LMS CONSTITUENT COMPANIES
The following madeup the London, Midland and Scottish Railway as a result of the Railways Act 1921:
CONSTITUENTCOMPANIES
RailwayCompany Route miles/km Notes
Caledonian Railway 1,114½miles (1,794km)
FurnessRailway 158miles (254km)
Glasgow andSouth Western Railway 493½ miles(794km)
Highland Railway 506miles (814km)
Londonand North WesternRailway 2,667½miles(4,293km)Amalgamatedwith the Lancashireand Yorkshire Railway(L&YR)on 1stJanuary 1922
Midland Railway 2,170¾miles (3,493km)
North StaffordshireRailway 220¾ miles(355km)
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Two viewsofthe locomotiveinvolvedin the Culgaith incident, No. 5971Croxteth, bothin LMSlivery.
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First Classinterior. ThirdClassinterior.
INTRODUCTION
The FellDiesel-MechanicalLocomotivewasbuilt in the LMR Derby LocomotiveWorksin 1950. The design was basedon a new principle in diesel power application and transmission, asproposed byLt. Col. Fell, andthelocomotivewasjointly developed byMr. H. G.Ivatt, theLMR ChiefMechanicalEngineer atthetime.
Theaimofthedesignwasto reducetransmission lossesas comparedwith dieselelectric traction andalsoto reproduce the performancecharacteristics of the steamlocomotive as far aspracticable. Forthis purpose,the four main engines are superchargedand governed to produce substantially constanthorsepoweroverthespeedrange.Theoutput ofthe enginesiscombined in aspeciallydesignedgearbox.
The primary objectofthe tests wasto establish the drawbar power characteristics and corresponding fuel
consumption over the whole working range of the locomotive.Additional testswerecarriedouttoinvestigate particular aspectsofdesign.
As received, the performance of the locomotive, particularly in the low speedrange,wasnot asgoodas anticipated. The first part of the tests was,therefore, occupied in tuning the locomotive and a substantial improvement wasachieved.
THE LOCOMOTIVE
The motive power consistsof four DieselEngines,each rated at amaximum of 510b.h.p.andsuperchargedbytwo separatelydriven blowers.Theblowers,together with the other auxiliaries, aredriven bytwo A.E.C.DieselEngines, eachwith amaximumoutput of 150b.h.p.
In order to achievetheconstant horsepowerrequired, with the correspondingfalling torque characteristic, the main enginegovernors aredesignedto reducethe amount of fuel injected asthe speedincreases.Also the blower capacity is limited sothatthe boostpressurefalls from approximately 10lb/sq.in at a main engine speed of 500 r.p.m. to 2 lb/sq.in at 1,500r.p.m. by automatic adjustment of theauxiliary enginespeed.
The transmission from the main enginesto the road wheelsisbymeansof agearboxincorporating differential gears,eachenginebeing connectedto the gearboxthrough ascoopcontrolled fluid coupling.Eachofthetwo primary differentials combinestheoutput of thepair of enginesat oneendof the locomotive andthe secondarydifferential couplesthe outputs from theseprimary differentials and passesthe torque through fixed ratio gearing to the intermediate driving axlesof thelocomotive.Thepurpose ofthegearboxisto extendthespeedrangeofthelocomotive beyond that which could beobtained by adirect drive from asinglepowerunit.
Considering the differentials alone,theireffectis to decreasethe gear ratio assuccessiveengines are engaged. Thus,with oneenginedriving the ratio is 4:1,with two engines2:1,with threeengines1.1/3:1,andwith four engines 1:1.Ineachcasethesametotal torque ismaintained, but the speedrangeisextended.Forexample,asthesecondengines
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STOCKPORT EDGELEY
it is likely to besometime between 1965and1967whenboth No.70015and45225were allocated to 9B.
Stockport shed wasopenedfor use on24thMay1883bytheLondon &North WesternRailway,after thegroupingin1923 theshedwasplacedintheWestern‘A’Division asa sub-shedofLongsight(16).TheLMSreplacedtheshedroof with a ‘singlepitch’ design inthe early1930s,andallocatedthe code9Bin1935.The60foot turntable, which datedfrom 1927, wasfitted with a vacuum tractor at a costof£210inthebusywartimeconditions of1942,atwhichtime a newwater column andashpit werealsoadded.Theshed became hometo WDs, Stanier 5MTsand8Fsaswell asBRStandard locos from the late1950s,replacingolder enginesasthey werewithdrawn. Stockport Edgeleyclosedon6th May1968.
Anearly morning sceneat StockportEdgeleyshed (9B)with locomotives preparedand ready for their day’sduties. From left to right weseeStanier‘BlackFive’4-6-0No.44946, Standard7MT4-6-2 No.70015Apollo and two more ‘Black Fives’,Nos.45225and 44826.Although the imageis undated
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