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London & North Western Railway Society
Passenger Locomotives - Dreadnought

Shows sample photo of class, file name photos/wdrd_1.jpg

No. 643 'RAVEN' Standing next to a water column with fireman on ground operating the control lever. Single post signal on left, wall and warehouse in left distance. Manchester London Rd engine yard.




Designed by F.W. Webb, the ‘Dreadnought’ class was basically an ‘Experiment’ enlarged to produce more power. The boiler was larger, with 176 psi instead of 150 psi, and the valve gear was modified. In many ways the ‘Dreadnought’ was the first modern Webb engine. In addition to a circular smoke box door, tommy-bar screw coupling, it was the first engine to have the new 3in thick tyres made of steel.


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    Main Statistics


    Storage TypeTender
    Water Capacity1800 gallons
    Wheel Arrangement2-2-2-0
    Size Leading (2 3/4 in)3ft 71/2in
    Size Leading (2 3/4 to 3 in)3ft 9in
    Number Spokes Leading10
    Size Driving (2 3/4 in)6ft 3in
    Number Spokes Drivers18
    Size Trailing (2 3/4 in)3ft 9in
    Tender Wheel3ft 71/2in 3ft 9in
    Number of Spokes Tender10
    Wheel Base8ft 5in + 9ft 8in


    Total Wheel Base18ft 1in
    Chimney Height3ft 3ins
    Boiler Pressure175psi
    Grate Area20.5sq ft
    Number of Tubes1 242sq ft
    Heating Area1379sq ft
    CylindersThree: 14 dia (O) 30in dia (I)
    Cylinders Stroke24in
    Weight42tons 10cwt
    CMEMr. F.W. Webb
    Number Built40
    Lifespan1884-88

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