Caledonian Railway 439 Class

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The Caledonian Railway 439 Class is a class of 0-4-4T steam locomotive. It was a development of the earlier 19 Class and 92 Class 0-4-4Ts and predecessor of the 431 Class. The 439 Class was introduced by John F. McIntosh in 1900 and a modified version was introduced by William Pickersgill in 1915.

Contents 1 Introduction 2 Earlier versions 3 Later versions 4 Preservation 5 Dimensions 5.1 The 439 Class 5.2 The 19 and 92 Classes 5.3 The 431 and LMS Classes 6 See also 7 Sources 8 External links

[edit] Introduction

Ninety-two engines of the class were built between 1900 and 1925, a few under LMS auspices. Seventy-four Class 439s passed into British Railways ownership in 1948 and they were numbered 55159-55236 (with gaps).

[edit] Earlier versions

• 19 Class Introduced 1895
• 92 Class Introduced 1897, developed from 29 Class 0-6-0T

The 19 and 92 Classes were originally fitted with condensing apparatus for use on Glasgow Central Low Level lines. Twenty-four of them passed into British Railways ownership and they were numbered 55119-55146 (with gaps).

[edit] Later versions

In 1922 Pickersgill introduced the 431 Class with larger cylinders and cast-iron front buffer beam for banking. These were numbered 55237-55240 by British Railways.

In 1925 the LMS introduced their own version of the 439 Class and these were numbered 55260-55269 by British Railways.

[edit] Preservation

One, CR 419, (later LMS number 15189, BR 55189) has been preserved and is the flagship of the Scottish Railway Preservation Society.

[edit] Dimensions

[edit] The 439 Class

• LMS/BR Power classification, 2P
• Locomotive weight:
  • McIntosh locos, 53 tons 19 cwt
  • Pickersgill locos, 57 tons 12 cwt
• Boiler pressure, 180 psi
• Superheater, No
• Cylinders, 18"x26"
• Driving wheel diameter, 5' 9"
• Tractive effort, 18,680 lb
• Valve gear, Stephenson

[edit] The 19 and 92 Classes

• LMS/BR Power classification, 2P
• Locomotive weight:
  • 19 Class, 53 tons 16 cwt
  • 92 Class, 53 tons 19 cwt
• Boiler pressure, 180 psi
• Superheater, No
• Cylinders, 18"x26"
• Driving wheel diameter, 5' 9"
• Tractive effort, 18,680 lb
• Valve gear, Stephenson

[edit] The 431 and LMS Classes

• LMS/BR Power classification, 2P
• Locomotive weight:
  • 431 Class, 57 tons 17 cwt
  • LMS Class, 59 tons 12 cwt
• Boiler pressure, 180 psi
• Superheater, No
• Cylinders, 18¼"x26"
• Driving wheel diameter, 5' 9"
• Tractive effort, 19,200 lb
• Valve gear, Stephenson

[edit] See also

• Locomotives of the London, Midland and Scottish Railway

[edit] Sources

• Ian Allan ABC of British Railways Locomotives, 1948 edition, part 3, pages 45-46 and 1961 edition, part 3, page 54

[edit] External links

• Photos of 55189
• Rail UK database 439 Class