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SR Bulleid "West Country/Battle of Britain" Class 4-6-2


Class Types
SR Class WCBB

General
Designer Bulleid
Introduced 1945
Big Four Southern Railway
Wheels 4-6-2
Number Built as WCBB 110
First in Service 06/1945
Last in Service 07/1967
Manufacturers
ManufacturerTotal
Brighton Works 104
Eastleigh Works 6

Illustration
Copyright: BarkingBill
Power
Original Casing Rebuilds
Variant Introduced 1945 1957
Tractive Effort 31,000lbs 27,720lbs
Inside Cylinders 16.375" x 24" (1 off) 16.375" x 24" (1 off)
Inside Valves 10"Piston ?
Inside Motion Bulleid Chain Walschaerts
Outside Cylinders 16.375" x 24" (2 off) 16.375" x 24" (2 off)
Outside Valves 10"Piston ?
Outside Motion Bulleid Chain Walschaerts

Wheels
Original Casing Rebuilds
Pony 3' 1"
As Original Casing
Drivers 6' 2"
As Original Casing
Truck 3' 1"
As Original Casing
Locomotive Wheelbase 35' 6"
As Original Casing
Descriptive Wheelbase 6' 3" + 5' 6" + 7' 6" + 7' 3" + 9' 0" = 35' 6" (engine only)
As Original Casing

Dimensions
Original Casing Rebuilds
Length (over buffers) 67' 434"
As Original Casing
Weight (in running order) 128t 12cwt 134t 8cwt
Weight (loco only) 86t 0cwt 91t 16cwt
Adhesive Weight 56t 5cwt
As Original Casing
Maximum Axle Load 18t 15cwt
As Original Casing
Water Capacity 4,500gal
As Original Casing
Coal Capacity 5t 0cwt
As Original Casing

Boiler & Firebox
Original Casing Rebuilds
Boiler Max Diameter 6' 312"
As Original Casing
Boiler Min Diameter - tapered boiler 5' 934"
As Original Casing
Boiler Barrel Length 16' 912"
As Original Casing
Boiler Pressure 280lbs
As Original Casing
Firebox Length 6' 11"
As Original Casing
Firebox Grate Area 38.75ft2
As Original Casing
Firebox Heating Surface 253ft2
As Original Casing
Tube Number 112
As Original Casing
Tube Diameter 214"
As Original Casing
Tube Area 1121ft2
As Original Casing
Flue Elements 32
As Original Casing
Flue Diameter 514"
As Original Casing
Flue Area 748ft2
As Original Casing
Total Evaporative Area 2122ft2
As Original Casing
Superheater Element Area 545ft2
As Original Casing
Total Heating Area 2667ft2
As Original Casing