Rapido 50623 HO Scale EMD SD9 Diesel Burlington CB&Q White Frame 834 with DCC & Sound N EL these locomotives shared many details

these locomotives shared many details with the slightly more modern SW7

these units were dependent upon a “mother” unit

From this initial developmental work

kestrels perch on wires or poles

Rapido 50623 HO Scale EMD SD9 Diesel Burlington CB&Q White Frame 834 with DCC & Sound N EL these locomotives shared many detailsRapido 50623 HO Scale EMD SD9 Diesel Burlington CB&Q White Frame 834 with DCC & Sound The SD7 was General Motors Electro Motive Divisions first foray into 6 axle power. The SD stood for Special Duty, while the 7 was carried over for the 4 axle GP7 series. This new series of locomotives provided extra tractive effort spread and weight distribution across the six axle trucks. Production lasted from May of 1951 to November of 1953. A total of 188 units