LMS Jubilee Class

LMS Jubilee Class

Infobox Locomotive
powertype=Steam
name = LMS Jubilee Class



caption = 45641 Sandwich at Chinley, 14 August 1954.
designer = William Stanier
builder = LMS Crewe Works
LMS Derby Works
North British Loco
builddate = 1934–1936
totalproduction = 191
whytetype = 4-6-0
uicclass = 2'Ch
gauge = RailGauge|ussg
leadingsize = convert|39.5|in|m|3|abbr=on
driversize = convert|81|in|m|3|abbr=on
length = 64 ft 8¾ in
weight = 3A: convert|79.55|LT|t|1
2A: convert|82.00|LT|t|1
fueltype = Coal
fuelc
convert|9.0|LT|t|1
waterc
convert|4000|impgal|l|abbr=on|lk=on
cylindercount = Three
cylindersize = 17× 26 in (432×660 mm)
valvegear= Walschaerts, piston valve
boiler=LMS type 3A, two rebuilt with type 2A
firearea =
boilerpressure = 3A: convert|225|psi|MPa|2|abbr=on|lk=on superheated
2A: convert|250|psi|MPa|2|abbr=on|lk=on superheated
tractiveeffort = 3A: convert|26610|lbf|kN|2|abbr=on|lk=on
2A: convert|29570|lbf|kN|2|abbr=on
railroadclass=LMS: 5XP, later 6P, later 7P
retiredate = 1952 (1), 1960–1967
The London Midland and Scottish Railway (LMS) Jubilee Class was a class of steam locomotive designed for mainline passenger work. 191 locomotives were built between 1934 and 1936. They were built concurrently with the LMS Stanier Class 5 4-6-0.

Overview

The last 5 Patriots of Henry Fowler's Patriot class on order, 5552 to 5557, were built with William Stanier’s taper boiler and so became the first of the Jubilee class. 113 locomotives were ordered straight from the drawing board. They were initially a disappointment; their moderate degree of superheating often left them short of steam. Changes to the blastpipe and chimney dimensions helped to transform them.

On 29 April 1935 no. 5552, the first of the class, permanently swapped identities with no. 5642 which had been named "Silver Jubilee" on 19 April 1935. This change thus giving the name to the rest of the class, see LMS Jubilee Class 5552 Silver Jubilee.

They are often associated with the Midland Division, i.e. the lines inherited from the former Midland Railway. This is because until the late 1950s, it was rare for any 7P locomotives to work south of Leeds. Until then, Jubilees were the largest express engine normally found on the lines running out of St Pancras or radiating from Derby. They could nevertheless be found on main lines throughout the former LMS system.

Construction

Although built over only a 3 year period the class had many variations due to improvements being made as they were built. The major differences were:

Boilers - 10 variations, mainly affecting the number of tubes. The earlier boilers were domeless but later boilers were domed. There were 2 sizes of fire grate area depending on whether the firebox throatplate was straight or sloping.

Bogies - Approximately 50 of the earlier locomotives were built with ex-Claughton bogies which had a 6’3” wheelbase compared to the later locomotives built with new bogies that had a wheelbase of 6’ 6”.

Smokebox Saddle - The first 113 locomotives were built with a 2 piece saddle, the rest had a conventional 1 piece saddle.

Tenders – 3 basic patterns were fitted; Fowler 3,500 gall. Fowler high-sided (10 off) and Stanier 4,000 gall. However, taking into account rivets, wheelbase, and welds this can be subdivided into a total of 8 patterns.

Technical

* Power Classification:
** 5XP reclassified 6P in 1951, 6P5F in 1955 although 6P continued to be painted on cabsides.
** Rebuilds reclassified 7P in 1951
* Introduced: 1934-1936, 2 rebuilt with 2A boilers in 1942
* Designer: William Stanier
* Weights:
** Loco - 79 tons 11 cwt (orig.), 82 t 0 cwt (rebuilt)
** Tender - 54 t 13 cwt
* Driving Wheel: 6 ft 9 in
* Boiler pressure: 225 psi superheated (orig.), 250 psi superheated (reblt.)
* Cylinders (3): 17 in x 26 in
* Tractive Effort: 26,610 lbf (orig.), 29,570 lbf (rblt.)
* Valve Gear: Walschaerts (piston valves)

Details

Withdrawal

45637 "Windward Islands" was scrapped in 1952 due to damage sustained in the Harrow and Wealdstone rail crash. The remaining locomotives were withdrawn between 1961 and 1967.

Preservation

Four jubilees have been preserved, (4)5593 "Kolhapur", (4)5596 "Bahamas" and (4)5690 "Leander" have been worked in preservation.

The fourth, (4)5699 "Galatea", was saved from Woodham's Scrapyard as a rusting hulk and is slowly being restored. She requires one new set of driving wheels after one of hers was cut up in Barry when she was derailed.

References

* John F. Clay “Jubilees of the LMS”, Ian Allan published 1971
* J W P Rowledge and Brian Reed “The Stanier 4-6-0s of the LMS”, David & Charles published 1977
* “The Book of the Jubilee 4-6-0s”, Edited by Chris Hawkins ISBN 1-903266-27-0
* Hugh Longworth "British Railway Steam Locomotives 1948-1968" ISBN 0-86093-593-0

External links

* [http://www.jubilees.co.uk Jubilees]
* [http://www.railuk.co.uk/steam/getsteamclass.php?item=JUBE RailUK]


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