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Post by silverdragon on Feb 24, 2018 9:41:46 GMT
Jump the bumper and Downed power lines.
The Symdavers got a beating there. Yeah, Hard to watch, even if they are just dummies...
Although it was very graphic at 40mph, inner city, traffic is more likely to be doing 30mph, and there are spaces on urban roads where we suggest a 20mph because of mass pedestrians and kids.
If ever there is a re-do, I would like to see the comparison of damage to speed for lower speeds.
However, the side-on slow motion shots of having your legs extended forwards whilst you stay still.. rather graphic, but, very educational?.
I am of a mind to suggest that these should be shown to kids learning road safety, as a graphic aid to help them understand the risks.
So would I jump??. Damn right I would, but then again, I may be more likely to try to take a dive sideways....
Which brings me on to a request for a re-do?.
IF, and its a big if, if you have time to react, what would be better, jump up and try to clear the bonnet, or dive sideways and try to miss the whole car?.
On to the downed electrical pole....
And this is why we here in UK dont have as many roadside electrical poles, or as few as we can get away with.
"I did not know that"... the field around the downed wire that could electrocute you just by walking on it if you take too big a step?.
That had never crossed my mind, the whole thing was completely new to my knowledge, I learned a lot today, so that was a good day just for that.
That is, I knew that you should not try to exit the vehicle, and that there would be a chance of electrocution if you stepped on the ground around the downed line, but the difference between 10ft and 11 ft "would be enough to kill you if you have one foot in both distances" thing...
So I have a new question.
You have a downed power line, and a vehicle fire.
Your escape is therefore time sensitive. Fuel is leaking, fire will get to it quickly.
Whats better, a fast shuffle, or a series of jumps landing both feet together of course in the same way you exit the vehicle?.
Which would make a faster escape.
Would a series of jumps be plausible.
I am going to make a guess here that the series of jumps may be a bit faster if plausible...
In general of the whole show?.
This was one of the better ones of the series, being that it dealt with EVERY day, day to day risks, and has been an education in those areas, and for that reason, well worth the watch.
Not that that diminishes in any way what has been done previous, more a case of excellent work already, but this one just raised the bar just a little bit more?.
And nice to see old faces doing cameo's as the series progresses.
Keep at it Lads, and can we have more Dog in the show?. There MUST be more myths about the family pet that Bo can make a cameo in.
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Post by silverdragon on Feb 24, 2018 9:45:20 GMT
Another question, Parkour, the art of running jumping over obstacles, if you have that skill set, could anyone manage a jump over a moving vehicle and land safely behind?.
I am just going to say that if the answer is the shows insurance is going to have a dicky fit at even THINKING of putting a real person in front of a moving vehicle at 40mph, I dont blame them at all?.
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Post by ironhold on Feb 24, 2018 10:24:25 GMT
Uhh... we had a new episode?
The listings for here in the US had re-runs last night unless something new got snuck past.
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Post by the light works on Feb 24, 2018 12:27:43 GMT
I also have not seen that on my DVR. and I specifically looked thursday night.
as for the parkourist jumping over a car, yeah, it's been done. on live TV. do not try this at home.
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Post by the light works on Feb 24, 2018 12:32:26 GMT
as for the power line, whether to shuffle with your feet never getting any distance apart, or to hop with your feet together, the answer is yes.
the mechanics, if they didn't say it, is you have 7000 or more volts trying to find the lowest impedance route back to the power station. at that voltge, the dielectric of your shoes breaks down, and the impedance of a sack of salt water is lower than the impedance of a bunch of dirt, even if the sack of salt water is a six feet longer route.
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Post by ironhold on Feb 24, 2018 18:47:25 GMT
I just checked iTunes, and the newest episode I'm seeing is the "backseat driver" episode from the 7th.
If there was a new episode, it just straight didn't get a US release.
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Post by ponytail61 on Feb 24, 2018 20:20:56 GMT
Next episode is 2/28 and should be the one seen in UK. I guess they did like every other show here and took a break for the Olympics.
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Post by the light works on Feb 24, 2018 23:34:21 GMT
Next episode is 2/28 and should be the one seen in UK. I guess they did like every other show here and took a break for the Olympics. that makes sense, I guess. |
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Post by Cybermortis on Feb 25, 2018 1:14:36 GMT
Electrical power lines tend to run in as straight a line as possible to reduce the amount of power that is lost. This is especially important in the US as the distance between power stations and the places they serve will be considerably higher than in the UK.
In the US roads tend to run directly between point A and point B with little or no deviation, where as in the UK roads tend to twist and turn far more than their American couterparts; mainly due to them having existed for at least 2000 years.
