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LMS Class 7F 0-8-0

The London, Midland and Scottish Railway Fowler Class 7F was a class of 0-8-0 steam locomotives. They were a Midlandised version of the London and North Western Railway (LNWR) Class G2 and Class G2A 0-8-0s. They were also classified as Class G3 under the former LNWR system. The class were sometimes known as Baby Austins, or Austin 7s, after a motor car that was becoming popular at the time.

LMS 7F 0-8-0
49592 at Aintree, June 1948.
Type and origin
Power typeSteam
BuilderLMS Crewe Works
Build date1929–1932
Total produced175
Specifications
Configuration:
 • Whyte0-8-0
 • UICD h2G
Gauge4 ft 8+12 in (1,435 mm)
Driver dia.4 ft 8+12 in (1,435 mm)
WheelbaseLoco: 18 ft 3 in (5.56 m)
Length56 ft 1 in (17.09 m)
Loco weight60.75 long tons (61.72 t; 68.04 short tons)
Tender weight41.20 long tons (41.86 t; 46.14 short tons)
Total weight101.95 long tons (103.59 t; 114.18 short tons)
Fuel typeCoal
Fuel capacity4 long tons (4.1 t; 4.5 short tons)
Water cap.3,500 imp gal (16,000 L; 4,200 US gal)
Firebox:
 • Firegrate area
23.5 sq ft (2.18 m2)
BoilerLMS type G7¾S
Boiler pressure200 lbf/in2 (1.38 MPa)
Heating surface:
 • Tubes and flues
1,434 sq ft (133.2 m2) later 1,402 sq ft (130.3 m2)
 • Firebox150 sq ft (14 m2)
Superheater:
 • Heating area353 sq ft (32.8 m2) to 338 sq ft (31.4 m2)
CylindersTwo
Cylinder size19+12 in × 26 in (495 mm × 660 mm)
Valve gearWalschaerts, piston valves
Performance figures
Tractive effort29,745 lbf (132.31 kN)
Career
Power class7F
Numbers
  • LMS: 9500–9674
  • BR: 49500–49674
Nicknames
  • Baby Austins
  • Austin Sevens
Withdrawn1949–1962
DispositionAll scrapped

Overview edit

 
49560 with a typical freight duty in 1950

It featured a Belpaire firebox and increased boiler pressure over its predecessor but had the same power rating of 7F. Unfortunately the design had been done at the old Midlands Railway's Derby Works and the drawing office staff insisted on using Midland practice. Among other things this meant that the axle bearings were too small for the loads they had to carry. E.S. Cox, writing in a series of articles in Trains Illustrated c. 1957, suggests that they had a sufficiently modern and effective front end that, for steady slogging, some drivers preferred them to an LMS Stanier Class 8F. However, this also meant that, with bearings comparable to an LMS Fowler Class 4F and already inadequate for the lower powered engine, the bearings broke up rapidly.

Numbering edit

Number Lot
Number
Date
built
Crewe Works
serial Nos.
LMS BR
9500–99 49500–99 57 1929 5872–5971
9600–02 49600–02 71 1930 6047–49
9603–19 49603–19 71 1931 6050–66
9620–32 49620–32 81 1931 1–13
9633 49633 81 1932 14
9634–35 49634–35 81 1931 15–16
9636–59 49636–59 81 1932 17–40
9660–74 49660–74 84 1932 41–55

Equipment edit

Numbers 9672–74 were fitted with ACFI feedwater heaters when built but these were removed during the Second World War. After the war, five were briefly converted to oil burning.

British Railways edit

All members of the class entered British Railways ownership in 1948, but 122 had been withdrawn by the end of 1951; fifty were withdrawn without receiving their BR number. They had a fairly short life, and all were withdrawn and scrapped between 1949 and 1962, some time before the final G2s were withdrawn in 1964.

Accidents and incidents edit

  • On 13 March 1935, a milk train, hauled by LMS Compound 4-4-0 No. 1165, was in a rear-end collision with an express freight train, hauled by LNWR Claughton Class 4-6-0 No. 5946, at King's Langley, Hertfordshire due to a signalman's error. Another freight train, hauled by LMS Patriot Class 4-6-0 No. 5511, collided with the wreckage. Locomotive no. 9598 was hauling a coal train that ran into the wreckage. One person was killed.[1]
  • On 14 May 1948, a locomotive of the class was hauling a freight train that ran away and was in collision with an empty stock train at Battyeford, Yorkshire.[2]

Withdrawal edit

All engines were withdrawn between 1949 and 1962.

