View source for LNWR Whale Precursor Class

{{distinguish|LNWR Webb Precursor Class}}

{{Short description|Type of steam locomotive}}
{{Use dmy dates|date=April 2017}}
{{Use British English|date=April 2017}}
{{Infobox locomotive
|name            = LNWR Precursor Class (Whale)
|powertype       = Steam
|image           = LNWR engine No. 513 Precursor.jpg
|caption         = No. 513, ''Precursor'' in [[photographic grey]] livery
|designer        = [[George Whale]]
|builder         = LNWR [[Crewe Works]]
|serialnumber    = 4415–4419, 4440–4504, 4510–4549, 4660–4679
|builddate       = 1904–1907
|totalproduction = 130
|gauge           = {{RailGauge|ussg}}
|whytetype       = [[4-4-0]]
|uicclass        = 2′B n2 or 2′B h2 
|leadingdiameter =
|driverdiameter  = {{convert|6|ft|9|in|m|3|abbr=on}}
|locoweight      = {{convert|59.15|LT}}
|boilerpressure  = {{convert|175|psi|MPa|2|abbr=on}}
|cylindercount   = Two
|cylindersize    = {{convert|19|x|26|in|mm|0|abbr=on}} or {{convert|20+1/2|x|26|in|mm|0|abbr=on}}
|valvegear       = [[Joy valve gear|Joy]]
|tractiveeffort  = {{convert|18222|lbf|kN|1|abbr=on}} or {{convert|20640|lbf|kN|1|abbr=on}}
|operator        = [[London and North Western Railway]]<br />→ [[London, Midland and Scottish Railway]]<br />→ [[British Railways]]
|powerclass      = LMS: 2P, 3P
|numinclass      = ''1 January 1923:'' 130<br />''1 January 1948:'' 1
|withdrawndate   = 1927–1949
|disposition     = All scrapped
}}
The [[London and North Western Railway]] (LNWR) '''"Precursor" Class''' was a type of [[4-4-0]] ("American") [[steam locomotive]] designed by the company's [[Chief mechanical engineer|Chief Mechanical Engineer]], [[George Whale]].<ref name="Engineer-1904-04-08">{{cite magazine |author=<!--Not stated--> |date=8 April 1904 |title=Four-coupled Passenger Locomotive |url=https://archive.org/details/sim_engineer_january-1-june-24-1904_97/page/362/mode/1up |magazine=[[The Engineer (UK magazine)|The Engineer]] |volume=97 |location=London |page=362 |via=[[Internet Archive]]}}</ref><ref name="Engineer-1904-04-15">{{cite magazine |author=<!--Not stated--> |date=15 April 1904 |title=Train Experiments on the London and North-western Railway |url=https://archive.org/details/sim_engineer_january-1-june-24-1904_97/page/387/mode/1up |magazine=The Engineer |volume=97 |page=387 |via=Internet Archive}}</ref> Introduced in 1904, it should not be confused with the LNWR [[2-4-0]] [[LNWR Webb Precursor Class|"Precursor" Class]] of 1874 designed by [[Francis Webb (engineer)|Francis Webb]], the last example of which was scrapped in 1895.<ref name="Baxter">{{cite book |last=Baxter |first=Bertram |date=1979 |editor-last=Baxter |editor-first=David |title=British Locomotive Catalogue 1825–1923, Volume 2B: London and North Western Railway and its constituent companies |location=Ashbourne |publisher=Moorland Publishing Company |isbn=0903485842 |pages=260–264}}</ref> In 1906, a [[4-4-2 (locomotive)|4-4-2T]] ("Atlantic") tank variant of Whale's engine, the [[LNWR Precursor Tank Class|"Precursor Tank" Class]], also entered service.<ref name="Engineer-1910-09-23">{{cite magazine |author=<!--Not stated--> |date=23 September 1910 |title=Passenger Tank Engines. No. V |url=https://archive.org/details/sim_engineer_july-december-1910_110/page/336/mode/1up |magazine=The Engineer |volume=110 |location=London |pages=336–337 |via=Internet Archive}}</ref>

