NBR H class

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NBR Class I (LNER Class C10)
NBR Class H (LNER Class C11)
Every boy's book of railways and steamships (1911) (14756656164).jpg
Locomotive 872 Auld Reekie departs Edinburgh with an express passenger service.
Type and origin
Power typeSteam
DesignerWilliam Paton Reid
Builder North British Locomotive Co. (16)
Robert Stephenson & Co. (6)
Build date1906 (1st batch)
1911 (2nd batch)
1921 (3rd batch)
Total produced22
Specifications
Configuration:
   Whyte 4-4-2
Gauge 4 ft 8+12 in (1,435 mm)
Leading dia. 3 ft 6 in (1.07 m)
Coupled dia.6 ft 9 in (2.06 m)
Trailing dia. 4 ft 3 in (1.30 m)
Length59 ft (18 m)
Loco weight119 long tons 8 cwt (267,500 lb or 121.3 t)
Fuel typecoal
Boiler pressure190 psi (1,300 kPa) (C10)
180 psi (1,200 kPa) (C11)
Cylinders two outside
Cylinder size 20 in × 28 in (510 mm × 710 mm) (C10)
21 in × 28 in (530 mm × 710 mm) (C11)
Performance figures
Tractive effort C10: 22,331 lbf (99.33 kN)
C11: 23,324 lbf (103.75 kN)
Career
Operators North British Railway
London and North Eastern Railway
NicknamesNorth British Atlantic
DispositionAll scrapped

The North British Atlantic, later known as NBR Class H, and then as LNER Class C11 was a class of 4-4-2 steam locomotive of the North British Railway. The class was designed by William P. Reid, Locomotive Superintendent of the NBR, and entered service under his direction. They were the heaviest, longest, and most powerful (by tractive effort) locomotives ever employed on the North British Railway.

Contents

The locomotives passed to the London and North Eastern Railway in 1923. They had a long service life, but most were withdrawn during 1936 and 1937, with none surviving into the nationalised British Railways system.

The NBR Class I, later known as LNER Class C10, was a temporary designation of some engines in this class (see below).

Design

In the early twentieth century the North British Railway possessed an ageing locomotive fleet which had not kept pace with modern demands. On the Board of Directors Dr John Inglis argued strongly for investment in the construction of new locomotives. Ultimately it was the persuasive arguments of Inglis, and the design skills of Locomotive Superintendent William Paton Reid, which led to the development of the NBR's new flagship locomotive, the North British Atlantic. [1] The NBR Board met on 2 November 1905 and approved the construction of 14 heavy express passenger locomotives, with design work to commence immediately. The designs were drawn up by NBR Chief Draughtsman Walter Chalmers and were presented to the Board on 5 January 1906, tenders were invited on 13 January 1906, and the order placed before the end of the month.

Many railways were, in this era, constructing powerful express passenger locomotives of the 4-6-0 type, which benefit from 6 coupled driving wheels. The North British Railway's principal passenger engines had hitherto been of the 4-4-0 type, meaning that 4-coupled drive was more familiar. Additionally, the NBR had some very tight curves, for which the use of the "Atlantic" type engine with its 4-4-2 wheel arrangement was simply more practical and efficient. [2]

Build dates

The 14 locomotives were constructed and supplied during 1906. Having established themselves as the most powerful passenger locomotives on the North British network, but being insufficient in number to operate all of the crack express services, a further 6 engines were ordered and constructed during 1911. The construction of these 6 additional engines received widespread publicity internationally. [3] Finally two more engines were ordered at the very end of 1920; these were constructed during 1921, and entered service that year.[ citation needed ]

Reception

A North British Atlantic illustrated in Railway & Locomotive Engineering magazine of New York. Railway and locomotive engineering - a practical journal of railway motive power and rolling stock (1907) (14574329360).jpg
A North British Atlantic illustrated in Railway & Locomotive Engineering magazine of New York.

The North British Railway was overly ambitious in its advertising of the new locomotives, and despite rapid construction, the engines were not ready in time for the new timetables which they had been designed to serve. It was also discovered that owing to their size, the locomotives would not fit on the turntables owned by the North British Railway. This led to considerable operating difficulty until the turntables at key towns and cities could be enlarged. There was also some opposition to the use of the engines, particularly from James Bell, the NBR Civil Engineer, who felt that the engines were so heavy and powerful that they would cause damage to the permanent way for which he was responsible. [1] :16

Alleged poor initial performance by the locomotives seems to have had more to do with poor management than poor design. Contemporary records[ which? ] show poor communication between the locomotive department (supplying engines) and the traffic department (requesting locomotives and matching them to services), as well as possibly unwarranted criticism from James Bell and others. Having become established, the locomotives gave good service for many years, and were the company's flagship engines, or "pride of the fleet". [4]

Rebuilding and designation

Starting in 1915, all engines in the class were fitted with superheaters. The final two engines, built in 1921, were fitted with superheaters from the outset. [2]

