Steam Dreams 2021

The flashover can be caused by the loco proximity to earth, it can be caused by steam acting as a conductive conduit, the high pressure steam deflecting the catenary (which can be towards a bridge gantry) the steam blowing debris into a conductive path with the catenary, even (whisper it) a badly loaded tender -

As for risk from explosive expansion? Shock and surprise causing pax falling or stumbling or dropping things, debris blown into the air, paint chips rust chips and anything loose from the contact areas thrown around etc etc etc. I wouldn't want to be with three feet of a strike by whatever means and neither does network rail or the TOC's want gen public

And at that point I am off this subject.

 

Mayflower rushing through Welwyn North last night on the return leg having been held at Knebworth to let a late running Aberdeen-King's Cross Azuma overtake. Skip to 7:27!

 

I think that to be a wise decision!

 

Just how pompous can one person get.

 

I meant that continuing the discussion served no further purpose.

 

The only people who would know that are those who were on the footplate. I witnessed a flashover at Stockport in 1967, that was from safety valves blowing

 

61306 going well through Ruskington station with the returning Lincoln Christmas Market charter.

 

Ask me? I knoow nothhing.... but I must admit that my first thought when I saw this video was that the boiler was a tad full. However I wasn't there so I cannot say for certain. Flashovers do occur from time to time, and not only with steam locos. There is seldom any drama when it does happen. If the system trip out it come streight back on again. If it trips for a second time (or is it a third time?) then the juice stays off. It is clear to the Electrical Control Office that there is a problem and serious disruption ensues. I do not know of any instance when this has been caused by steam. But please do not regard me as any expert on this matter, and maybe my understanding is all wrong.

Peter

 

Isn't all this talk about flashovers from overhead wiring a red herring?

This sub-thread started (my emphasis):

Now, I'm not an expert on the modern network, but last time I checked, Winchfield was rather a long way from any overhead wires!

@Shaggy then followed up with an explanation:

In other words, the risk being mitigated is the safety valves lifting under a bridge: nothing to do with whether there are or aren't overhead wires. It's simply the risk of being caught, or startled, by the release of steam.

I'm not a risk analyst, so I'm not going to say whether that is over-reaction or not (though one wonders how people survived the previous hundred and fifty years of crossing bridges). But whatever the perceived risk that has caused the reaction, it is seemingly nothing to do with flashovers or OHLE.

Tom

 

You are spot on. The issue was with the safety valve opening under a footbridge. There was no mention of OHLE.

 

Maybe because of the risk of railway photographers who (based on recent comments) seem to know better and want to challenge or ignore instructions from safety staff?

It might boost someone's ego to challenge staff about what *they* think they can or can't do. But if the staff have been given a specific job to do (not of their own choice), then following those instructions would help everyone involved and reduce the chance of more draconian measures in the future.

 

The very similar lattice footbridge at Hook is currently being renovated and repainted, apparently in unchanged form.

 

Today's run to Oxford passing near Oddington, this afternoon. I hope you enjoy it

 

Timings for 35028 on Tuesday. https://www.realtimetrains.co.uk/se...4/0200-0159?stp=WVS&show=all&order=wtt&toc=WR
Anyone know how they're going to ensure '28 is on the front for each Victoria departure?

 

44871 Gliding up Saunderton with ease, not too much from the rear either.

 

They're not. See here:
https://www.national-preservation.c...13-14-20-22-12-21.1420082/page-2#post-2707015

 

Actually, I thought it was getting quite a shove !