Recent content by Tunnel Bore

Last night trains were being flipped from platform 7 to 6 and then the next train from 6 to 7. The previous day some were moved from 6 to 5 which is a cross-platform change, but 6 to 7, and 7 to 6, are up and over the bridge. The changes were announced as the trains were running into the...

Elsewhere, the Class 700s do this well. I believe it comes from the same data that adjusts the ride height of the bogies. The more load in the carriage, the more air is needed to adjust ride height and this give a decent measure of occupancy.

When £77s and SDO were first introduced at Balcombe both platforms were restricted to 8 coach since the location was not being accurately enough picked to resolve the difference (and both platforms are reversible). IT took several months to get resolved, I think with the use of GPS repeaters or...

I was petty enough to write batch file called "lose" containing just the command "win". In 1982, on a visit to Xerox in Milton Keynes, I was shown a WIMP desktop (window, icon, mouse, pull-down-menu) and sadly had no realisation how revolutionary it was and how ubiquitous it would become. Apple...

In this context, power can only mean one thing and that is the rate at which work is done and is measured in joule/second (J/s) or watt (W or kW or MW). Tractive effort is a force at the drawbar in newton (N or kN) or a torque on a shaft in newton metre (Nm or kNm). To get the power you...

The video here Video of site during rescue has a view of some badly distorted track in the first half section - not clear whether is was cause or effect. There is though some signs of mud slide or movement in the embankments later in the video.

Years ago, Southeastern (Connex SE at the time) used to serve Redhill (and Gatwick and Three Bridges) so perhaps that gave reason to serve during disruption. It wouldn't explain East Croyden though unless you want other go back to the early days of LDCR :).

In some cases, the field winding of a DC motor is in series with the armature winding (common for traction motors), in some cases in parallel so you might only see two wires externally but if you wanted to control the motor, such as inserting starting resistances in series with the armature, or...

It's a classic bathtub curve for failure rates and you're comparing the initial period with the mid-life or near end-of-life.

I'm pleased to see this thread because I had 4 delay-repay claims rejected by GTR in February for "Invalid Ticket" which after some faffing about turned out to be because I wasn't tapped in. Typically I catch 07:25 ThamesLink from Balcombe but I (like most people) check the trains on line before...

I change there on my regular commute from Balcombe to Victoria. It's not perfect but it is a good place to change: more stairs and escalators than Three Bridges or East Croydon and boarding trains at Croydon means getting on an already busy service. It also means I can change on to GatEx which I...

Kuala Lumpur Sentral

I agree strongly that the service recovery plans are poor, even counterproductive. Making trains skip stops in the peak flow direction so that they are on time for a lightly load counter flow return is senseless. Tipping people out when terminating short causes further delay and bags of...

I'm almost there figuring out the ways to change between platforms for the various versions of my commute. There are two pairs of escalators between the new concourse and 5&6. The northern pair are both up. The southern pair are one up and one down. There is also a set of stairs between the...

We need to remember the difference between power and tractive effort (or torque). While accelerating there is a large torque developed by the traction motors and large current in the motors but that is fed via some power electronics (inverter etc) which draws a different current from the supply...