And magnesium and manganese.with more than a dollop of silicon I read... and excellent corrosion resistance...
In particular excellent chlorine corrosion resistance e.g. Aluminium boat hulls...
And magnesium and manganese.with more than a dollop of silicon I read... and excellent corrosion resistance...
Pardon my ignorance, but does this 'beat' the March target that was stated for the tunnel to go live? I note that it is subject to a speed restriction of 75mph through the tunnel "until additional testing in accordance with ENE TSI clause 6.2.4.5 is carried out" - presumably that is what is scheduled to be completed by March, but it is theoretically completely usable now?
the ORR letter holds out hope of it getting raised...And the linespeed through the tunnel is 75mph max anyway?
One does wonder, if cost were no issue, what would be the best material for the various ole wires for difficult, corrosive environments; Gold + Titanium/Tungsten maybe?
The friction issues with gold /silver might be interestingIn terms of conductivity the dogs bollocks is gold followed closely by silver and then copper. They are all magnificent with corrosion too though copper does pit. Gold and silver are too expensive and too ductile and soft. Copper is thus the usual material of choice. It is why virtually all house wiring is copper. When space is available aluminum is pretty darned good. The transmission grid is Al on steel formers because there is so much space and has better tensile strength for the long spans.
Err yep absolutelyThe friction issues with gold /silver might be interesting
Not due to start until Monday on electric power.For info, departed Cardiff on 12.19 to London on diesel.
Electric services are starting on Monday 6 January at the earliest according to Network Rail Wales & Borders Twitter feed.For info, departed Cardiff on 12.19 to London on diesel.
And the linespeed through the tunnel is 75mph max anyway?
but hes got a letout if we get stuck with a mere 75mph... (as bad as the Lickey…)Can't help but notice Martin's been very quiet since that announcement.
but hes got a letout if we get stuck with a mere 75mph... (as bad as the Lickey…)
No, Martin was quite unequivocal that the tunnel will remain diesel only permanently. 75mph electric is not Diesel only.
See https://twitter.com/25kV/status/1213892156114509824?s=19Entered Severn tunnel eastbound on electric. Diesel traction engaged about 90 seconds in.
Remained on diesel to just past Pilning station and switched back to electric.
on twitter GWR's 1L34 08:50 Cardiff to Paddington was electric all the way formed of 800.031, today!
Further confirmation that the tunnel is live, just not yet in use:-
Now I'm getting confused! If it was electric "all the way" it would have been electric through the tunnel which is "not yet in use".
Current briefs to train crew are still changeover at Pilning and West of Severn Tunnel Junction.
That will do for me - thanks.
On 1L09 and can confirm electric from Cardiff, diesel through the tunnel, electric again from roughly the point the up and down lines start to split east of Pilning.I can confirm 1L07 will be in electric from Cardiff this morning - but will be switching to diesel at Severn Tunnel Jn and back to electric at Pilning.