D&RGW SD9 Loco Add-On

As one of the most unique and iconic six axle heavy yard switchers, the EMD SD9 was a popular locomotive among North American railfans, despite its short working life.

The EMD SD9 was a 1,750hp six-axle (C-C) diesel road-switcher powered by EMDs highly successful two-stroke 567C V-16 diesel power plant. In total there were 471 SD9s built by Electro-Motive between 1954 and 1959 and was the immediate successor of the very similar, 1,500hp SD7, introduced in 1952.

In basic terms, the SD9 was a lengthened GP9 with six axles rather than the GP9’s four axles. ‘SD’ stood for ‘Speci...