If you don't like 'maths', pass on this one.
+5
past it
Hinch
Chill37
southernbelle
Atlas
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If you don't like 'maths', pass on this one.
And I don't mean 'pass it on' - I mean 'PASS'.
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
Atlas- Time Lord
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southernbelle- Space Cadet
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Re: If you don't like 'maths', pass on this one.
Atlas wrote:And I don't mean 'pass it on' - I mean 'PASS'.
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
Havnt a clue- is there a reason for this question?
Chill37- Officer of the Watch
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Re: If you don't like 'maths', pass on this one.
God knows the answer to this one. I just buy my ticket, get on the train and hope that the permanent way gang have done their homework.
Hinch- Spaceship Commander
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Re: If you don't like 'maths', pass on this one.
Is the answer 42?
Chill37- Officer of the Watch
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Re: If you don't like 'maths', pass on this one.
You need a trained mind to answer that one!
past it- Crew
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Re: If you don't like 'maths', pass on this one.
choo choo 32 ?
Absolutely no idea
Absolutely no idea
Jeanie- Officer of the Watch
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Re: If you don't like 'maths', pass on this one.
Chill37 wrote:Atlas wrote:And I don't mean 'pass it on' - I mean 'PASS'.
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
Havnt a clue- is there a reason for this question?
Yep. I don't want to kill my passengers by turfing them over the embankment.
Is that a quess jeanie.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
Hinch wrote:God knows the answer to this one. I just buy my ticket, get on the train and hope that the permanent way gang have done their homework.
My you are a trusting fellow.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
I was once on a train that derailed. (A three-set DMU 'Red Dragon' service at Abergele and Pensarn circa 1962/3.)
I was only 12 or 13. An interesting experience. Great to sit in our green and cream British Railways camping coach in a siding at Abergele Station and watch the crane come out from Llandudno Junction to lift it back on.
I have no idea to work out the answer to your question Atlas but then I struggle counting down from 301 on the dartboard.
I was only 12 or 13. An interesting experience. Great to sit in our green and cream British Railways camping coach in a siding at Abergele Station and watch the crane come out from Llandudno Junction to lift it back on.
I have no idea to work out the answer to your question Atlas but then I struggle counting down from 301 on the dartboard.
Hinch- Spaceship Commander
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johnb- Space Cadet
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Re: If you don't like 'maths', pass on this one.
Atlas wrote:Chill37 wrote:Atlas wrote:And I don't mean 'pass it on' - I mean 'PASS'.
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
Havnt a clue- is there a reason for this question?
Yep. I don't want to kill my passengers by turfing them over the embankment.
Is that a quess jeanie.
Yes of course it's a quess is it right ???
Jeanie- Officer of the Watch
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Re: If you don't like 'maths', pass on this one.
johnb wrote:What gauge?
seven and one quarter inch.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
[quote="Jeanie"][quote="Atlas"]
Yes of course it's a quess, is it right ???
How would I know? It's not a b***** quiz!
Chill37 wrote:Atlas wrote:And I don't mean 'pass it on' - I mean 'PASS'.
A loco and a carriage measure in total length 16 feet including the 6" long spacer coupling.Q. What is the tightest radius, given that the carriage is on bogies, that can be laid to safely traverse both vehicles in a complete circle without de-railing.
This is for railway technical engineers only. There are no prizes on offer. No trick question and a headache for the winner. Enjoy -
Is that a quess jeanie.
Yes of course it's a quess, is it right ???
How would I know? It's not a b***** quiz!
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
It may need a bit of working out but you also have to take into account who is driving the train Jeanie. Will Atlas be driving the train?
teamplayer2- Spaceship Commander
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Re: If you don't like 'maths', pass on this one.
And the estimated axle load?
johnb- Space Cadet
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Re: If you don't like 'maths', pass on this one.
max - 5cwt. The load is only a consideration for possible rail spread. Given the construction much greater loads could be carried without affecting the gauge - but the occassion wouldn't arise.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
Not strictly true:
The carriage and the loco both behave as chords of a circle, which means that on cornering their centre of load moves in towards the centre of the circle, thre is a turning moment and the carriage can topple inwards.
There are lots of other issues - the effects flanging included.
By the way, are the carriage and engie on bogies or are they rigidly connected?
The carriage and the loco both behave as chords of a circle, which means that on cornering their centre of load moves in towards the centre of the circle, thre is a turning moment and the carriage can topple inwards.
There are lots of other issues - the effects flanging included.
By the way, are the carriage and engie on bogies or are they rigidly connected?
johnb- Space Cadet
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Re: If you don't like 'maths', pass on this one.
Agreed johnb - but we are not talking excessive weights or a circle - the form would be almost pear-shaped as in a loop thus the spread or inverse effect is almost neutralized - is it not?
The Loco is 0-6-0 with a coupling (approx 6") to a tender which is rigid 4 wheel. The carriage is again coupled to the tender with a 6" coupling. Overall total length 16ft.
The Loco is 0-6-0 with a coupling (approx 6") to a tender which is rigid 4 wheel. The carriage is again coupled to the tender with a 6" coupling. Overall total length 16ft.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
Why try to turn round...just reverse it
Charly- Spaceship Commander
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Re: If you don't like 'maths', pass on this one.
Just going round in circles Charly.
teamplayer2- Spaceship Commander
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Re: If you don't like 'maths', pass on this one.
In that case the limiting factor will probably be the wheelbase of either the loco or the carriages, depending which is longer. The restriction to curve radius is the limit imposed by flanging and that is determined by the difference between the rail centres and the distance between the wheel flanges. There is probably a table somewhere in the gauge track specification.
johnb- Space Cadet
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Re: If you don't like 'maths', pass on this one.
Charly wrote:Why try to turn round...just reverse it
Not allowed charly - propelling is very restrictive and cannot be exercised unless in an emergency situation or with adequate safeguards in place. Therefore - we don't want to make a practice of it in this particular situation whereby the 'transit' system is under constant daily use - ergo - a loop.
Atlas- Time Lord
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Re: If you don't like 'maths', pass on this one.
Have you considered a points bypass?
johnb- Space Cadet
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Re: If you don't like 'maths', pass on this one.
RESISTANCE OF CURVES.
Curved track increases the resistance of trains in direct proportion to the shortness of curvature. In European railways, the character of the curves is nearly always denominated by the length of radius: in this country, a railroad curve is described as of so many degrees. The degree of a curve is determined by the angle subtended at its center by a chord of 100 feet. To those who think of a curve by its radius, it may be well to explain that a curve of one degree has a radius of 5,370 feet, and the radius of any curve can be ascertained by dividing these figures by the number of degrees.
Curved track increases the resistance of trains in direct proportion to the shortness of curvature. In European railways, the character of the curves is nearly always denominated by the length of radius: in this country, a railroad curve is described as of so many degrees. The degree of a curve is determined by the angle subtended at its center by a chord of 100 feet. To those who think of a curve by its radius, it may be well to explain that a curve of one degree has a radius of 5,370 feet, and the radius of any curve can be ascertained by dividing these figures by the number of degrees.
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