Allen Hazen wrote: ↑Fri Jul 12, 2019 1:44 am Re: about E8 and E9: "Both units used the Blomberg A-1-A truck." E units (like many other things...) got heavier over their history, and (as Preston Cook pointed out in his E-unit series in "Railfan and Railroad" a few years back), later Blomberg A-1-A were more robust than earlier. (Difference in frame thickness is visible ... if you know what to look for.) I don't know whether the adoption of heavier frame trucks coincided with model change or not. And many late units ran on earlier trucks.The Pennsylvania E8As tipped the scale at 335,000 pounds, there were very few that weighed more and only by a few hundred pounds.
Just to make things even more confusing!
COTTON BELT: RUNS LIKE A BLUE STREAK