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Though not technically a demonstrator, but rather an EMD testbed locomotive, EMDX 462, which was an F9A carbody, showed up extensively on the Q in the mid- to late-1960's. According to rrpicturearchives.com (RRPA): "Number 462 was built in December 1949 as C&NW F7 6501A (c/n 8580) on EMD Order E1188, was retired by the C&NW on January 7, 1959 and traded back to EMD. It was rebuilt during May 1960 into a F9A (new c/n, 26158, note there appears to be two builders plates) on EMD Order E1188-A33R and used as a test unit for newly developed components." 462 was originally painted in a maroon and orange scheme and there are photos of it in Savanna on Jan Kohl's Castle Graphics website. Also Chuck Zeiler photos of the unit at Clyde in 1965 can be found on RRPA. By 1968 it was repainted into EMD blue. Here is a link to it at Savanna in 1968: http://www.colours.rrpicturearchives.net/showPicture.aspx?id=1355858 So while it did not result in any sales of new F-units, it certainly paved the way for the EMD 645 poweredGP40's that the CB&Q eventually bought. I would bet the GP40 prototypes also tested on the Q. I need to check for photo evidence of that, though. Maybe Bill Barber remembers something? Tom Mack Cincinnati, OH ---In CBQ@yahoogroups.com, <mwoodruff54@...> wrote : The 5579 was most likely EMDX 5579, their SD24 demonstrator (EMD order #5579, EMD serial #24701, blt 7/58) which was later sold to the UP as their 448. msw largofl
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