Bletchleyite
Veteran Member
(iii) Others on this group have mentioned the slow speed of the single leaf door leaves. I think one way to improve this situation is to replace the pneumatic actuators with an electric actuator, that could be designed as a straight replacement for the existing actuators. Please note it is not reasonably practicable to replace the existing single door leaf with a bi-parting door arrangement. There are no door pockets for the door leaves on the D78 vehicles available in the main window bays above the bogies. To introduce one would require a very extensive rebuilding of the body shell, that would be very very expensive!!!!
You could fit plug doors. But as you say changing the actuator would help - or just put them back the way they were on the Tube! Vivarail seem to have fitted a slowing device and removed the "catching" device - just put them both back. They weren't excessively slow on LU, nor did they slam horribly like now.
I agree they should go for driver release or even full DOO (with guards still mandatory, they are needed for revenue anyway). Full DOO would save maybe 20 seconds per stop which adds up.