0-6-6-0

A similar wheel arrangement exists for Double Fairlie, Meyer, Kitson-Meyer and Garratt locomotives, but on these types it is referred to as 0-6-0+0-6-0 since both engine units are pivoting.

The only compound Mallets to operate in Canada were the R1 class 0-6-6-0 Vaughan design locomotives, with the cylinder ends of the engine units facing each other.

The class was owned by the Canadian Pacific Railway and served on the Big Hill in British Columbia, which had a 4.1% grade.

The Saxon Class XV HTV was a class of goods train tank steam locomotive operated by the Royal Saxon State Railways, which had been conceived for hauling trains and acting as banking engines for routes in the Ore Mountains.

[11] The first Mallet locomotive in North America was built in the United States and was of this type, the Baltimore and Ohio Railroad Class O no.

The Kansas City Southern Railway used the type as freight engines, with pilots, and had the most of them with twelve locomotives.

No. 7 Siete located at the plaza of Sagay
A 0-6-6-0 Mallet of the New York Central Railroad