N&W Pushers on the Clinch Valley Extension
by Harry J. Dolan (Retired NS Trainmaster)
Big pusher consists (24 powered axles) were only used on loaded trains. “Time Freight” (General or Mixed Freight) pushers were limited to 14 powered axles. The former Southern pushed against cabooses, empty, and light loaded cars. As such, they limited pushers to 14 powered axles (example, two 4 axle & one 6 axle conventional units). High adhesion locomotive axles were counted as 1 1/3 conventional traction motors, hence, a C40-8 or an SD-60 with 6 actual axles would be counted as 8 axles. The N&W, on the other hand, pushed against 100 ton or heavier loads and limited their pusher consists to 24 powered axles (4 conventional SD’s or … Read more