CGR 2nd Class 2-6-2TT

CGR 2nd Class 2-6-2TT
CGR 2nd Class 2-6-2TT no. M26, with tender and "front porch railings", Fish River Bridge, c. 1881
Type and origin Power type Steam Designer Robert Stephenson and Company Builder Robert Stephenson and Company Avonside Engine Company Kitson and Company Serial number RS 2205–2210, 2332–2339, 2353 (engines), RS 2215–2217, 2221–2223 (tenders) Avonside 1110–1113, 1157–1158, 1193–1194, 1209–1210 Kitson 2038–2041 Build date 1875–1879 Total produced 29 (2 lost at sea)
Specifications Configuration: ​  • Whyte 2-6-2TT (Prairie)  • UIC 1’C1’n2t Driver 2nd coupled axle Gauge 3 ft 6 in (1,067 mm) Cape gauge Leading dia. 24 in (610 mm) Coupled dia. 38 in (965 mm) Trailing dia. 24 in (610 mm) Wheelbase: ​  • Axle spacing (Asymmetrical) 1–2: 4 ft 8 in (1,422 mm) 2–3: 3 ft 4 in (1,016 mm)  • Engine 20 ft 3 in (6,172 mm)  • Coupled 8 ft (2,438 mm) Length: ​  • Over couplers 27 ft (8,230 mm) Height 12 ft (3,658 mm) Frame type Plate Axle load 9 LT 6 cwt 3 qtr (9,487 kg) ​  • Leading 2 LT 9 cwt (2,489 kg)  • 1st coupled 7 LT 13 cwt (7,773 kg)  • 2nd coupled 9 LT 6 cwt 3 qtr (9,487 kg)  • 3rd coupled 6 LT 17 cwt 1 qtr (6,973 kg)  • Trailing 2 LT 9 cwt (2,489 kg) Adhesive weight 23 LT 17 cwt (24,230 kg) Loco weight 28 LT 14 cwt 4 qtr (29,210 kg) Tender type 2-axle Fuel type Coal Fuel capacity Engine: 0 LT 15 cwt (0.8 t) Tender: 2 LT (2.0 t) Water cap. Engine: 650 imp gal (2,950 L) Tender: 900 imp gal (4,090 L) Firebox: ​  • Type Round-top  • Grate area 11 sq ft (1.0 m2) Boiler: ​  • Pitch 5 ft 10+1⁄2 in (1,791 mm)  • Tube plates 10 ft (3,048 mm) Boiler pressure 130 psi (896 kPa) Safety valve Salter Heating surface: ​  • Firebox 58 sq ft (5.4 m2)  • Tubes 692 sq ft (64.3 m2)  • Total surface 750 sq ft (70 m2) Cylinders Two Cylinder size 15 in (381 mm) bore 20 in (508 mm) stroke Valve gear Stephenson Train brakes Clarke's chain brakes Couplers Johnston link-and-pin
Performance figures Tractive effort 11,546 lbf (51.36 kN) @ 75%
Career Operators Cape Government Railways Class 2nd Class Number in class 27 Numbers E17-E26, M5-M10, M25-M33, W1-W2 Delivered 1875–1879 First run 1875

The Cape Government Railways 2nd Class 2-6-2TT of 1875 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

The first mixed traffic locomotives to enter service on the new 3 feet 6 inches Cape gauge mainlines of the Cape Government Railways were 2-6-2 Prairie type side-tank engines which were delivered between 1875 and 1879. Four-wheeled tenders were also acquired and the locomotives could be operated in either a tank or tank-and-tender engine configuration, as circumstances demanded. These locomotives were later designated the Cape 2nd Class.^[1][2]