Published as a Trains magazine special edition, no. 4, 2008.EMD The improved 567C engine gave the GP9 a boost of 250 hp over its predecessor. ... The SD stands for aspecial duty, a and SD7s were initially intended for branchline service, where the six axles would spread the locomotivea#39;s weight overanbsp;...
|Title||:||The Model Railroader's Guide to Diesel Locomotives|
|Publisher||:||Kalmbach Publishing, Co. - 2009|