South African Class 3A 4-8-2
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The South African Railways Class 3A 4-8-2 of 1910 was a steam locomotive from the pre-Union era in the Colony of Natal.
NGR Class B no. 335, SAR Class 3A no. 1476
Cole type superheater header
Walschaerts valve gear
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The Walschaerts valve gear, known as Heusinger valve gear in parts of Europe, is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railwa
A set of Walschaerts valve gear on 60163 Tornado. Note that the radius bar is set to reverse.
Swindon, Marlborough and Andover Railway Single Fairlie 0-4-4T of 1878. This was the first British locomotive to be fitted with Walschaerts valve gear
The Walschaerts valve gear on a Pennsylvania Railroad E6s