User:Venudxb/sandbox/Indian locomotive class AP

Indian locomotive class AP
Factory picture of East Indian Railway (EIR) No. 1300 with 3000 gal tender
Type and origin Build date 1907
Specifications Configuration: ​  • UIC 2’B1’ n2 Gauge 1676 Coupled dia. 6 ft 6 in (1980 mm) Carrying wheel diameter 3 ft 7 in (1092 mm) Wheelbase: ​  • Bogie 7 ft (2134 mm)  • incl. tender Variante mit 3000 Gallonen-Tender: 50 ft 7+1⁄2 in (15.430 mm) Length: ​  • Over beams Variante mit 3000 Gallonen-Tender: 60 ft 6+7⁄8 in (18.460 mm) Width 9 ft 6 in (2896 mm) Height 13 ft 6 in (4115 mm) Axle load 17,5 t Adhesive weight 35 t Service weight 66 t Tender weight 3000 Gallonen: 40,1 t 3500 Gallonen: 46,2 t 4000 Gallonen: 59,4 t Total weight mit 3000 Gallonen-Tender: 106 t mit 4000 Gallonen-Tender: 112 t mit 4500 Gallonen-Tender: 125,5 t Tender type 3000 und 4000 Gallonen: dreiachsig 4500 Gallonen: zwei Drehgestelle Fuel capacity 3000 und 4000 Gallonen: 7,6 t Kohle 4000 Gallonen: 10,2 t Kohle Water cap. 3000 Gallonen: 13,6 m³ 3500 Gallonen: 18,2 m³ 4000 Gallonen: 20,5 m³ Boiler: ​  • Tube plates 15 ft 6 in (4725 mm) No. of heating tubes 201 Heating tube length 19 ft 10+1⁄2 in (6058 mm) Boiler pressure 180 psi (12,4 bar) Heating surface: ​  • Firebox 32 sq ft (2,97 m²)  • Radiative 157 sq ft (14,6 m²)  • Tubes 1880 sq ft (174,7 m²)  • Evaporative 2037 sq ft (189 m²) Cylinders 2 Cylinder size 19 in (483 mm) Piston stroke 26 in (660 mm) Train control Heusinger mit Richardson-Flachschieber
Performance figures Tractive effort: ​  • Starting 11,2 bar Kesseldruck: 91 kN 9,3 bar Kesseldruck: 76 kN

The AP series was a wide-gauge tender steam locomotive for passenger train service on the railways in British India , which was built around 1907. She is one of the BESA locomotives developed by the British Engineering Standards Committee , later called the British Engineering Standards Association (BESA). The abbreviation AP stands for Atlantic Passenger Locomotive, where Atlantic refers to the axle arrangement of the same name.

History

The AP series was the locomotive intended for express trains, which was first introduced in the second edition of the BESA standard from 1907. She could be equipped with three different large tenders - the small one held 3,000, the medium 4,000 and the large 4,500 gallons of water.

Vulcan delivered a series of 28 to the East Indian Railway (EIR), whose route network expanded from Calcutta towards the West. The elegant locomotives, built according to British designs, were used in front of express trains. On the railway they were numbered 1300 to 1327, the factory numbers were 2330–2357/1908.

Further locomotives were delivered in 1908 by the North British Locomotive Company.

• 
  Variant with 3000 gallon tender
• 
  Variant with 4000 gallon tender
• 
  Variant with 4500 gallon tender
• 
  EIR locomotive No. 120, built by North British Locomotive Company

Technical

The locomotive was a two-cylinder wet steam engine with a Belpaire boiler . The grate was arranged between the coupling gear sets . The two steam cylinders were located on the outside of the frame cheeks of the inner frame , and the Heusinger control was arranged between the wheels. The circulating plate was set low so that wheel protection boxes were arranged above the two coupling wheel sets . A small cow catcher was attached to the front buffer beam . The BESA standard suggested a completely enclosed cab , with the rear wall of the cab being formed by the tender. However, the locomotives built for the East Indian Railway had tenders without a rear wall of the cab. The tenders for 3000 and 4000 gallons of water were three-axle, the 4500 gallon tender was four-axle with two bogies . The two three-axle variants had running boards and handrails along the side walls, which made it possible to reach the train from the locomotive while it was moving. Another peculiarity of the design was the riser arranged in the middle of the dome axes. The series had the largest wheels of any steam locomotive used in India. They were almost two meters in diameter.

Similar series

EM 922 in New Delhi

Locomotive No. 992 of the EM series on display at the National Rail Museum of India in New Delhi has very similar main dimensions to the AP series locomotives. However, it was created by converting a 2'B locomotive from the E1 series of the Great Indian Peninsula Railway (GIPR), to which a trailing axle with an external frame was added. With a diameter of 6 ft 6 in, the driving wheels have the same dimensions as those of the AP series. The drive wheels, which are also very close together, are characteristic.

Weblinks

• Factory photo of a machine built by the North British Locomotive Company