==History==

The Precursor Class was essentially a larger version of the [[LNWR Improved Precedent Class|LNWR "Improved Precedent" Class]], being Whale's first attempt at producing a locomotive which would remove the requirement for [[express train]]s to be [[Double heading|double headed]] (then standard practice on the LNWR).<ref name="Steel">{{cite book |last=Steel |first=Wilfred L. |date=1914 |title=The History of the London & North Western Railway |url=https://archive.org/details/cu31924030117307/page/467/mode/1up |location=London |publisher=The Railway and Travel Monthly |pages=467–470 |via=Internet Archive}}</ref> 130 examples of the class were constructed at [[Crewe Works]] between March 1904 and August 1907,<ref name="Williams">{{cite book |last=Williams |first=C. |date=1922 |title=A Register Of All Locomotives Now In Use On The London & North Western Railway |url=https://archive.org/details/registerofallloc00will/page/n4/mode/1up |location=Crewe |publisher=C. Williams |via=Internet Archive}}</ref> their introduction allowing Whale to phase out the unreliable [[compound locomotive]]s favoured by his predecessor, [[Francis Webb (engineer)|Francis Webb]].<ref name="Reed">{{cite book|last=Reed |first=M. C. |date=1996 |title=The London & North Western Railway: A History |url=https://archive.org/details/londonnorthweste0000reed/mode/1up |url-access=registration |location=[[Penryn, Cornwall|Penryn]] |publisher=Atlantic Transport Publishers |isbn=0906899664 |pages=178–180 |via=Internet Archive}}</ref><ref name="Griffiths">{{cite book|last=Griffiths |first=Denis |date=1991 |title=Locomotive Engineers of the LMS and its Major English Constituent Companies |url=https://archive.org/details/locomotiveengine0000grif/mode/1up |url-access=registration |location=[[Sparkford]] |publisher=Patrick Stephens |isbn=1852601426 |pages=64,69 |via=Internet Archive}}</ref><ref name="Yeadon-p39">{{cite book |last=Yeadon |first=Willie B. |date=1995 |author-link=Willie Yeadon |title=A Compendium of LNWR Locomotives 1912–1949. Part One: Passenger Tender Engines |location=Nottingham |publisher=Booklaw/Railbus |isbn=1899624368 |page=39}}</ref>  As built, they were [[Steam#Types of steam and conversions|saturated]], although a small number were fitted with [[superheater]]s between February 1913 and September 1919.<ref name="Baxter"/>

[[File:LNWR Whale Precursor Class No 1117.jpg|thumb|upright=1.44|alt=View of Precursor Class number 1117 ''Vandal'' and crew in front of Shrewsbury engine shed, soon after emerging from Crewe Works in November 1904.|Precursor Class no. 1117 ''Vandal'' at [[Shrewsbury TMD#Histort|Shrewsbury engine shed]], soon after emerging from [[Crewe Works]] in November 1904 (from an old postcard).<ref name="Patrick-2007">{{cite book |last=Patrick |first=David J. |date=2007 |title=The Railway Photographs of P. W. Pilcher |location=Chester |publisher=London & North Western Railway Society |isbn=9780954695149 |pages=12,75}}</ref>]]

Whilst the Precursors created issues for crews as some of the cab controls were difficult to operate or reach,{{sfnp|Griffiths|1991|page=63}} they were generally successful in terms of operating performance.<ref name="Engineer-1904-10-28">{{cite magazine |author=<!--Not stated--> |date=28 October 1904 |title=Railway Matters |url=https://archive.org/details/sim_engineer_july-1-december-30-1904_98/page/419/mode/1up |magazine=The Engineer |volume=98 |location=London |page=419 |via=Internet Archive}}</ref> However, having apparently experienced difficulty keeping time on trials between [[Crewe]] and {{rws|Carlisle}}, they were not used on heavier gradients such as the climb to [[Shap Summit|Shap]].{{efn|A photograph in ''[[The Railway Magazine]]'' also shows a Webb compound [[LNWR Jubilee Class|"Jubilee" Class]] locomotive piloting 282 ''Alaric'' on a London to [[Holyhead]] express near [[Harrow, London|Harrow]] in 1917.<ref>{{cite magazine |last=Mackay |first=F. E. |date=1917 |title=London and North Western Railway |url=https://babel.hathitrust.org/cgi/pt?id=njp.32101076428851&view=1up&seq=421 |magazine=[[The Railway Magazine]] |volume=41 |location=London |page=399 |via=HathiTrust}}</ref>}} A consequence of this was the introduction of an extended version of the Precursors, the [[4-6-0]] [[LNWR Whale Experiment Class|"Experiment" Class]], in 1905.<ref name="Lake">{{cite magazine |last=Lake |first=Charles S. |date= |title=British Locomotive Practice in 1905 |url=https://archive.org/details/sim_engineering-and-boiler-house-review_1905-08_13_8/page/174/mode/1up |magazine=The Engineering Review |volume=8 |number=8 |series=New series |pages=174–177 |via=Internet Archive}}</ref> Nevertheless, double heading was still necessary on many trains north of [[Preston,  Lancashire|Preston]] due to accelerated schedules and increased loads.{{sfnp|Griffiths|1991|page=150}}

