What would the TOPS numbers have been for the various Diesel Hydraulics (Westerns, Hymeks, Warships), as even though some reached the TOPS period, they never received the numbers and instead kept their cast number plates...
Er, that wasn't what I meant. In line with the original thread idea, I was wondering what the numbering of the individual locomotives in the classes would have been, not simply their overall TOPS class (these I already knew).
So, what would D7018 have been for example? 35 018? And D1014? 52 014? Or is it possible that the TOPS numbering would not have taken the pre-TOPS sequence exactly?
For starters all TOPS numbers started at 001, so I'd imagine that, for the Hymeks the numbering would have followed something like this:
D7000 == 35 001 D7100 == 35 101
However, as D7000 - D7044 and D7045 - D7100 had variations in heating equipment then perhaps they may have been split into 35/0 and 35/1 although I doubt it. In that case thought the numbering may have been something like:
TOPS numbering tended to follow the pre-TOPS sequence, but variation was dependant on locomotives being in service when numbering took place. As the initial lists for TOPS numbers were drawn up in 1967 and withrawals of the Hymeks didn't start until 1971, then I suspect that initial allocation may well have followed original sequence.