They were the most powerful locomotives in Australia at the time and the heaviest non-articulated locomotives yet built in the United Kingdom .
Armstrong Whitworth built ten 500 class 4 - 8 - 2 locomotives for the South Australian Railways in 1926 .
Armstrong Whitworth were the most powerful locomotives in Australia at the time and the heaviest non-articulated locomotives yet built in the United Kingdom .
Armstrong Whitworth built ten 500 class 4 - 8 - 2 locomotives for the South Australian Railways in 1926 .