Editing EMD SD50 (section)

==SD50S==
The '''SD50S''' ("short frame") were prototype units built in December 1980. They were shorter than production locomotives by approximately {{convert|2|ft|m}}. There were six SD50Ss built, all of which were sold to the [[Norfolk & Western]] and eventually passed to [[Norfolk Southern]]. They were withdrawn in the early 2000s as non-standard. Two were rebuilt in 2008 as "SD40E" models by Norfolk Southern's [[Altoona Works|Juniata Shops]], along with several standard length SD50s.
[[File:NS Loco No.5443.jpg|thumb|NS 5443, an SD50]]
The SD50S designation was also used for five locomotives built by EMD Australian licensee [[Clyde Engineering]], [[Adelaide]] for [[Hamersley & Robe River railway|Hamersley Iron]].<ref>Super Series Locomotives for Hamersley Iron ''[[Network (periodical)|Network]]'' February 1981 page 27</ref> Shorter than production SD50s, they were equipped with a special double cab roof for insulation against the hot Australian desert sun in the [[Pilbara]] region. Withdrawn in November 1995, they were sold to [[National Railway Equipment Company]] and exported to the United States in February 1999 and used in national lease service.<ref>Hammersley Loco Update ''[[Railway Digest]]'' November 1998 pages 33, 36</ref> They were subsequently sold to the [[Utah Railway]] in June 2001.<ref>Here & There ''[[Australian Railway History|Australian Railway Historical Society Bulletin]]'' issue 771 January 2002 page 32</ref><ref>{{cite book|last=Oberg|first=Leon|title=Locomotives of Australia 1850s-2010s|year=2010|publisher=Rosenberg Publishing|location=Kenthurst|isbn=9781921719011|pages=390–391}}</ref> In June 2017, 6063 and 6064 were sold to the [[Chicago, Fort Wayne & Eastern Railroad]], 6064 was relocated by [[Genesee & Wyoming]] to the [[Indiana & Ohio Railway]] and renumbered 5016 and 5017.<ref>Motive Power Roundup ''[[Motive Power]]'' issue 119 September 2018 page 104</ref>