In 1910, the Precursors were developed by Whale's successor, [[Charles Bowen-Cooke]], into the {{nowrap|4-4-0}} superheated [[LNWR George the Fifth Class|"George the Fifth" Class]].<ref name="Steel"/><ref name="Engineer-1910-10-07">{{cite magazine |author=<!--Not stated--> |date=7 October 1910 |title=Superheating on London and North-Western Locomotives |url=https://archive.org/details/sim_engineer_july-december-1910_110/page/394/mode/1up |magazine=The Engineer |volume=110 |location=London |page=394 |via=Internet Archive}}</ref> The main visual difference was that the Precursors had separate [[splasher]]s over each of the driving wheels while the Georges had combined splashers that covered both pairs.

The LNWR reused numbers and names from withdrawn locomotives, with the result that the numbering system was completely haphazard.  Starting with the first of the class 513 ''"Precursor"'' in 1913, were given [[superheater]]s, the process continuing until just after grouping in 1923.  Most of the superheated engines were also converted from having [[slide valve]]s to [[Piston valve (steam engine)|piston valves]].

This resulted in two main subclasses; saturated locomotives with {{convert|19|x|26|in}} cylinders, and superheated locomotives with {{convert|20.5|x|26|in}} cylinders.  The LMS gave them the [[power classification]] 3P.  The saturated engines were given the LMS numbers in the 5187–5266 series, though not all survived long enough to receive them.  The superheated engines were given the LMS numbers 5270–5319 (5267–5269 were not used).

The LMS continued to superheat engines until 1926, these rebuilds retained their LMS number.  Also, three superheated engines became saturated via [[boiler]] swaps.

Withdrawals of the saturated engines started in 1927 and the last engine in as built condition was withdrawn in 1935.  The four superheated engines which retained slide valves were withdrawn from 1931 to 1936.  Withdrawals of the superheated engines with piston valves began in 1935.  Those not withdrawn had 20000 added to their numbers from 1934 to 1937 to make room for [[LMS Stanier Class 5 4-6-0|Black Fives]].

By the outbreak of the [[World War II|Second World War]] in September 1939, only 11 Precursors were still in service.<ref name="Baxter"/><ref name="Yeadon-lists">{{harvp|Yeadon|1995|pp=41–42,49}}</ref> A single example, 25297 ''"Sirocco"'', was inherited by [[British Railways]] in 1948, but this was withdrawn in June 1949 before the number it had been allocated (58010) could be applied.<ref name="Casserley-1973">{{cite book |last=Casserley |first=H. C. |author-link=H. C. Casserley |date=1973 |title=Steam Locomotives of British Railways |url=https://archive.org/details/steamlocomotives0000cass/page/73/mode/1up |url-access=registration |location=London |publisher=Hamlyn Publishing |isbn=0600022102 |pages=73,342 |via=Internet Archive}}</ref><ref name="Yeadon-p48">{{harvp|Yeadon|1995|p=48}}</ref>

None were preserved.

==Accidents==

=== Great Bridgeford ===
On 17 June 1932, locomotive number 5278 ''Precursor'' was hauling the 7:23{{nbsp}}[[post meridiem|p.m.]] {{rws|Crewe}} to {{rws|Stafford}} and {{rws|Birmingham New Street}} express passenger service when, at around 7:52{{nbsp}}p.m., the engine and all four coaches derailed just to the south of {{rws|Great Bridgeford}} station, [[Staffordshire]].

Of the 70 to 80 passengers on board the train, three were killed immediately and a fourth died in hospital the next day. Together with the driver and fireman, 9 passengers received injuries serious enough to require hospital care, whilst a further 18 were treated at the scene and able to continue their journeys.<ref name=Hoole3>{{cite book |last=Hoole |first=Ken |authorlink=Ken Hoole |title=Trains in Trouble |volume=3 |year=1982 |publisher=Atlantic Books |location=Redruth |isbn=0906899052 |page=29}}</ref><ref>{{cite report |last=Mount |first=A. H. L. |date=5 January 1933 |title=Report on Train Accidents – London, Midland and Scottish Railway |url=https://www.railwaysarchive.co.uk/documents/BoT_GreatBridgeford1932.pdf |location=London |publisher=Ministry of Transport}}</ref>

