On 15 July, 21:06, wrote:
In article ,





(Paul Terry) wrote:
In message , Clive
writes

Epping to Ongar was a normal 62 stock single four car unit in the late
sixties, both of the intermediate stations were still open. *I believe
that a single unit was used because the line was single end feed from
Epping and a dual unit eight car train would have caused too great a
voltage drop at Ongar.

I think that was the normal pattern, but I believe two such units
were used for the peak service (and for the North Weald air show)
until about 1975. However, ISTR that when two units were in service
there were special regulations about them not starting out together
from the crossing point at North Weald, because of the voltage drop
you mention.

Exactly. I think there was an interlocking on the North Weald signals that
prevented both starters being pulled off at once. One train only on the
branch was one of the cuts nearer to closure.

--
Colin Rosenstiel

And another oddity; just as the 1967 stock on the Hainault - Woodford
always seemed to be taken from the later batch (no doubt delivered
continuously) for the Brixton extension, the 1962 stock on the Epping
- Ongar was only ever selected from the units with de-icing equipment,
at every time of year.

Again, if anyone has any counterobservations I'd be interested.