What is a "chord"?
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What is a "chord"?
I've recently come across the term "chord" (specifically the "Nuneaton North Chord") but cannot find any railway-related meaning to that term in any dictionary. I suspect it's just a fancy term for a flyover. Can somebody please educate me?
(Not a native speaker btw)
(Not a native speaker btw)
Re: What is a "chord"?
Is it possible short for Corridor?
I know there's a lot of local names and railway slang around.
One of our main stations has a small slow line which is nicknamed 'The Cupboard'. Goodness knows why
I know there's a lot of local names and railway slang around.
One of our main stations has a small slow line which is nicknamed 'The Cupboard'. Goodness knows why
Re: What is a "chord"?
"a straight line joining the ends of an arc."
Similar to a chord across a circle, a chord in railway jargon is a supplemental alignment that cuts across between two other lines etc. Basically a spur that connects to something rather than being just a spur.
Similar to a chord across a circle, a chord in railway jargon is a supplemental alignment that cuts across between two other lines etc. Basically a spur that connects to something rather than being just a spur.
Re: What is a "chord"?
Additionally, in railway alignment "chords" are used for measuring transitional curves in Hallade method. In the UK it's customary to use 20 m (roughly 1 chain).
Guess the engineers just went "eh, we'll call the curved line a chord as well then !"
Guess the engineers just went "eh, we'll call the curved line a chord as well then !"
YNM = yoursNotMine - Don't get it ?
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Re: What is a "chord"?
Two other UK chords that spring to mind are the "Holmes Chord" which links Rotherham Central to Meadowhall, and, the "Hazel Grove Chord", near Stockport which provides a link from the Hope Valley route to Stockport.
A "chord" tends to be a newer piece of railway linking two routes that historically did not have a connection at that point.
A "chord" tends to be a newer piece of railway linking two routes that historically did not have a connection at that point.
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Re: What is a "chord"?
Ordsall Chord being the newest I guess !
YNM = yoursNotMine - Don't get it ?
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Re: What is a "chord"?
Thanks, everybody!
Re: What is a "chord"?
Yes I think its definition in the Railway sense largely comes, much like the chord of a circle, from the fact chords appear to be a more direct route to something, which as Badger says necessitates them to be newer than what was there before.
You sometimes hear it used to refer to any line linking two others, but that’s rather erroneous. You also hear it referring to one side of a triangle sometimes. I suppose Ordsall is an extreme example as it’s quite a big triangle. There’s a single track chord linking the North London Line with the GEML to the south at Stratford.
Often depot men would regularly talk of engines being at the “back of the lake” (a small puddle), or “through the puzzles” (the points).
Plenty more exist, often less polite and subject to intense localisation.
You sometimes hear it used to refer to any line linking two others, but that’s rather erroneous. You also hear it referring to one side of a triangle sometimes. I suppose Ordsall is an extreme example as it’s quite a big triangle. There’s a single track chord linking the North London Line with the GEML to the south at Stratford.
Probably because you’re left there to be forgotten about where’s that anyway!?I know there's a lot of local names and railway slang around.
One of our main stations has a small slow line which is nicknamed 'The Cupboard'. Goodness knows why
Often depot men would regularly talk of engines being at the “back of the lake” (a small puddle), or “through the puzzles” (the points).
Plenty more exist, often less polite and subject to intense localisation.
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Re: What is a "chord"?
In honest, that isn't probably isn't untrue I've been forgotten about a few times or best one yet "Sorry to ask driver, but where on earth are you going?". What a day that was!Dave wrote:Probably because you’re left there to be forgotten about where’s that anyway!?I know there's a lot of local names and railway slang around.
One of our main stations has a small slow line which is nicknamed 'The Cupboard'. Goodness knows why
'The Cupboard' is the slow approaching Cambridge
Re: What is a "chord"?
My favourite named chord is 'Bacon Factory Chord'.
https://www.google.com/search?q=bacon+f ... =703&dpr=2
https://www.google.com/search?q=bacon+f ... =703&dpr=2
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Re: What is a "chord"?
That's known as the Ordsall Curve.YNM wrote:Ordsall Chord being the newest I guess !
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Re: What is a "chord"?
Not according to Network Rail it isn't, referred to as the Ordsall Chord in the Sectional Appendix.Badger wrote:That's known as the Ordsall Curve.YNM wrote:Ordsall Chord being the newest I guess !
I can't say I've ever heard of it called the Ordsall Curve until now to be fair.
Re: What is a "chord"?
For sure you wouldn't call the sharp curve on ECML at Morpeth a "chord".Pilot wrote:Not according to Network Rail it isn't, referred to as the Ordsall Chord in the Sectional Appendix.Badger wrote:That's known as the Ordsall Curve.YNM wrote:Ordsall Chord being the newest I guess !
So I guess, a chord is :
- A curvy-line of track
- Fairly short
- Connects two other things
- Wasn't the first to exist
YNM = yoursNotMine - Don't get it ?
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