The North British Railway did not historically give special designations to different locomotive classes, and in company records of the period 1906 and 1907, the atlantics are simply referenced as "Our new passenger locomotive". [1] :30 In later documentation, in 1908, 1909, and 1910, the engines are referenced as "locomotives of the atlantic type" or "our atlantic type engines". By the start of World War One the company was using a system of class designations, under which the North British Atlantics became known as Class H. Once the programme to fit superheaters had commenced, the saturated locomotives (those without a superheater) were re-designated as Class I, each one reverting to Class H again once its superheater had been fitted.[ citation needed ]

in 1923 the North British Railway became part of the LNER, during the superheating programme. The LNER designation for Class H engines was Class C11. However, as six engines were not yet superheated, and therefore inherited by the LNER as Class I engines, these were given LNER designation of Class C10. They reverted to the C11 designation, one by one, as their superheaters were installed between 1923 and 1925. [2]

Table of locomotives

Number (NBR)Number (LNER)NameBuilderWorks numberEntered ServiceWithdrawnNotes
8689868 Aberdonian NB Locomotive Co 1736919061933First of class in service.
8699869 Dundonian (until 1912)
Bonnie Dundee (after 1912)
NB Locomotive Co1737019061935
8709870 Bon Accord NB Locomotive Co1737119061937
8719871 Thane of Fife NB Locomotive Co1737219061935
8729872 Auld Reekie NB Locomotive Co1737319061935
8739873 St Mungo NB Locomotive Co1737419061934
8749874 Dunedin NB Locomotive Co1737519061933First of class withdrawn.
8759875 Midlothian NB Locomotive Co1737619061937Preserved 1938. Scrapped 1939.
8769876 Waverley NB Locomotive Co1737719061937
8779877 Liddesdale NB Locomotive Co1737819061936
8789878HazeldeanNB Locomotive Co1737919061936
8799879 Abbotsford NB Locomotive Co1738019061936
8809880 Tweeddale NB Locomotive Co1738119061936
8819881BordererNB Locomotive Co1738219061936
9019901 St Johnstoun R Stephenson & Co 342819111937
9029902 Highland Chief R Stephenson & Co342919111936
9039903 Cock o' the North (until 1934)
Aberdonian (from 1934)
R Stephenson & Co343019111937Hauled funeral train for Douglas Haig, 1st Earl Haig. [5]
9049904 Holyrood R Stephenson & Co343119111936
9059905 Buccleuch R Stephenson & Co343219111937
9069906 Teribus R Stephenson & Co343319111937
5099509 Duke of Rothesay NB Locomotive Co2268919211937
5109510 The Lord Provost NB Locomotive Co2269019211936

Accidents

The North British Atlantics enjoyed a good safety record throughout their career. Early concerns about their weight (as expressed by James Bell) and their centre of gravity (leading William Jackson, NBR General Manager, to order an expensive "swing test" of an engine in January 1907[ clarification needed ]) proved unfounded. Nonetheless, engines of the class were involved in a number of incidents and accidents, of which the following are the most notable.

Preservation

Locomotives of this class were withdrawn from service in the 1930s. Two in 1933, one in 1934, three in 1935, then eight in 1936, and eight in 1937. The final locomotive withdrawn was Midlothian in December 1937. In a remarkable piece of railway history, an order was issued that Midlothian should be preserved for the nation, as an example of such an important class of locomotive, but the order was not received until after the engine had been scrapped at Cowlairs. So that the national collection was not denied a Class H engine, Midlothian (whose component parts were mostly still in existence, and frame still fully intact) was painstakingly rebuilt, and returned to service for transfer to the LNER Railway Museum at York (which later formed part of the basis of the National Railway Museum). Several parts of the locomotive had been disposed of, including one main connecting rod, and these were built new for the restored engine. Unfortunately, just a few months later the Second World War commenced, and there was a massive demand for metal to produce aircraft for the war effort. The newly rebuilt Midlothian was withdrawn from the museum stock, and scrapped for a second time, to provide aircraft-building materials. [1] :19

Models

The NBR H class is available as a commercially produced O gauge model by specialist NBR model company 62C Models. Several live-steam models of North British Atlantics have been built in 5 in (127 mm) gauge. The 7+14 in (184 mm) gauge locomotive Trojan (built 1928/29) is a historically important miniature railway locomotive[ according to whom? ] whose design was based upon that of the North British Atlantic. Trojan was the oldest locomotive of the world's oldest miniature railway, the Saltwood Miniature Railway, until its closure in 1987. The locomotive still operates and is privately owned.[ as of? ]

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References

  1. 1 2 3 4 5 6 Thomas, John (1972). The North British Atlantics. David and Charles. ISBN   0-7153-5588-0.
  2. 1 2 3 "The Reid Class C10 and C11 (NBR I and H) 4-4-2 Atlantics". The London & North Eastern Railway Encyclopedia. Retrieved 4 February 2016.
  3. See the contemporary report by Frederick C Coleman in Scientific American, published 11 November 1911.
  4. See, for example, introductory comments on the Locomotives page, at North British Railway Study Group.
  5. Lynn, Bill (March 2013). "North British Railway Study Group Journal Number 100-119". North British Railway Study Group Journal. 118. Retrieved 13 November 2020.
  6. UK fatal train crash records.
  7. Railway Archive accident report by Major J W Pringle, Board of Trade.