Why do circuit breakers go up for on and down for off?
Feb 11, 2023 Last reply: 2 years ago 1781 Replies
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rbowman
The US uses intermodal transportation. A truck loads freight and takes the loaded trailer to a rail depot or port and the entire trailer is transferred. It may either be a container that is placed on a chassis for truck transport or sometimes the complete road trailer.
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J
John Larkin
I got busted for putting coins on a track to be smashed flat. They tooks us into the station office. We got a lecture, catch-and-release.
S
SteveW
Containers go on trains here, but not usually entire trailers. Due to being the first to develop railways, they were mainly built with bridges and tunnels too small to allow that.
C
Commander Kinsey
Isn't that some weird Apple invention? Apple users are always going on and on about their colours.
C
Commander Kinsey
If you type in a colour you'll find several different RGB values depending on the opinion of the writer.
I can tell two colours apart if they're together, I hated 256 colour displays.
C
Commander Kinsey
I've killed 3 mice a day in the last week with 7kV. It f****ng stinks though. Maybe half an amp is a bit much.
R
rbowman
Lack of foresight... There may be routes in the US that are restricted. There are trucker atlases showing truck routes where there are no underpasses with less than 13' 6" clearance. There may be something similar for trains.
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" Nonetheless, North American railroads have invested large sums to raise bridges and tunnel clearances along their routes and remove other obstacles to allow greater use of double stack trains and to give them more direct routes."
Related factoid: the Tiger tanks were a little too wide for the regulation tunnel widths so when they were shipped by rail the outer road wheels were removed and a narrow track installed.
C
Commander Kinsey
My Chemistry teacher once came in 10 minutes late in a fluster. His excuse was his wife (my cooking teacher) was "putting on her makeup with a shovel". She looked like Al Bundy's wife in Married With Children, but way more makeup.
We never painted our Tamiya stuff, as it was often involved in crashes.
C
Commander Kinsey
I knew mauve fawn and beige and they all looked the same to me. Just light brown isn't it?
Sounds like a French delicacy.
C
Commander Kinsey
Birds aren't good at decorating.
C
Commander Kinsey
Best thing for inside and outside are half logs.
C
Commander Kinsey
Should you not have been paying attention to your ex?
J
John Larkin
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Rod Speed
My what you lot call a grade school has a railway line a long way down a very steep drop below the school yard boundary.
We put some coins on the rails for the first time and then discovered that a whole f****ng train was stopped right where we had put the coins.
Turned out that they were just resleepering that line and the train was just offloading the new sleepers.
We shat our pants about what we had done :-(
S
SteveW
Yes, I've seen them before.
As you can see here:
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the AVERAGE loading gauge in England is far smaller. Some lines are smaller still and require locos and rolling stock with reduced height and/or width.
S
SteveW
Not really. Much of the network was built well over 100 years ago. Due to the crowded nature of the UK, it would be incredibly disruptive to update the huge number of bridges and tunnels here - there are six bridges within a mile of me now, all on the same line, to connect two sides of the town. To raise some of them would require very steep approaches or demolishing a lot of buildings to allow a more gradual approach.
Unlike the US, we have mainly used bridges over the track (some under) rather than level crossings and trains run fenced off from the public, requiring more bridges, as the public cannot cross elsewhere. Which is why we have far fewer road/rail collisions than the US.
We simply have systems that have developed in different ways and ours is harder to update for bigger trains.
There is. You can find videos of trains that have been sent along the wrong route, such as this:
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It is less worth it here, as the journeys are shorter and it is usually quicker to just use the roads, rather than have to tie in with a railway schedule and travel to and from a depot at each end.
I have a vague memory of hearing that.
F
Fredxx
Exact multiples of 455kHz would at most create a motor boating or undulating volume through a slowly changing demodulated DC component. I can only assume her IF was not at 455kHz?
R
rbowman
When my father was a kid there was a trolley line that went out to an amusement park. That was a common ploy to encourage weekend ridership on the street cars. The kids would amuse themselves by greasing the rails on a slight incline. The trolleys didn't have the sand dispensers that were common on locomotives so the conductor would have to get out with a shovel.
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Max Demian
Just put it in first gear and crank the starter. Hang on, that won't work with modern cars as you can only operate the starter in neutral.
Another time you need to start in gear is if the clutch cable breaks and you want to start and do clutchless gear changes. (MK1 Escorts were good at that.)
M
Max Demian
They should have fined you forty shillings. Taken from your pocket money.
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