Thus when you want to run powerlines in the US chances are that the most direct path, and the one that's cheapest and easiest to build on, will correspond to the roads. Where as in the UK the most direct route is likely to be everywhere but along the roads.
There are exceptions of course, I know some villages in Yorkshire have overhead electrical powerlines that run along the roads. One lost power some 10 years ago when a drunk driver crashed into one at speed.
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Post by GTCGreg on Feb 25, 2018 1:59:32 GMT
On most power poles in the US, you will find 12,000 Volt distribution lines. Unless the power is underground, and most isn't, you find many power lines running along the roads just because that's where the houses are located. The voltage to the individual houses is provided by 120/240 Volt transformers, but the 12kV lines are still on the poles to feed the transformers. Power from generating plants to sub-stations is at a much higher voltage,typically 186,000 Volts. These lines are normally not run alongside roads but they could be in some cases.
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Post by ironhold on Feb 25, 2018 2:02:33 GMT
Here in the US, you'll also see lines running along railroad tracks.
But even then though, you'll still have lines running through the countryside in places. There's actually a large swath through a residential area in town where there are no houses because of the lines running through. The roads go through underneath, and one large section is home to a park (complete with playground equipment), but no houses underneath.
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Post by GTCGreg on Feb 25, 2018 2:13:53 GMT
Here in the US, you'll also see lines running along railroad tracks. But even then though, you'll still have lines running through the countryside in places. There's actually a large swath through a residential area in town where there are no houses because of the lines running through. The roads go through underneath, and one large section is home to a park (complete with playground equipment), but no houses underneath. The lines running along RR tracks are usually the signaling lines used by the RR and are generally not high voltage although sometimes power lines do share the RR right of way. Of course, electric locomotives do have high voltage overhead lines but we really don't have that many in the US compared to Europe. |
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Post by the light works on Feb 25, 2018 3:11:05 GMT
On most power poles in the US, you will find 12,000 Volt distribution lines. Unless the power is underground, and most isn't, you find many power lines running along the roads just because that's where the houses are located. The voltage to the individual houses is provided by 120/240 Volt transformers, but the 12kV lines are still on the poles to feed the transformers. Power from generating plants to sub-stations is at a much higher voltage,typically 186,000 Volts. These lines are normally not run alongside roads but they could be in some cases. actually, distribution voltage varies between 7KV and up to, I think, 30KV. my local power company runs two different distribution voltages depending on load and distance - I remember one is 7KV, and forget the higher one. - and my electrical safety awareness class is on the other computer, and I'm not currently deeming it important enough to look up the exact number. my town also has a couple of transmission line branches that parallel a road, for a distance. - but normally, they own their own right of way, away from roads. they put power lines underground to keep people from hitting them, so people hit the transformers, instead. |
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Post by the light works on Feb 25, 2018 3:16:04 GMT
Here in the US, you'll also see lines running along railroad tracks. But even then though, you'll still have lines running through the countryside in places. There's actually a large swath through a residential area in town where there are no houses because of the lines running through. The roads go through underneath, and one large section is home to a park (complete with playground equipment), but no houses underneath. The lines running along RR tracks are usually the signaling lines used by the RR and are generally not high voltage although sometimes power lines do share the RR right of way. Of course, electric locomotives do have high voltage overhead lines but we really don't have that many in the US compared to Europe. having a power right of way paralleling a railroad right of way does have a certain logic. they both tend to like straight lines. but yeah, the short poles with multiple lines are usually communications and signal lines for the railroad. |
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Post by ironhold on Feb 25, 2018 3:23:26 GMT
I remembered something.
The original 1980s G. I. Joe (re: Action Force) had randomized "public safety announcements" at the end of each episode. Each PSA involved one or more of the good guys giving a life lesson to a group of kids who were doing something wrong. They weren't the greatest (a few in particular have been the subject of parody and commentary), but they were a thing.
This link should take you to the 11:42 second of the compilation here, which deals with downed electrical lines:
In it, a pair of kids debate trying to jump a downed electrical line on their bikes. They're stopped by team heavy machine gunner Roadblock (one of two Joes to appear in two different PSAs), who lectures them about how dangerous it is.
...Before grabbing a pair of long-handled pruning shears from the back of his vehicle. He uses the shears to pick up the length of downed electrical line, and casually tosses it off the road.
So... yeah.
Possible revisit fodder?
