South African type XP1 tender

South African type XP1 tender

Type XP1 tender on SAR Class 4AR no. 1560, c. 1961

Type and origin Locomotive SAR Classes MC1, 4AR & 10 Designer South African Railways (D.A. Hendrie) Builder North British Locomotive Company In service c. 1940

Specifications Configuration 2-axle bogies Gauge 3 ft 6 in (1,067 mm) Cape gauge Length 25 ft 10 3⁄4 in (7,893 mm) Wheel dia. 34 in (864 mm) Wheelbase 16 ft 9 in (5,105 mm)  • Bogie 4 ft 7 in (1,397 mm) Axle load 13 LT 15 cwt (13,970 kg)  • Front bogie 27 LT 10 cwt (27,940 kg)  • Rear bogie 23 LT 11 cwt (23,930 kg) Weight empty 49,452 lb (22,431 kg) Weight w/o 51 LT 1 cwt (51,870 kg) Fuel type Coal Fuel cap. 10 LT (10.2 t) Water cap. 4,250 imp gal (19,300 l) Stoking Manual Couplers Drawbar & AAR knuckle

Career Operators South African Railways Numbers SAR 1634

The South African type XP1 tender was a steam locomotive tender.

The Type XP1 tender first entered service in 1913 as a Type MP1, as tender to a Class MC1 Mallet locomotive. One of the Type MP1 tenders was later modified to suit a Class 10 locomotive and reclassified to Type XP1. It was subsequently attached to a Class 4AR locomotive.

The Type XP1 tender was built as a Type MP1 tender by North British Locomotive Company in 1913.

Type MP1 tenders originally entered South African Railways (SAR) service in 1912, as tenders to Class 12 Mountain type locomotives. The locomotive and tender were designed by D.A. Hendrie, Chief Mechanical Engineer of the SAR. Tenders were numbered for their original engines and an oval number plate, bearing the engine number and often also the tender type, was attached to the rear end of the tender. The particular tender which was to be modified to Type XP1, entered service in 1913 as tender to Class MC1 Mallet no. 1634.

At some stage, probably after the Class MC1 were withdrawn from service in 1939, the intermediate draw and buffing gear of Type MP1 tender no. 1634 was altered to suit Class 10 4-6-2 Pacific no. 746. This modification converted no. 1634 to the sole Type XP1 tender. During the early 1960s, the tender was attached to Class 4AR Mountain no. 1560. This locomotive and the tender were both withdrawn from service by 1974.

The Type XP1 tender had a water capacity of 4,250 imperial gallons (19,300 litres), a coal capacity of 10 long tons (10.2 tonnes) and a maximum axle load of 13 long tons 15 hundredweight (13,970 kilograms). Type XP1 tender no. 1634 is known to have served as tender to three locomotives of different classes.

Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the SAR. The first letter of the tender type indicates the classes of engines to which it could be coupled. The "X_" tenders could be used with the locomotive classes as shown.