Table of withdrawals
Year Quantity in
service at
start of year
Quantity
withdrawn
Locomotive numbers
1949 175 61 9504/07/12/17–18/21–22/27–28/30/33–34/42/46/49–50/59/65/73/75–77/84/97/99,
9601/04/06/13–14/16/26/29/32–33/39/42/44–46/52/54/56/58/69–70,
49513/25–26/39/51–52/64/81/84, 49607/11/22/30/43/47.
1950 114 37 9514/29, 9619/21,
49500–01/16/19–20/31/35/37/41/43/53/56/61/67/69/74–75/79/83/96,
49605/09/15/28/34–36/41/49/51/53/55/65.
1951 77 24 49502/10/23/40/58/68/71/80/85/87/89–90/93–95,
49610/17/23/25/31/50/60/63/73.
1952 53 6 49506/48/63/91, 49661/71.
1953 47 4 49524, 49600/08/12.
1954 43 2 49503, 49602.
1955 41 3 49554/57/70.
1956 38 6 49532/52, 49603/20/38/66.
1957 32 12 49536/38/45/47/55/60/66, 49648/57/59/64/72.
1958 20 0
1959 20 11 49509/11/15/78/82/86/92/98, 49640/62/67.
1960 9 4 49505/44, 49624/74.
1961 5 4 49618/27/37/68.
1962 1 1 49508.

References edit

  1. ^ Hall, Stanley (1990). The Railway Detectives. London: Ian Allan. p. 99. ISBN 0 7110 1929 0.
  2. ^ Earnshaw, Alan (1990). Trains in Trouble: Vol. 6. Penryn: Atlantic Books. p. 28. ISBN 0-906899-37-0.
  • Ian Allan ABC of British Railways Locomotives, summer 1961 edition, part 3, page 52
  • Rowledge, J.W.P. (1975). Engines of the LMS built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.

External links edit

  • Class 7F-B Details at Rail UK
  • 1935 photo from the late Alan Whitehead collection

