2005Vdub wrote:info and photos can be seen in the Contemporary Diesel Spotter's Guide 2ed edition.scharnhorst wrote:How about these odd ball units that were only built in a small number but neveer grew to anything higher in the locomotive markit? Were these just expairaments befor the next stage of locomotives came out or were they a spicific model requested by that railroad at that time?any pics of the sd40-2ss,sd45x, and f69ph-ac?? I tried railpics.net and found neither. what were the differences between a regular sd4-2 and sd40-2ss and the sd45x?
BL20-2 1 built
SD40-2SS 5 built
SD45X 7 built
SD60MAC 4 built
F69PH-AC 2 built
GM6 1 built
GM10 1 built
SD40-2SS appeared in 1978 as a test of the Super Series electrical system in 6 motor units. Burlington Northen 7049-7053 were the only such units built. The units have a larger alternator but noexternal diffrences in the locomotive. The successor to this was its wheelslip control system which was used later in the production of the "50" and "60" models (GP50, SD50, SD60 ect.)
was the pioneer of the Dash 2 modifications, especially the HT-C Truck it to rode on an SDP45 Frame. 6 were baught by Southern Pacific and were the only units to have a 4500 h.p. motor insted of the normal 3600h.p. motos found in SD45's. a 7yh SD45X remains on EMD Property as a test bed.
the F69PH-AC was a joint venture between EMD/DD and Siemens. The units used an AC Traction equipment under licensing from Siemens and used the last of the F40PHM-2 Carbodys. Both units did a tour on Amtrak in full livery befor being overhauled and sent to Germany for a test run there. Both units were in storage as of Late 1994 and remain property of EMD/DD and Siemens.