In 1947, the second District line train of the day left Upminster westbound at 05:12 and was due to reach Earls Court at 06:21, 69 minutes later.
Several types of stock later, leaving Upminster on the latest timetable at 05:19 the train gets to Earls Court at 06:27, 68 minutes later.
The first page of the 1947 timetable is at timetableworld.com in the LMS section.
Not the rolling stocks' fault though. R stock and D78 stock both had further weak field performance steps built in but never enabled. The signalling system was never upgraded to permit use of faster speeds and run times. Until now of course with the SSR ATC being implemented. Still a year or more to go before there is enough commissioned to get timetabled journey time improvements UPM - ECT.
Weak field was used on the D stock if the driver used it was another matter though of course only in open sections, usually the coasting flag was used more and more
Ah, but there were two further stages of field weakening never enabled for service operation. These were intended for a resignalling that never happened. On a D78 test train on the north end of the Met line I believe something close to 70mi/h was attained. They were intended to get towards 60mi/h on the level if that signalling scheme had gone ahead. Indeed the rheostatic brake was rated to operate from 55mi/h downwards.
Ive seen one go from Upminster to Barking Sidings in the days when the last westbound was an empty and not really slowing down for station starters got to 60mph as indicated on the speedo. Now these were never accurate at the best of times as proven when on failure investigations on tripping of policeman trainstops aka Moorgate Control so i would say more nearer to 55mph.
Of course this was both flags up Weak Field and Coasting Control and the motors screaming between Elm Park and Dagenham East
I seem to recall theory backs up that sort of speed with both flags up. The difference between FS1 performance as you describe and the full FS3 performance was quite something above about 20mi/h. On test, it would still be noticeably accelerating up hills that the speed would normally balance out on, such as Hammersmith to Ravenscourt Park - which is supposed to be flag down of course.
When D Stock were first introduced the weak-field and coasting control cut-in speeds were higher than in later years. Both flags down was 40mph. Unit 7502-7503 remained set at the higher speed for sometime afterwards, having been a test unit during D Stock introduction.
Last Edit: Sept 24, 2019 6:45:56 GMT by Dstock7080
With "proper" stock the last WB from Upminster was the Putney Bridge staff train, worked by a PG crew, arriving at Putney Bridge at about 0120 where it would reverse on the bridge. the guard usually had a go from Upminster to Putney, depending on the crew. The R stock and cPs could get a decent speed from Upminster depending on whetehr we saw a red handlamp on the paltform or not, that signifying a staff member wanted the train.
We then had to wait at Whitechapel! Happy days. we never really knew how fat they went as the speedos were very unreliable. You knew you were going fast when the liquid ran out of the top of the tube.