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The London Midland and Scottish Railway Fowler Class 7F was a class of 0 8 0 steam locomotives They were a Midlandised version of the London and North Western Railway LNWR Class G2 and Class G2A 0 8 0s They were also classified as Class G3 under the former LNWR system The class were sometimes known as Baby Austins or Austin 7s after a motor car that was becoming popular at the time LMS 7F 0 8 049592 at Aintree June 1948 Type and originPower typeSteamBuilderLMS Crewe WorksBuild date1929 1932Total produced175SpecificationsConfiguration Whyte0 8 0 UICD h2GGauge4 ft 8 1 2 in 1 435 mm Driver dia 4 ft 8 1 2 in 1 435 mm WheelbaseLoco 18 ft 3 in 5 56 m Length56 ft 1 in 17 09 m Loco weight60 75 long tons 61 72 t 68 04 short tons Tender weight41 20 long tons 41 86 t 46 14 short tons Total weight101 95 long tons 103 59 t 114 18 short tons Fuel typeCoalFuel capacity4 long tons 4 1 t 4 5 short tons Water cap 3 500 imp gal 16 000 L 4 200 US gal Firebox Firegrate area23 5 sq ft 2 18 m2 BoilerLMS type G7 SBoiler pressure200 lbf in2 1 38 MPa Heating surface Tubes and flues1 434 sq ft 133 2 m2 later 1 402 sq ft 130 3 m2 Firebox150 sq ft 14 m2 Superheater Heating area353 sq ft 32 8 m2 to 338 sq ft 31 4 m2 CylindersTwoCylinder size19 1 2 in 26 in 495 mm 660 mm Valve gearWalschaerts piston valvesPerformance figuresTractive effort29 745 lbf 132 31 kN CareerPower class7FNumbersLMS 9500 9674BR 49500 49674NicknamesBaby AustinsAustin SevensWithdrawn1949 1962DispositionAll scrapped Contents 1 Overview 2 Numbering 3 Equipment 4 British Railways 5 Accidents and incidents 6 Withdrawal 7 References 8 External linksOverview edit nbsp 49560 with a typical freight duty in 1950It featured a Belpaire firebox and increased boiler pressure over its predecessor but had the same power rating of 7F Unfortunately the design had been done at the old Midlands Railway s Derby Works and the drawing office staff insisted on using Midland practice Among other things this meant that the axle bearings were too small for the loads they had to carry E S Cox writing in a series of articles in Trains Illustrated c 1957 suggests that they had a sufficiently modern and effective front end that for steady slogging some drivers preferred them to an LMS Stanier Class 8F However this also meant that with bearings comparable to an LMS Fowler Class 4F and already inadequate for the lower powered engine the bearings broke up rapidly Numbering editNumber LotNumber Datebuilt Crewe Worksserial Nos LMS BR9500 99 49500 99 57 1929 5872 59719600 02 49600 02 71 1930 6047 499603 19 49603 19 71 1931 6050 669620 32 49620 32 81 1931 1 139633 49633 81 1932 149634 35 49634 35 81 1931 15 169636 59 49636 59 81 1932 17 409660 74 49660 74 84 1932 41 55Equipment editNumbers 9672 74 were fitted with ACFI feedwater heaters when built but these were removed during the Second World War After the war five were briefly converted to oil burning British Railways editAll members of the class entered British Railways ownership in 1948 but 122 had been withdrawn by the end of 1951 fifty were withdrawn without receiving their BR number They had a fairly short life and all were withdrawn and scrapped between 1949 and 1962 some time before the final G2s were withdrawn in 1964 Accidents and incidents editOn 13 March 1935 a milk train hauled by LMS Compound 4 4 0 No 1165 was in a rear end collision with an express freight train hauled by LNWR Claughton Class 4 6 0 No 5946 at King s Langley Hertfordshire due to a signalman s error Another freight train hauled by LMS Patriot Class 4 6 0 No 5511 collided with the wreckage Locomotive no 9598 was hauling a coal train that ran into the wreckage One person was killed 1 On 14 May 1948 a locomotive of the class was hauling a freight train that ran away and was in collision with an empty stock train at Battyeford Yorkshire 2 Withdrawal editAll engines were withdrawn between 1949 and 1962 Table of withdrawals Year Quantity inservice atstart of year Quantitywithdrawn Locomotive numbers1949 175 61 9504 07 12 17 18 21 22 27 28 30 33 34 42 46 49 50 59 65 73 75 77 84 97 99 9601 04 06 13 14 16 26 29 32 33 39 42 44 46 52 54 56 58 69 70 49513 25 26 39 51 52 64 81 84 49607 11 22 30 43 47 1950 114 37 9514 29 9619 21 49500 01 16 19 20 31 35 37 41 43 53 56 61 67 69 74 75 79 83 96 49605 09 15 28 34 36 41 49 51 53 55 65 1951 77 24 49502 10 23 40 58 68 71 80 85 87 89 90 93 95 49610 17 23 25 31 50 60 63 73 1952 53 6 49506 48 63 91 49661 71 1953 47 4 49524 49600 08 12 1954 43 2 49503 49602 1955 41 3 49554 57 70 1956 38 6 49532 52 49603 20 38 66 1957 32 12 49536 38 45 47 55 60 66 49648 57 59 64 72 1958 20 0 1959 20 11 49509 11 15 78 82 86 92 98 49640 62 67 1960 9 4 49505 44 49624 74 1961 5 4 49618 27 37 68 1962 1 1 49508 References edit Hall Stanley 1990 The Railway Detectives London Ian Allan p 99 ISBN 0 7110 1929 0 Earnshaw Alan 1990 Trains in Trouble Vol 6 Penryn Atlantic Books p 28 ISBN 0 906899 37 0 Ian Allan ABC of British Railways Locomotives summer 1961 edition part 3 page 52 Rowledge J W P 1975 Engines of the LMS built 1923 51 Oxford Oxford Publishing Company ISBN 0 902888 59 5 External links edit nbsp Wikimedia Commons has media related to LMS Fowler Class 7F 0 8 0 Class 7F B Details at Rail UK 1935 photo from the late Alan Whitehead collection Retrieved from https en wikipedia org w index php title LMS Class 7F 0 8 0 amp oldid 1181613504, wikipedia, wiki, book, books, library,

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