Sorry about that. Each time I pressed send, the forum software chucked me into the middles of the 'Maglev' thread, and I didn't realise that my post had been made.
Admin comment If it's a duplicate post there are no objections amongst the forum staff if you just delete it yourself. Use the little cog, also available on the mobile version. If you have two threads open in different tabs of the same browser you can get the quirks you describe.
I didn't realise that that facility was available here. On most sites, if implemented, it's an option on 'edit post', but it's rarely implemented.
What the railways need is reintegration, with a single management structure controlling the service (both passengers and freight). the rolling stock and the infrastructure rather than the fragmentation into multiple units with their armies of lawyers and accountants arguing over who owes how much to whom.
From a non political point of view, the privatisation of the railways and British Telecom were done in exactly the wrong way.
If you wanted to privatise the railways, it would have been far better to use the model that was used for BT, whereby you would privatise entire railways (admittedly somewhat problematic in London if you split the railways into regions).
Telecoms, on the other hand would have benefited from using the railways model so you would have the local loop (what is now Openreach) as one independent company. Then any number of companies for equipment and trunk routing, and any number of other companies for consolidation (Bringing together elements for the equipment and infrastructure companies and billing the consumer.)
As it is, we have the worst of all possible worlds.
OK, the battery storage makes it a hybrid - indeed the ability to use an external electricity supply makes it a plug-in hybrid!
The liquid oxygen supply in Saturn V is not just for added oomph. Without it, there would be no oomph at all. Saturn V had to operate at up to 120 miles altitude. The record for an air-breathing aircraft is less than 20 miles - where the density of air is already only about 1% that at sea level.
It's not just needed at altitude; there is no way in the world that an engine breathing environmental air could burn the amount of fuel one of those things needs to burn.
In fact, the O2 is usually considered to be part of the fuel. Which is, logically, the case for all our internal combustion engines.
If anyone was not aware of the fact, if you had a laboratory filled with H2 and a Bunsen burner fed with O2, the O2 would burn in the hydrogen 'atmosphere' in a similar way to that in which hydrogen or other gaseous fuel burns in an O2 atmosphere.
I'd be surprised if there's a berthing issue at Oval on a plain line stretch of track. If there's any need to bring a train in slower so that it doesn't, for example, grab a busy set of points then this should be in the guideway data. I don't have access to the documents anymore but if you ask the SSDM or signaller next time you're at Highgate they can show you any BR and TSR restrictions applied on the SMC.
Coming up an escalator at the weekend I was noticing the content displayed on the dynamic signs mounted between the units.
There were some really helpful ones such as "step off the escalator at the end". (However did we manage before these signs?)
One interesting one was: "Do not sit on the steps".
I realised that in all the decades I have been travelling on The Underground, I have only ever seen anyone doing that once - about a year ago - and I remember at the time I thought it odd that I'd never seen it before.
Has anyone seen this (daft) behaviour on a more regular basis (or at all)?