Then you are wrong. Especially near trees. Mind you in the last 20 years they have cut nearly all the trees back near thenm round here, which has helped, but gales still cause brownouts
Neither do teh 275Kv ones, Ive seen birds on those.
I don't think that is correct either. There isn't much sag before melting on a hot wire.
In reality losses get too great at high currents - I²R etc etc.
Quite, and all the resources doing so would use and the pollution it would create.
Because there is no need to. ;-)
Yup, amazing (to us). 'Perfectly natural' to them, with what they were born with.
Boom! ;-)
Yup, 'human technology', not 'humans'. A human wouldn't even win on raw strength against a chimp.
Nor would we with on speed or memory:
The reason some seem to miss just how pathetic we are (in a 'nature / survival POV') also think we are at the top of the tree and so therefore can do what we like with anything else (except as we evolve ourselves and realise we also rely on these creatures for our own survival (and not food) that's slowly that's changing of course).
e.g.
Cheers, T i m
Yes there is. I spent most of my childhood on the farm behind where I lived and there were a number of ?132Kv pylon routes passing through their fields and on a hot August day it was very noticible that the wires were closer the ground than in winter.
It isn't really "control", though. Like swarms of fish they are just following a simple algorithm that says keep close to the next bird(s), but far enough away to take avoiding action if they get too close. They end up in a very ordered array with almost crystalline spacing, which is why you see the sudden dark bands depending on your alignment.
It's only the perturbations when the edge gets close to an obstacle like a tree or the ground that generate the illusion of overall control. You see the same thing in 2d on skating rinks, just not with the same numbers. You might have substantial numbers of vehicles on a busy multi-lane motorway, but then that's (almost) 1d.
Not really.
Many of the distribution single phase wires in villages start out with insulation on them but after a few decades it perishes and hangs down in strips arcing and sparking in the rain when it touches another phase. Sometimes it was bad enough to trip out the circuit breaker.
Ours used to be like that before they replaced it with the modern composite aluminium cable with the internal steel hawser.
The cables in question are carrying 11Kv, not 230V and have been there for decades. Insulated wires would be too heavy for the existing poles and supports. Why would they bother, especuially when only 50 houses are supplied ?.
I don?t know all boards did it but SWEB which covered the area where I grew had insulation on some
11Kv cables where they crossed roads,maybe 33Kv ones as well but I didn?t pass under any of those while cycling to school. That would be mid to late 1960?s and I can remember when a new line was installed the plastic insulation stood out because it was green covered. Also at that time a lot of the pylons of the original 132kv grid.used to have a safety net of wires where the lines crossed a road or railway ,that died out some time ago possibly some of that network was transferred from the CEGB to the regional boards, occasionally you still see the brackets for them on and old pylon like this one .
Nets were used when cables were being replaced
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