tag:blogger.com,1999:blog-7577633936396294153.post7300478400483652478..comments2024-03-29T05:00:50.812-05:00Comments on Industrial History: Cow and Calf (Railroad)Dennis DeBrulerhttp://www.blogger.com/profile/13992361354510209661noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7577633936396294153.post-16961994496312052382023-08-17T00:51:45.657-05:002023-08-17T00:51:45.657-05:00I have always found the EMD TR units interesting. ...I have always found the EMD TR units interesting. Unfortunately, I don't think any original sets have survived. A TR2B has been preserved along with an NW2 that wasn't originally a "Cow." That BRC set that worked in Minnesota was scrapped.<br /><br />I think the IHB calfs were built from regular NW2s and SW7s.<br /><br />I have always found the evolution of the BRC's EMD switchers to be an interesting indicator of the practicality of such units. I do belive they originally ordered TR2 and TR4 (NW2 and SW7) sets which were connected by drawbars.(eventually being converted to use regular couplers. Then in 1951 they ordered 2 pairs of SW9s instead of TR5s(SW9 based cow-calfs) with MU plugs only on the cab ends and no MU hoses. Then finally they ordered 4 SW1200s with full MU capability on each end.Franklin R Campbellnoreply@blogger.com