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Mr. J. Ramsbottom

1858 — DX Goods
1863 — 4ft Shunter
1870 — Special Tank

Mr. F.W. Webb

1873 — 17in Coal Engine
1880 — 18in Goods
1881 — Special DX
1881 — Coal Tanks
1893 — ‘A’ class
1894 — Crane Tank
1896 — Dock Tank
1901 — ‘B’ class
1903 — 1400 Class

Mr. G. Whale

1904 — ‘C’ class
1904 — ‘E’ class
1906 — ‘D’ class
1906 — ‘F’ class
1906 — ‘G’ class
1912 — ‘G1’ class
1906 — 19in Express Goods

Mr. C.J. Bowen Cooke

1911 — 1185 class

Capt. H.P.M. Beames

1923 — 380 class


1919 — ‘MM’ class

Special DX

Vital Statistics

Official Name Six-Coupled Engine
Nickname Special DX
Water & Coal Storage Tender
Water Capacity 2,000 gallon
Coal Capacity ? tons
Wheel Arrangement 0-6-0
Driven Wheels Six 5ft 2in
Carrying Wheels none
Wheelbase 7ft 3in + 8ft 3in
Boiler 4ft 2in diameter; 10ft 6in long
Boiler Pressure ? psi
Grate Area ? sq.ft.
Tubes ?
Total Heating Area 1,099 sq.ft.
Cylinders Two inside 17in diameter; 24in stroke
Weight ? tons ? cwt
Designer Mr. F.W. Webb
Number in Class ?
Lifetime April 1881—

The design of locomotives generally evolved, but sometimes in an uncertain way and exceptions always existed. It was not always clear when a development became significant enough to mark a new design change: In April 1881 Mr. Webb Explain 'Webb, Francis William (1836—1906)' started rebuilding DX’s with a new boiler with the pressure increased to 150 psi Explain 'PSI (Pounds per Square Inch)' but it was only when they were also fitted with vacuum brakes Explain 'Vacuum Brake' for working passenger trains that they became known as ‘Special’ (or vacuum) DX’s. They normally had:-

  • Circular Webb smokebox Explain 'Smoke Box' doors
  • 1800 gallon tenders Explain 'Tender'
  • Closed splashers Explain 'Splasher' and safety valves Explain 'Safety Valve'
  • Wooden steam-powered brakes on the engine
  • A higher-pitched boiler
  • Chimney shortened from 4ft to 3ft 9in
  • conventional circular-bossed coupling rods Explain 'Coupling Rods'
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