Specification

Tornado GA by Gordon Best
ITEM Imperial Metric
Wheel Arrangement 4-6-2 2-3-1
Length over buffers (including tender) 72′ 11 3/4″ 22.22 m
Maximum Height 13′ 1″ 3.99 m
Maximum Width (over cab side screens) 9′ 2 7/8″ 2.82 m
Total locomtive and tender weight (full) 166 tons 2 cwt 168.8 tonnes
Weight of locomotive only (full) 105 tons 4 cwt 106.9 tonnes
Adhesive weight (full boiler) 66 tons 11 cwt 67.7 tonnes
Maximum axle load 22 tons 7 cwt 22.7 tonnes
Boiler pressure (maximum) 250 lb/sq in 17.25 Bar
Nominal tractive effort @ 85% boiler pressure 37,397 lb 166.38 kN
Maximum speed 100 mph 160 km/hr
Diameter of driving wheels 6′ 8″ 2.03 m
Diameter of bogie wheels 3′ 2″ 0.97 m
Diameter of trailing carrying wheels 3′ 8″ 1.12 m
Cylinders 3 3
Piston stroke 26″ 0.66 m
Piston diameter 19″ 0.48 m
Valves Inside admission piston type .
Valve diameter 10″ 0.25 m
Valve gear Walschaerts (3 sets) .
Exhaust system Double choke Kylala Chapelon (Kylchap) .
Axle bearings Timken taper roller throughout .
BOILER . .
Type Diagram 118 .
Maximum diameter 6′ 5″ 1.96 m
Overall length 29′ 2″ 8.89 m
Distance between tube plates 16′ 11 5/8″ 5.17 m
Heating surface (firebox) 245.30 sq ft 22.79 m2
Heating surface (small tubes) 1211.57 sq ft 112.56 m2
Heating surface (superheater flue tubes) 1004.50 sq ft 93.32 m2
Total evaporative heating surfaces 2461.37 sq ft 228.67 m2
Superheater heating surface 697.67 sq ft 64.14 m2
Grand total heating surface 3141.04 sq ft 291.81 m2
Firebox Wide (Wooton) type with combustion chamber .
Grate area 50 sq ft 4.65 m2
Grate type Rocking with hopper ashpan .
Small tubes 121 x 2 1/4″ D 57.2 mm D
Superheater flues 43 x 5 1/4″ D 133,4 mm D
Superheater elements 43 x 4 pass elements .
TENDER . .
Coal capacity 9 tons 9.14 tonnes
Water capacity 5,000 gallons 22700 litres
Weight (full) 60 tons 18 cwt 61.87 tonnes
Wheel arrangement 8 wheels rigid frame .
Wheel diameter 4′ 2″ 1.27 m

Data courtesy Locomotives of the LNER Part 2A, published by the RCTS, 1986

Locomotives 60153-7 were fitted by Timken roller bearings and were hence slightly heavier. These had a total weight of 155 tons 2 cwt, and maximum axle load of 22 tons 7cwt.

Tornado carries 7.5 tons of coal and has a water capacity of 6,200 gallons.

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