3F  57550 – 57628  0-6-0  CR  McIntosh Class 812

812 class

 

Power Classification 3F
Introduced 1899 – 1900
Designer McIntosh
Company CR
Weight – Loco 45t 14cwt
Driving Wheels 5ft 0ins
Boiler Pressure 180psi
Cylinders Inside – 18½in x 26in
Tractive Effort 22,690lbf
Valve Gear Stephenson (slide valves)

 

 294 class Drummond 294 class introduced in 1883 -Jumbos
 812 class McIntosh 812 class introduced in 1899

 

This class was an enlarged version of the 57230 class Jumbos’ which as the Caledonian class 294 was the Caledonian standard goods class. Drummond based the 294 class on the 133 0-6-0s which he had built for the North British Railways during his term of office there from 1876 to 1883. Later when he went to the LSWR in 1897 he built thirty more almost identical engines which became the Southern Railway 700 class.

Two hundred and forty-four engines were built by Dugald Drummond, Lambie and McIntosh in the period 1883-1897, making them by far the most numerous Caledonian Railway class. Two hundred and thirty-eight of these came into BR stock, the first having been withdrawn in 1946. The last was not withdrawn until

The 812 class were built by McIntosh in 1899-1900. They were fitted with larger boilers and larger cylinders. They were designed as express goods engines but also performed at the head of excursion traffic and also to work the Clyde Coast boat trains. Of the original seventy-nine engines, seventy-six came into BR stock.

 

Number in Service.

31st Dec

 Built Withdrawals No. in Service
BR Numbers Quantity
1899-1900

57550-57628

        79

     79
Prior to 1948

      3
1947

      3

     76
1948

     71
1949

      2

     68
1950-55

     68
1956

      1

     67
1957

      2

     65
1958

      2

     63
1959

      5

     58
1960

      5

     53
1961

    16

     37
1962

    27

     10
1963

    10

       0
  • 57550-66 and 57617-28 were built at the Caledonian Railway works at St Rollox.
  • 57567-86 were built by Neilson, Reid & Co.
  • 57587-601 were built by Sharp Stewart.
  • 57602-16 were built by Dübs & Co.

 

They were fitted with Dunalastair 1 type boilers and Dunalastair 11 type cabs. LMS boilers were later fitted to most of them. They were originally classified as mixed traffic engines but only seventeen were built with Westinghouse brakes and five with vacuum brakes for working passenger trains.

A further seventeen engines were built in 1908-1909 with detail differences and these were the 652 class.

Preservation

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