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Ffestiniog Railway No. 9 “Taliesin”

Great Britain 1876 1 produced
Vulcan Foundry works photo PD

In 1876, Vulcan Foundry built a Single Fairlie locomotive for the narrow gauge Ffestiniog Railway. It was designed by G.P. Spooner and had two two-axle bogies, of which the leading one was powered. The locomotive received the number 9 and was named “Taliesin” after a 6th century Welsh poet. The driving wheels had a diameter of two feet and eight inches and the cylinders measured 9 by 14 inches. The rated haulage capacity of the locomotive was 40 tons at 14 mph on an incline of 1 in 80 or 1.25 percent. Later it was renumbered to 7.

In 1900, it was rebuilt with a new boiler and a closed cab. Additionally, the water capacity was increased from 380 to 430 gallons. Now the locomotive weighed 17 instead of 15 tons. When the new boiler had to be replaced in 1924, the railway did not grant the costs of a new boiler. So “Taliesin” was used for light work for some years and finally disassembled in 1935. Many decades later, the shops at Boston Lodge used the remains of this locomotive to build a replica and completed the work in 1999. Technically this was not a new locomotive, but a rebuild with a new boiler. Since 2011, it is being operated with a boiler pressure of 200 psi. 

Photo around 1900 with closed cab PD
The replica in September 2018 at Dinas Hefin Owen

Technical data

General

Built
1876
Manufacturers
Vulcan Foundry
Wheel arrangement
0-4-4T (Single Fairlie)
Gauge
597 mm

Dimensions and weights

Wheelbase
4.24 m
Service mass
15.2 t
Adhesion mass
10.2 t
Rigid wheelbase
1.37 m
Axle load
5.1 t
Water capacity
1,726 l
Fuel capacity
1.3 t (coal)

Boiler

Grate area
0.581 m²
Firebox surface
2.741 m²
Tube heating surface
29.079 m²
Evaporative heating surface
31.819 m²
Total heating surface
31.8 m²

Power plant

Driver diameter
813 mm
Boiler pressure
10.3 bar
Expansion type
simple expansion
Cylinders
two, 229 x 356 mm

Power

Power source
steam
Estimated power
75 kW (102 PS)
Starting effort
20.1 kN

Calculated values

Factor of adhesion
1 : 4.96
Optimal speed
23 km/h
Power-to-weight ratio
4.9 kW/t
Heating Surface Equivalent
45.5 m²
Cylinder volume/HSE
1 : 641.19
Adhesive weight/Total
1 : 1.50
Tractive force/Heating surface
1 : 13.19
Grate area/Heating surface
1 : 54.77
Firebox/Tube surface
1 : 10.61
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