These very interesting posts began with the premise that doubleheading was only
a steam loco phenomena but we need to remember many early diesels did NOT M.U.
I personally do not know of CB&Q diesels being doubleheaded that were not MU'ed
but there is a lot of literature about the Milw using 3 & 4 non-MU'ed SW-1's,
each with it's own crew, to operate across southern Minnesota (a line with
light bridges that would not handle road units). They followed the same
procedures that have been cited in the posts here.
As for communications with even a singe engine, well into the 70's, BN on ex-Q
trackage had crews that relied heavily on lantern & whistle signals to
communicate because they did not have radios (the Aurora-West Chicago line
being an example) Check any CB&Q Rule Book (or other RR's for that matter as
the signals were uniform) for all the actions that could be initated by certain
lantern motions or series of whistle blasts. It's a lost art but I am sure
there are times today when a crew with b/o radios wish the newbies could truly
"communicate". Gerald
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