were amalgamated in 1887 as the Isle of Wight Central Railways.

The compact little tanks, manufactured by S & G just before they reformulated as Avonside Engine works. In addition to Pioneer, there was Precursor and one other. The brass dome sat over the firebox and just ahead of the cab. When they entered service they were painted light blue lined with red; later they would acquire the I of WC red livery.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10164
RailroadCowes & Newport
CountryGreat Britain
Number in Class3
Road Numbers
Number Built3
BuilderSlaughter & Grunning
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)11.25 / 3.43
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)11.25 / 3.43
Axle Loading (Maximum Weight per Axle) (lbs / kg)19,040 / 8636
Weight on Drivers (lbs / kg)19,040 / 8636
Engine Weight (lbs / kg)43,120 / 19,559
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)43,120 / 19,559
Tender Water Capacity (gals / ML)480 / 1.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.30
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 16
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)13.5" x 16" / 343x406
Tractive Effort (lbs / kg)4957 / 2248.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.84
Heating Ability
Tubes (number - dia) (in / mm)119 - 1.875" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)53 / 4.93
Grate Area (sq ft / m2) 8.80 / 0.82
Evaporative Heating Surface (sq ft / m2)549 / 51.02
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)549 / 51.02
Evaporative Heating Surface/Cylinder Volume207.11
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1056
Same as above plus superheater percentage1056
Same as above but substitute firebox area for grate area6360
Power L13685
Power MT426.68

All material Copyright ©
Wes Barris