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Post by silverdragon on Feb 25, 2018 7:44:23 GMT
as for the power line, whether to shuffle with your feet never getting any distance apart, or to hop with your feet together, the answer is yes. the mechanics, if they didn't say it, is you have 7000 or more volts trying to find the lowest impedance route back to the power station. at that voltge, the dielectric of your shoes breaks down, and the impedance of a sack of salt water is lower than the impedance of a bunch of dirt, even if the sack of salt water is a six feet longer route. What difference a pair of thick soled rubber boots?. Safety boot workwear?.. maybe even the boots you use for the firefighting job?. I have used thick sole rubber boots for work for many years, wold they make the difference?. Chances of just picking up a piece of THICK power line and being able to move it by hand?.. And then, pruning sheers?.. I am presuming a set of LONG WOODen handles?. |
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Post by the light works on Feb 25, 2018 15:00:38 GMT
as for the power line, whether to shuffle with your feet never getting any distance apart, or to hop with your feet together, the answer is yes. the mechanics, if they didn't say it, is you have 7000 or more volts trying to find the lowest impedance route back to the power station. at that voltge, the dielectric of your shoes breaks down, and the impedance of a sack of salt water is lower than the impedance of a bunch of dirt, even if the sack of salt water is a six feet longer route. What difference a pair of thick soled rubber boots?. Safety boot workwear?.. maybe even the boots you use for the firefighting job?. I have used thick sole rubber boots for work for many years, wold they make the difference?. Chances of just picking up a piece of THICK power line and being able to move it by hand?.. And then, pruning sheers?.. I am presuming a set of LONG WOODen handles?. not much at that voltage. any time a power company worker manipulates something connected to the high side of the system, he uses a CLEAN DRY nonconductive ten foot pole, or works from a bucket truck that has an insulated boom, or both. to give you an idea of what we are working with, here, my backup safety system if I am in a possible downed wire environment is my non contact voltage sensor - it goes off bout ten feet from a live power line - compared to about an inch from a household voltage line. one of the more common issues we get is that salt mist from the ocean coats the insulators, and you can then see a coronal discharge as the power arcs across the salt. the power company periodically has contractors wash down the insulators to minimize this. they use a broken stream from a long distance away. but chances of picking up the average power line and moving it by hand? (non energized) no sweat. or at least minimal sweat. since it is air cooled and runs such high voltage, it's not that thick. |
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Post by silverdragon on Feb 26, 2018 7:25:49 GMT
Would be interested to see a comparison between USA and UK "Not that thick"... I had a small reel on my truck once, as in the whole reel was just about long enough to take me to weight limit, it looked thick enough to tie up a cruise ship. In a storm.
I have had to fight with 10mm cable to bend it into place for a shower, its quite hard to bend, I am going to go out on a limb and suggest the stuff running in the pylons not half mile from here is close on 5 to 10 times as thick?.
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Post by the light works on Feb 26, 2018 14:52:18 GMT
Would be interested to see a comparison between USA and UK "Not that thick"... I had a small reel on my truck once, as in the whole reel was just about long enough to take me to weight limit, it looked thick enough to tie up a cruise ship. In a storm. I have had to fight with 10mm cable to bend it into place for a shower, its quite hard to bend, I am going to go out on a limb and suggest the stuff running in the pylons not half mile from here is close on 5 to 10 times as thick?. the main transmission lines will be heavier, partially for the load, and partially for tensile strength. the distribution wire, as I said, varies with intended load, but it is uninsulated and air cooled, so it doesn't need as much metal to carry the amperage. the power line running past my house is about 10mm wire. now underground cables are much thicker, because they need isolation, insulation, shielding, more insulation, grounding, more insulation, and the protective jacket. and now I'm wondering, are you guys using solid wire for your 10mm? here, the biggest wire we will run solid wire for is 10 AWG. the only place 10mm (8AWG) puts up a fight is bending it into an undersized junction box. |
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Post by GTCGreg on Feb 26, 2018 15:28:03 GMT
Would be interested to see a comparison between USA and UK "Not that thick"... I had a small reel on my truck once, as in the whole reel was just about long enough to take me to weight limit, it looked thick enough to tie up a cruise ship. In a storm. I have had to fight with 10mm cable to bend it into place for a shower, its quite hard to bend, I am going to go out on a limb and suggest the stuff running in the pylons not half mile from here is close on 5 to 10 times as thick?. the main transmission lines will be heavier, partially for the load, and partially for tensile strength. the distribution wire, as I said, varies with intended load, but it is uninsulated and air cooled, so it doesn't need as much metal to carry the amperage. the power line running past my house is about 10mm wire. now underground cables are much thicker, because they need isolation, insulation, shielding, more insulation, grounding, more insulation, and the protective jacket. and now I'm wondering, are you guys using solid wire for your 10mm? here, the biggest wire we will run solid wire for is 10 AWG. the only place 10mm (8AWG) puts up a fight is bending it into an undersized junction box. And cramming it into a junction box is going to be a lot harder than dragging a length off the road. Even if it's obviously not energized, I still would not go near a downed power line. You never know when someone at the power company could reset a breaker or fuse or some idiot homeowner could fire up their back-up generator with it connect to the grid. |
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