== Fleet list ==
{|class="wikitable sortable mw-collapsible mw-collapsed"
|+ class="nowrap" | Table of locomotives
! LNWR No.<ref name="Williams"/> !! Name(s)<ref name="Baxter"/><ref name="Williams"/> !! Crewe<br /> Works No.<ref name="Williams"/> !! Date built<ref name="Williams"/> !! LMS No.<ref name="Baxter"/><ref name="Yeadon-lists"/> !! Date withdrawn{{efn|Although the withdrawal dates listed are drawn from both Baxter<ref name="Baxter"/> and Yaedon,<ref name="Yeadon-lists"/> information from the latter was preferred in the 10 instances where these sources disagreed. Two of Baxter's dates appear to be misprints, namely June 1947 for 25297 ''Sirocco'', and June 1957 for 25302 ''Shamrock''. There are 7 further discrepancies of one month, and one of two months. Differences of a single month could possibly be explained by Yaedon's method of correcting for the fact that until August 1927, LMS stock returns were based on calendar months, but then the company accountants decided to split the year up into periods of 4 weeks.{{sfnp|Yeadon|1995|p=v}} }} !! {{small|Notes}}
|-
|  513 || ''Precursor''          || 4415 || {{dts|1904|03}} || 5278 || {{dts|1936|07}} || {{small|(f)(h)}}
|-
| 1395 || ''Harbinger''          || 4416 || {{dts|1904|03}} || 5291 || {{dts|1937|06}} || {{small|(h)(i)}}
|-
| 1419 || ''Tamerlane''          || 4417 || {{dts|1904|03}} || 5285 || {{dts|1936|03}} || {{small|(h)}}
|-
| 2023 || ''Helvellyn''          || 4418 || {{dts|1904|04}} || 5187 || {{dts|1936|03}} || {{small|(h)(i)}}
|-
| 2164 || ''Oberon''             || 4419 || {{dts|1904|05}} || 5277 || {{dts|1946|08}} || {{small|(h)(i)}}
|-
|    2 || ''Simoom''             || 4440 || {{dts|1904|06}} || 5308 || {{dts|1936|10}} || {{small|(h)}}
|-
|    7 || ''Titan''              || 4441 || {{dts|1904|06}} || 5276 || {{dts|1935|10}} || {{small|(h)}}
|-
|  412 || ''Alfred Paget,''<br/>''Marquis''            || 4442 || {{dts|1904|06}} || 5188 || {{dts|1940|04}} || {{small|(a)(h)(i)}}
|-
|  510 || ''Albatross''          || 4443 || {{dts|1904|06}} || 5189 || {{dts|1933|08}} ||
|-
|  659 || ''Dreadnought''        || 4444 || {{dts|1904|06}} || 5296 || {{dts|1936|05}} || {{small|(h)}}
|-
|  639 || ''Ajax''               || 4445 || {{dts|1904|10}} || 5190 || {{dts|1928|09}} ||
|-
|  648 || ''Archimedes''         || 4446 || {{dts|1904|10}} || 5191 || {{dts|1928|01}} ||
|-
|  685 || ''Cossack''            || 4447 || {{dts|1904|10}} || 5192 || {{dts|1932|04}} ||
|-
|   60 || '' Dragon''            || 4448 || {{dts|1904|10}} || 5298 || {{dts|1938|11}} || {{small|(h)(i)}}
|-
|  106 || ''Druid''              || 4449 || {{dts|1904|10}} || 5294 || {{dts|1937|05}} || {{small|(h)(i)}}
|-
|  301 || ''Leviathan''          || 4450 || {{dts|1904|11}} || 5289 || {{dts|1936|05}} || {{small|(h)}}
|-
|  305 || ''Senator''            || 4451 || {{dts|1904|11}} || 5307 || {{dts|1937|02}} || {{small|(h)(i)}}
|-
|  643 || ''Sirocco''            || 4452 || {{dts|1904|11}} || 5297 || {{dts|1949|06}} || {{small|(h)(i)(j)}}
|-
| 1102 || ''Thunderbolt''        || 4453 || {{dts|1904|11}} || 5193 || {{dts|1931|09}} ||
|-
| 1117 || ''Vandal''             || 4454 || {{dts|1904|11}} || 5194 || {{dts|1931|10}} ||
|-
