On the subject of safety, a few years ago I attended a health & safety presentation given by the MD of the company I was working for. He mentioned...
I've been reading that the last UK coal fired power station is due to close. I'm wondering if anything is being done to preserve some of the...
You could have 3 or 4 wagons, one in use and the rest on charge and keep swapping them over.
Likewise, in most photographs I've seen, the DC overhead conductors have been quite chunky.
Mulling over this question a bit further, if you get it wrong there's a risk of a lot of hot wire falling on a platform somewhere. I don't really...
Thanks for that, I think it comes down to how much starting current a heritage EMU takes, and from the discussion above it could be quite high, if...
Thanks for the clarification, though could you please expand on "disproportionate impact"? From a technical point of view, I go to work every day...
That's logical, the power is the product of voltage and current so, for the same power, the lower voltage locomotive requires more current and...
It may well be the case. Any train actually uses more power at high speed than low speed, and it is just the inefficiency of the old-school...
Yes. Assuming we are talking about old-school DC traction motors with resistance starters, torque (tractive effort) is related to the current and...
I don't see this, the power requirement goes up as the cube of speed. At a heritage line speed of 25mph the train would take 7% of the power...
Extra Low Voltage is defined as <50V AC or <120V DC. I'm wondering a) whether 3rd rail operating at 120V DC would be considered safe (given...
This is probably a red-herring, but there can be an effect when dealing with sampled data known as "aliasing". Among other things it occasionally...
Fix It Again Tomorrow
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