Post by d7666 on Mar 13, 2018 18:20:30 GMT
Specific to the post-1971 situation and 7car trains:
I've tried to understand this from research, but sources are ambiguous, and while I have read most of Piers Connor's major District Line item that appeared in LURS I don't have every chapter.
I know the 7car trains were formed when attaching / detaching sections in traffic ended. But most sources seem to use the word 'permanent' 7car formation to explain this. Now does this mean what I think it means - that 7car trains were permanent in traffic for a traffic day or period not uncoupling, but could still be reshuffled for engineering needs at night, and not actually in fully fixed long term permanent formations ? It is the word permanent I am finding ambiguous.
I know there were certain dis-allowed CO/CP permutations related to guards positions, but, after allowing for that, did they freely mix and match 3+2+2 combinations (subject to A and D ends)?
Likewise R stock, were the 5+2 and 3+3 units also freely mixed and matched outside of traffic ?
Reason I am asking is some notes from a handful of travels in 1977 / 1978 are a bit imprecise!
Traction motors:
R stock new had LT111 motors and as far as I can determine all three of BTH MV and CP supplied some. Is it known how many were supplied by which maker? Were these kept in specific groups to a car, to a unit, etc or were they in a single pool, considered identical, and over time any car/unit/train could have any maker's motor anywhere?
O/P stock - what motors did they have and supplied by who ? Same question as R, over time were they pooled and mixed up ? I assume the original Metadyne sets had MV motors since MV supplied the metadyne kit, but the rest ?
--
Nick
I've tried to understand this from research, but sources are ambiguous, and while I have read most of Piers Connor's major District Line item that appeared in LURS I don't have every chapter.
I know the 7car trains were formed when attaching / detaching sections in traffic ended. But most sources seem to use the word 'permanent' 7car formation to explain this. Now does this mean what I think it means - that 7car trains were permanent in traffic for a traffic day or period not uncoupling, but could still be reshuffled for engineering needs at night, and not actually in fully fixed long term permanent formations ? It is the word permanent I am finding ambiguous.
I know there were certain dis-allowed CO/CP permutations related to guards positions, but, after allowing for that, did they freely mix and match 3+2+2 combinations (subject to A and D ends)?
Likewise R stock, were the 5+2 and 3+3 units also freely mixed and matched outside of traffic ?
Reason I am asking is some notes from a handful of travels in 1977 / 1978 are a bit imprecise!
Traction motors:
R stock new had LT111 motors and as far as I can determine all three of BTH MV and CP supplied some. Is it known how many were supplied by which maker? Were these kept in specific groups to a car, to a unit, etc or were they in a single pool, considered identical, and over time any car/unit/train could have any maker's motor anywhere?
O/P stock - what motors did they have and supplied by who ? Same question as R, over time were they pooled and mixed up ? I assume the original Metadyne sets had MV motors since MV supplied the metadyne kit, but the rest ?
--
Nick