GWR Cathedral Class: Difference between revisions
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=== Design === |
=== Design === |
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The GWR Cathedral Class would have featured similar features from other locomotives in the UK, such as having 4-cylinders, an all-new tender design from the [[GWR 4900 Class|GWR Hall Class]] and [[GWR 1000 Class|1000 "County" Class]] that would come years later, same pony truck from the King Class 4-6-0s, different trailing bogie design coming from the [[LMS Princess Royal Class]] 4-6-2 Pacifics and, the same body design from the [[LMS Princess Royal Class]] 4-6-2 Pacifics but designed with the same smokebox design from the GWR Star Class.<ref name=":1" /> |
The GWR Cathedral Class would have featured similar features from other locomotives in the UK, such as having 4-cylinders, an all-new tender design from the [[GWR 4900 Class|GWR Hall Class]] and [[GWR 1000 Class|1000 "County" Class]] that would come years later, same pony truck from the [[GWR 6000 Class|King Class 4-6-0s]], different trailing bogie design coming from the [[LMS Princess Royal Class]] 4-6-2 Pacifics and, the same body design from the [[LMS Princess Royal Class]] 4-6-2 Pacifics but designed with the same smokebox design from the [[GWR 4000 Class|GWR Star Class]].<ref name=":1" /> |
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The locomotive was also designed to have its boiler pressure raised from the {{Convert|225|psi|MPa|abbr=on}} on the [[GWR 4073 Class|GWR Castle Class]] to {{Convert|250|psi|MPa|abbr=on}} for the Cathedral Class.<ref name=":2">{{Harvp|Jackson|2018|p=175}}</ref> The locomotive's tractive effort was raised from {{Convert|31,625|lbf|kN|abbr=on}} on the [[GWR 4073 Class|GWR Castle Class]] to have {{Convert|40,300|lbf|kN|abbr=on}} on the Cathedral Class.<ref name=":2" /> |
The locomotive was also designed to have its boiler pressure raised from the {{Convert|225|psi|MPa|abbr=on}} on the [[GWR 4073 Class|GWR Castle Class]] to {{Convert|250|psi|MPa|abbr=on}} for the Cathedral Class.<ref name=":2">{{Harvp|Jackson|2018|p=175}}</ref> The locomotive's tractive effort was raised from {{Convert|31,625|lbf|kN|abbr=on}} on the [[GWR 4073 Class|GWR Castle Class]] to have {{Convert|40,300|lbf|kN|abbr=on}} on the Cathedral Class.<ref name=":2" /> |
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The GWR Cathedral Class was a proposed 4-6-2 "Pacific" steam locomotive design that would have been the GWR's second attempt at a 4-6-2 "Pacific" type locomotive after their very first attempt known to be The Great Bear.[1][2]
Proposal
The proposal for the GWR Cathedral Class was submitted by Frederick W. Hawksworth in 1941.[1]
Design
The GWR Cathedral Class would have featured similar features from other locomotives in the UK, such as having 4-cylinders, an all-new tender design from the GWR Hall Class and 1000 "County" Class that would come years later, same pony truck from the King Class 4-6-0s, different trailing bogie design coming from the LMS Princess Royal Class 4-6-2 Pacifics and, the same body design from the LMS Princess Royal Class 4-6-2 Pacifics but designed with the same smokebox design from the GWR Star Class.[2]
The locomotive was also designed to have its boiler pressure raised from the 225 psi (1.55 MPa) on the GWR Castle Class to 250 psi (1.7 MPa) for the Cathedral Class.[3] The locomotive's tractive effort was raised from 31,625 lbf (140.68 kN) on the GWR Castle Class to have 40,300 lbf (179 kN) on the Cathedral Class.[3]
References
- ^ a b Griffiths, Denis (1987). Locomotive engineers of the GWR. Wellingborough: Stephens. pp. 46–48. ISBN 0850598192.
- ^ a b Nock (1984), p. 51
- ^ a b Jackson (2018), p. 175
Bibliography
- Jackson, Allen (2018). Great Western Railway Stars, Castles and Kings. Crowood Press. ISBN 9781785004827.
- Nock, Oswald Stevens (1984). Tales of the Great Western Railway - Informal Recollections of a Near-lifetime's Association with the Line. David & Charles. ISBN 9780715383476.
Further reading
- Nock, Oswald (1967). The GWR Stars, Castles & Kings. Crowood Press.