7200 Facts & Figures

Boiler class	Swindon standard 4
Working pressure	200 lbs psi
Barrel (outside diam front)	4' 11"
Barrel (outside diam rear)	5' 6"
Length between tube plates	11'
Tubes (Superheater units no 14)	6 tubes 1" diameter
Tubes (Superheater units no 14)	4 tubes 1¼" diameter
Length of tubes	11'
Large tubes no 14	5⁵/₈"
Small tubes	235 1⁵/₈" diameter
Heating surface tubes	1350 sq ft
Superheating surface area	192 sq ft
Total heating surface	6 tubes 1659 sq ft
Total heating surface	4 tubes 1615 sq ft
Firebox outside measurements	7' x 5' 9" / 4' 0"
Firebox inside measurements	6' 2½" x 4' 8½" x 3' 2¾"
Grate incline to front	10º
Grate area	20.56 sq ft
Heating surface	129 sq ft
Cylinders (2)	19" diameter
Piston stroke	30"
Cylinder centre to 1st coupled	5'
Adhesion weight	73 tons
Engine weight full	92 tons 12 cwt
Engine weight empty	73 tons 11 cwt
Wheel diam coupled	4' 7½"
Wheel diam front pony	3' 2"
Wheel diam rear trailing	3' 8"
Axle weight front pony	9 tons 7 cwt
Axle weight first coupled	18 tons 14 cwt
Axle weight second coupled	18 tons 10 cwt
Axle weight third coupled	17 tons 1 8cwt
Axle weight rear coupled	17 tons 13 cwt
Axle weight rear trailing	10 tons 10 cwt
Outside engine overall length	44' 10"
Height to smokebox centre	8' 2"
Height to cab roof centre	12' 10"
Water tank capacity	2500 gallons
Coal capacity	6 tons
Minimum curve	6 chains normal; 5 chains slow
Maximum speed	30-35mph