|  310 || ''Achilles''           || 4455 || {{dts|1904|12}} || 5290 || {{dts|1936|10}} || {{small|(h)}}
|-
|  333 || ''Ambassador''         || 4456 || {{dts|1904|12}} || 5284 || {{dts|1936|08}} || {{small|(h)}}
|-
|  515 || ''Champion''           || 4457 || {{dts|1904|12}} || 5282 || {{dts|1939|12}} || {{small|(h)(i)}}
|-
|  622 || ''Euphrates''          || 4458 || {{dts|1904|12}} || 5195 || {{dts|1927|11}} ||
|-
|  638 || ''Huskisson''          || 4459 || {{dts|1904|12}} || 5196 || {{dts|1933|04}} ||
|-
|  303 || ''Himalaya''           || 4460 || {{dts|1905|01}} || 5305 || {{dts|1936|01}} || {{small|(f)(h)}}
|-
|  645 || ''Mammoth''            || 4461 || {{dts|1905|01}} || 5197 || {{dts|1930|11}} ||
|-
|  806 || ''Swiftsure''          || 4462 || {{dts|1905|01}} || 5318 || {{dts|1935|10}} || {{small|(h)}}
|-
| 1120 || ''Thunderer''          || 4463 || {{dts|1905|01}} || 5310 || {{dts|1939|08}} || {{small|(b)(h)(i)}}
|-
| 1137 || ''Vesuvius''           || 4464 || {{dts|1905|02}} || 5299 || {{dts|1936|08}} || {{small|(h)(i)}}
|-
|  323 || ''Argus''              || 4465 || {{dts|1905|02}} || 5303 || {{dts|1936|10}} || {{small|(f)(h)}}
|-
| 1104 || ''Cedric''             || 4466 || {{dts|1905|02}} || 5199 || {{dts|1933|12}} ||
|-
| 1111 || ''Cerberus''           || 4467 || {{dts|1905|03}} || 5200 || {{dts|1934|09}} ||
|-
| 1431 || ''Egeria''             || 4468 || {{dts|1905|03}} || 5201 || {{dts|1930|11}} ||
|-
| 2064 || ''Jason''              || 4469 || {{dts|1905|03}} || 5273 || {{dts|1931|08}} || {{small|(g)(h)}}
|-
|   40 || ''Niagara''            || 4470 || {{dts|1905|03}} || 5198 || {{dts|1930|11}} ||
|-
|  520 || ''Panopea''            || 4471 || {{dts|1905|03}} || 5202 || {{dts|1934|01}} ||
|-
| 1469 || ''Tantalus''           || 4472 || {{dts|1905|03}} || 5288 || {{dts|1937|03}} || {{small|(h)(i)}}
|-
| 1737 || ''Viscount''           || 4473 || {{dts|1905|03}} || 5316 || {{dts|1936|07}} || {{small|(h)}}
|-
| 2031 || ''Waverley''           || 4474 || {{dts|1905|03}} || 5203 || {{dts|1931|11}} ||
|-
|  365 || ''Alchymist''          || 4475 || {{dts|1905|04}} || 5287 || {{dts|1937|06}} || {{small|(h)(i)}}
|-
| 1115 || ''Apollo''             || 4476 || {{dts|1905|04}} || 5205 || {{dts|1928|02}} ||
|-
| 1545 || ''Cyclops''            || 4477 || {{dts|1905|04}} || 5206 || {{dts|1932|05}} ||
|-
| 1573 || ''Dunrobin''           || 4478 || {{dts|1905|04}} || 5286 || {{dts|1937|09}} || {{small|(h)(i)}}
|-
| 2061 || ''Eglinton''           || 4479 || {{dts|1905|04}} || 5207 || {{dts|1936|08}} || {{small|(h)(i)}}
|-
|  184 || ''Havelock''           || 4480 || {{dts|1905|05}} || 5204 || {{dts|1931|09}} ||
|-
|  366 || ''Medusa''             || 4481 || {{dts|1905|05}} || 5292 || {{dts|1945|04}} || {{small|(h)(i)}}
|-
|  519 || ''Messenger''          || 4482 || {{dts|1905|05}} || 5208 || {{dts|1931|11}} ||
|-
| 2120 || ''Trentham''           || 4483 || {{dts|1905|05}} || 5209 || {{dts|1927|10}} ||
|-
| 1430 || ''Victor''             || 4484 || {{dts|1905|05}} || 5210 || {{dts|1931|10}} ||
|-
|  113 || ''Aurania''            || 4485 || {{dts|1905|07}} || 5211 || {{dts|1936|09}} || {{small|(h)(i)}}
|-
|  300 || ''Emerald''            || 4486 || {{dts|1905|07}} || 5301 || {{dts|1935|10}} || {{small|(h)}}
