6023 Nameplate  King Edward II Project  6023 Nameplate

       The restoration of a single chimney Great Western Railway King locomotive from scrap yard condition

Specifications of GWR 4 Cylinder 4-6-0s

 

  Star class Castle class King Class
Built at Swindon 1906-1923 1923-1950 1927-1930
Number built 73 171 30
Wheel arrangement 4-6-0 4-6-0 4-6-0
Weight of engine (full) 75tons 12cwt 79tons 17cwt 89tons 0cwt
Weight of tender (full) 46tons 14cwt 46tons 14cwt 46tons 14cwt
Driving wheel diameter 6' 8½" 6' 8½" 6ft 6in
Bogie wheel diameter 3'2" 3'2" 3'0"
Valve gear Inside Walschaerts Inside Walschaerts Inside Walschaerts
Boiler barrel length 14'10" 14'10" 16'0"
Boiler diameter 4'1013/16" 5'115/16" 5'61/4"
Boiler outside diameter 5'6" 5'9" 6'0"
Firebox length (outside) 9'0" 10'0" 11'6"
Heating surface 2,104 sq ft 2,312 sq ft 2,490 sq ft
Grate area 27.07 sq ft 29.36 sq ft 34.3sq ft
Boiler pressure 225lb/psi 225lb/psi 250lb/psi
Cylinders (4) Bore x Stroke 15" x 26" 16" x 26" 16¼" x 28"
Water capacity 4,000 gallons 4,000 gallons 4,000 gallons
Tractive effort at 85% boiler pressure 27,800lbs 31,625lbs 40,300lbs