We talk about the the only examples of the 2-10-10-2 locomotives ever built the Atchison, Topeka abd Santa Fe Railroad 3000 class and the Virginian Railroad class AE only the class AE proved successful and served until the 1940s and they were sadly scrapped as well as the 3000 class in 1915 they no longer exist but hopefullt they will get rebuilt 20 locomotives in total were built of the 2-10-10-2 type of steam locomotives 10 in the 3000 class and 10 in the AE class