|-
|  302 || ''Greyhound''          || 4487 || {{dts|1905|07}} || 5304 || {{dts|1947|01}} || {{small|(f)(h)(i)}}
|-
|  315 || ''Harrowby''           || 4488 || {{dts|1905|07}} || 5212 || {{dts|1936|12}} || {{small|(h)(i)}}
|-
|  688 || ''Hecate''             || 4489 || {{dts|1905|07}} || 5274 || {{dts|1935|10}} || {{small|(f)(h)}}
|-
| 1509 || ''America''            || 4490 || {{dts|1905|07}} || 5214 || {{dts|1928|03}} ||
|-
| 1617 || ''Hydra''              || 4491 || {{dts|1905|08}} || 5300 || {{dts|1940|07}} || {{small|(h)(i)}}
|-
| 1723 || ''Scorpion''           || 4492 || {{dts|1905|08}} || 5295 || {{dts|1936|11}} || {{small|(h)}}
|-
| 2062 || ''Sunbeam''            || 4493 || {{dts|1905|08}} || 5279 || {{dts|1939|08}} || {{small|(h)(i)}}
|-
| 2257 || ''Vulture''            || 4494 || {{dts|1905|08}} || 5215 || {{dts|1933|12}} ||
|-
|  311 || ''Emperor''            || 4495 || {{dts|1905|09}} || 5213 || {{dts|1933|05}} || {{small|(h)}}
|-
|  374 || ''Empress''            || 4496 || {{dts|1905|09}} || 5317 || {{dts|1936|06}} || {{small|(h)}}
|-
|  811 || ''Express''            || 4497 || {{dts|1905|09}} || 5311 || {{dts|1941|03}} || {{small|(b)(h)(i)}}
|-
|  911 || ''Herald''             || 4498 || {{dts|1905|09}} || 5216 || {{dts|1936|02}} || {{small|(h)(i)}}
|-
| 1114 || ''Knowsley''           || 4499 || {{dts|1905|09}} || 5217 || {{dts|1933|02}} ||
|-
| 1116 || ''Pandora''            || 4500 || {{dts|1905|09}} || 5218 || {{dts|1936|04}} || {{small|(h)(i)}}
|-
| 1510 || ''Psyche''             || 4501 || {{dts|1905|09}} || 5219 || {{dts|1930|12}} ||
|-
| 1784 || ''Python''             || 4502 || {{dts|1905|10}} || 5220 || {{dts|1931|11}} ||
|-
| 2165 || ''Shooting Star''      || 4503 || {{dts|1905|10}} || 5280 || {{dts|1935|11}} || {{small|(h)}}
|-
| 2202 || ''Vizier''             || 4504 || {{dts|1905|10}} || 5221 || {{dts|1930|12}} ||
|-
|  117 || ''Alaska''             || 4510 || {{dts|1905|10}} || 5222 || {{dts|1933|09}} ||
|-
| 1301 || ''Candidate''          || 4511 || {{dts|1905|10}} || 5225 || {{dts|1936|11}} || {{small|(h)(i)}}
|-
| 1363 || ''Cormwall,''<br/>''Brindley''            || 4512 || {{dts|1905|10}} || 5272 || {{dts|1939|12}} || {{small|(c)(h)(i)}}
|-
| 1396 || ''Harpy''              || 4513 || {{dts|1905|11}} || 5226 || {{dts|1930|11}} ||
|-
| 2007 || ''Oregon''             || 4514 || {{dts|1905|11}} || 5227 || {{dts|1927|10}} ||
|-
| 2012 || ''Penguin''            || 4515 || {{dts|1905|11}} || 5228 || {{dts|1931|10}} ||
|-
| 2115 || ''Servia''             || 4516 || {{dts|1905|11}} || 5229 || {{dts|1932|04}} ||
|-
|  127 || ''Snake''              || 4517 || {{dts|1905|11}} || 5223 || {{dts|1936|11}} || {{small|(h)(i)}}
|-
|  229 || ''Stork''              || 4518 || {{dts|1905|11}} || 5224 || {{dts|1927|11}} ||
|-
| 1439 || ''Tiger''              || 4519 || {{dts|1905|11}} || 5275 || {{dts|1933|01}} || {{small|(g)(h)}}
|-
| 2576 || ''Arab''               || 4520 || {{dts|1905|12}} || 5230 || {{dts|1933|09}} ||
|-
| 2577 || ''Etna''               || 4521 || {{dts|1905|12}} || 5313 || {{dts|1936|02}} || {{small|(h)}}
|-
| 2578 || ''Fame''               || 4522 || {{dts|1905|12}} || 5309 || {{dts|1936|08}} || {{small|(h)}}
