DocJohn wrote:Besides outside appearances and different MU connections, what were other differences between H16-44s placed in service in 1951 (e.g., 594 & 596) and those placed in service in 1956 (e.g., 1611)? Did the later use GE electrica equipment instead of Westinghouse?
Going back over old entries, I noted that nobody answered the questions.
The DERS-3 series of H-16-44s (590-599) were designed for long-end-first operation and used Westinghouse electricals. They could only M.U. with each other.
The DERS-5 series (1600-1614) were designed for short-end-first and used GE electricals. They could M.U. with the DERS-4 (GP9) and DERS-6 (RS-11), and each other, plus, I suppose, with all the other engines having now-universal M.U. jumper connections (FL9, SW1200, C-425, U-25B). However, if a DERS-5 crapped out while hooked up to other engines, it would shut down the entire lot. Once isolated, the others could be restarted to continue the run.
Although the 1600-series engines lost their steam generators early on, they retained the steam pipe connections so that they could be used as second units in passenger trains.