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Blog Entry# 4966490
Posted: May 21 (21:16)

21 Responses
Last Response: May 24 (14:50)
Info Update
May 21 (21:16)  
नेकी कर दरिया में डाल । ऊपर वाला सब देख रहा है
Venky63~   5950 blog posts
Entry# 4966490            Tags   Past Edits
How does train bogie/ coach travel in curve

1.The wheels on each side of a train car are connected with a metal rod called an axle. This axle keeps the two train wheels moving together, both turning at the same speed when the train is moving. ... This is where the wheels' geometry comes in. To help the wheels stay on the track their shape is usually slightly conical.

2.The only part of a train wheel that actually touches the rail is around the size of a 10 cent/20pence coin. Think about that the next time you're hurtling along at 130Kph. Actually - the wheel flange very rarely touches the rail. What keeps the train on the track is the conical angle of the wheel profile.
3. Why do trains not derail?
the reason these trains never tip is also because of their conical wheels. The conical wheels' shape, every time the train tips, the amount that it tips acts to restore the train upright. This force, called a restoring force, is stronger when the train is heavier meaning heavier trains are more stable .
Source - science journal

16 Posts

May 21 (22:11)
Rain rain go away
Ben_Kenobi~   4222 blog posts
Re# 4966490-17            Tags   Past Edits
They have good TE, but the fact that only one wheel produces effort and the rest just drag along works against it.
Effective TE in motion is always greater with diesel and electric.
Fun fact: max gradient that steam loco can climb is 1:37. Try figuring out where you have seen this figure :D

May 21 (22:13)
Taarak Mehta Ka Ooltah Chasma
Brandon12663^~   29731 blog posts
Re# 4966490-18            Tags   Past Edits
Added in FAQ list
See /faq/post/2328

May 23 (02:04)
Ravi~   3460 blog posts
Re# 4966490-19            Tags   Past Edits
This is about linear approximation of nonlinear problem.

May 24 (14:38)
💥 ताप्ती गंगा एक्सप्रेस 💥
Krishna.Kushwah^~   2001 blog posts
Re# 4966490-20            Tags   Past Edits
Banking of Roads/Centripetal Force ka concept lagta hai tumne nahi padha koi nahi Class 11th ki Physics ki NCERT dekh lena.

May 24 (14:50)
नेकी कर दरिया में डाल । ऊपर वाला सब देख रहा है
Venky63~   5950 blog posts
Re# 4966490-21            Tags   Past Edits
I never asked you question ???, it was directed to madan mohan
why you are jumping in between ..
For yr information ,vehicle tyres are free in road and steering controls the angle of drive of vehicle .centripetal force and centrifugal force prevents it from toppling . Incase vehicle travels at speed force greater than centripetal force ,vehicle will topple.

But in train , the axle & yRail width is fixed .
So conical wheel is used for easy manouvare during turing .one whell will travelore distance and opposite wheel will travel less distance .see the wheel design in my original post
Next coach is connected to wheel bogie with big swivel joints .the swivel joints rotate in the direction of turn and once train comes to straight portion ,it is pulled back to original position by centrifugal force .

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