|-
| 2579 || ''Ganymede''           || 4523 || {{dts|1905|12}} || 5231 || {{dts|1936|02}} || {{small|(h)}}
|-
| 2580 || ''Problem''            || 4524 || {{dts|1905|12}} || 5232 || {{dts|1931|11}} ||
|-
| 2581 || ''Peel''               || 4525 || {{dts|1905|12}} || 5233 || {{dts|1934|08}} ||
|-
| 2582 || ''Rowland Hill''       || 4526 || {{dts|1905|12}} || 5234 || {{dts|1928|11}} ||
|-
| 2583 || ''Teutonic,''<br/>''The Tsar,''<br/>''Moonstone''          || 4527 || {{dts|1905|12}} || 5235 || {{dts|1935|04}} || {{small|(d)}}
|-
| 2584 || ''Velocipede''         || 4528 || {{dts|1906|01}} || 5312 || {{dts|1935|12}} || {{small|(e)(h)}}
|-
| 2585 || ''Watt''               || 4529 || {{dts|1906|01}} || 5236 || {{dts|1933|12}} ||
|-
|  723 || ''Coptic''             || 4530 || {{dts|1906|02}} || 5239 || {{dts|1936|01}} || {{small|(h)}}
|-
|  837 || ''Friar''              || 4531 || {{dts|1906|02}} || 5240 || {{dts|1933|10}} ||
|-
| 1312 || ''Ionic''              || 4532 || {{dts|1906|02}} || 5242 || {{dts|1930|11}} ||
|-
| 1387 || ''Lang Meg''           || 4533 || {{dts|1906|03}} || 5306 || {{dts|1936|02}} || {{small|(f)(h)}}
|-
| 1642 || ''Lapwing''            || 4534 || {{dts|1906|03}} || 5243 || {{dts|1935|11}} || {{small|(h)}}
|-
| 2513 || ''Levens''             || 4535 || {{dts|1906|03}} || 5293 || {{dts|1939|06}} || {{small|(h)(i)}}
|-
|  234 || ''Pearl''              || 4536 || {{dts|1906|03}} || 5237 || {{dts|1932|02}} ||
|-
|  526 || ''Ilion''              || 4537 || {{dts|1906|03}} || 5238 || {{dts|1928|12}} ||
|-
| 1311 || ''Napoleon''           || 4538 || {{dts|1906|03}} || 5241 || {{dts|1936|01}} || {{small|(h)}}
|-
| 2017 || ''Tubal''              || 4539 || {{dts|1906|03}} || 5244 || {{dts|1935|11}} || {{small|(h)}}
|-
|  282 || ''Alaric''             || 4540 || {{dts|1906|04}} || 5314 || {{dts|1935|11}} || {{small|(h)}}
|-
|  561 || ''Antaeus''            || 4541 || {{dts|1906|04}} || 5245 || {{dts|1941|03}} || {{small|(h)(i)}}
|-
|  675 || ''Adjutant''           || 4542 || {{dts|1906|04}} || 5246 || {{dts|1936|02}} || {{small|(h)}}
|-
|  772 || ''Admiral''            || 4543 || {{dts|1906|04}} || 5247 || {{dts|1927|10}} || 
|-
|  804 || ''Amphion''            || 4544 || {{dts|1906|04}} || 5248 || {{dts|1935|10}} || {{small|(h)}}
|-
|  990 || ''Bucephalus''         || 4545 || {{dts|1906|04}} || 5319 || {{dts|1940|12}} || {{small|(h)(i)}}
|-
|  988 || ''Bellerophon''        || 4546 || {{dts|1906|04}} || 5249 || {{dts|1933|06}} ||
|-
| 1433 || ''Faerie Queene''      || 4547 || {{dts|1906|04}} || 5250 || {{dts|1935|11}} || {{small|(h)}}
|-
| 1650 || ''Richard Trevithick'' || 4548 || {{dts|1906|05}} || 5251 || {{dts|1928|02}} ||
|-
| 1787 || ''Hyperion''           || 4549 || {{dts|1906|05}} || 5252 || {{dts|1930|12}} ||
|-
|    1 || ''Clive''              || 4660 || {{dts|1907|06}} || 5253 || {{dts|1930|11}} ||
|-
|  218 || ''Daphne''             || 4661 || {{dts|1907|06}} || 5254 || {{dts|1933|08}} ||
|-
|  419 || ''Monarch''            || 4662 || {{dts|1907|06}} || 5255 || {{dts|1930|12}} ||
|-
|  564 || ''Erebus''             || 4663 || {{dts|1907|06}} || 5281 || {{dts|1936|09}} || {{small|(h)}}
|-
|  665 || ''Mersey''             || 4664 || {{dts|1907|06}} || 5256 || {{dts|1927|10}} ||
|-
|  469 || ''Marmion''            || 4665 || {{dts|1907|06}} || 5270 || {{dts|1936|05}} || {{small|(f)}}
|-
| 1011 || ''Locke''              || 4666 || {{dts|1907|07}} || 5257 || {{dts|1933|01}} ||
|-
| 1364 || ''Clyde''              || 4667 || {{dts|1907|07}} || 5258 || {{dts|1930|11}} ||
|-
| 2053 || ''Edith''              || 4668 || {{dts|1907|07}} || 5259 || {{dts|1934|03}} ||
|-
| 2181 || ''Eleanor''            || 4669 || {{dts|1907|07}} || 5260 || {{dts|1933|12}} ||
|-
|  276 || ''Doric''              || 4670 || {{dts|1907|07}} || 5261 || {{dts|1927|11}} ||
|-
|  754 || ''Celtic''             || 4671 || {{dts|1907|07}} || 5262 || {{dts|1930|12}} ||
|-
|  802 || ''Gaelic''             || 4672 || {{dts|1907|07}} || 5271 || {{dts|1931|11}} || {{small|(g)}}
|-
|  807 || ''Oceanic''            || 4673 || {{dts|1907|08}} || 5263 || {{dts|1933|12}} ||
|-
|  976 || ''Pacific''            || 4674 || {{dts|1907|08}} || 5264 || {{dts|1928|11}} ||
|-
| 1297 || ''Phalaris''           || 4675 || {{dts|1907|08}} || 5265 || {{dts|1931|10}} ||
|-
| 1309 || ''Shamrock''           || 4676 || {{dts|1907|08}} || 5302 || {{dts|1937|06}} || {{small|(f)(h)(i)}}
|-
| 1516 || ''Alecto''             || 4677 || {{dts|1907|08}} || 5266 || {{dts|1931|10}} ||
|-
| 2011 || ''Brougham''           || 4678 || {{dts|1907|08}} || 5283 || {{dts|1936|03}} || {{small|(h)}}
|-
| 2051 || ''Delamere''           || 4679 || {{dts|1907|08}} || 5315 || {{dts|1936|09}} || {{small|(h)}}
|- class="sortbottom" | style="background-color:#F0F0F0; font-size:small"
|colspan="7" |
{{spaces|2}}(a) Name changed November 1904.<ref name="Yeadon-list1">{{harvp|Yeadon|1995|pp=41–42}}</ref>{{indent|2}}(b) Name removed September 1936.<ref name="Yeadon-list2">{{harvp|Yeadon|1995|p=49}}</ref>{{indent|2}}(c) Name changed May 1911.<ref>{{cite magazine |last=Whitaker |first=J. R. |date=1917 |title=London and North Western Railway Engines [letter] |url=https://babel.hathitrust.org/cgi/pt?id=njp.32101076428851&view=1up&seq=209 |magazine=The Railway Magazine |volume=41 |location=London |page=193 |via=HathiTrust}}</ref><ref name="Yeadon-list2"/>{{indent|2}}(d) Name changed November 1914 and December 1915.<ref name="Yeadon-list1"/>{{indent|2}}(e) Name removed August 1933.<ref name="Yeadon-list2"/>{{indent|2}}(f) Superheater fitted.{{indent|2}}(g) Superheater fitted but later removed.{{indent|2}}(h) Converted to [[LNWR George the Fifth Class]].{{indent|2}}(i) 20000 added to LMS number.{{indent|2}}(j) Allocated, but never carried number 58010  by [[British Railways]].
|}

==See also==
* [[Locomotives of the London and North Western Railway]]

==Notes==
{{notelist}}

==References==
{{reflist}}

===Sources===
*{{Casserley-LocoGrouping3|pages=62–64}}

{{Commonscat|LNWR Whale Precursor class}}

{{LNWR Locomotives}}

[[Category:London and North Western Railway locomotives|Precursor (Whale)]]
[[Category:4-4-0 locomotives]]
[[Category:2′B n2 locomotives]]
[[Category:2′B h2 locomotives]]
[[Category:Railway locomotives introduced in 1904]]
[[Category:Standard-gauge steam locomotives of Great Britain]]
[[Category:Passenger locomotives in the United Kingdom]]
[[Category:Scrapped locomotives]]