How do trains go around curves?

rail cars weigh in excess of 100 tons, axle is one solid piece of steel slippage is nil a flange keeps the wheel-axle from going off the rail, but does,nt make it go around the curve.

Best Answer:

guillermina: As other have mentioned the "cone shape". on the wheels. This slightly different size allows the wheels to turn at a different speed to compensate for the extra distance on the outside of a curve. Simple answer it is a little more technical.

Other answer:

guillermina:
Every part of a railroad track is a curve or a tangent to a curve. The radius of the curve and the amount a curve is banks are very important parts of track design. And there are orders for maximum speed on curves.

When a train goes around a curve the wheels on the outer side will have to travel father than the wheels on the inner side so there will be some slippage in the inner side of the curve. And both the track and the wheels will wear more on the inner side.

What this all amounts to is that it is very possible for trains to go around curves and all trains do. But it is important todesigv the track with the fewer possible curves and make the curves have the maximum possible radius.

Rona Lachat:
You are assuming that the train wheels are completely flat.
They are sloped while in the curve the individual wheels have a slightly different circumference in contact with the rail Each end of the axle turns just a bit different. This difference makes the train turn.
http://www.railway-technical.com/whlbog….
Raymond:
The rails on the ground are actually tilted and/or raised on side to allow the train to go around the curve
Bertsta:
Nah, the wheels slip dude, otherwise it would not be physically possible without the axle twisting. Bear in mind that the friction coefficient for steel on steel is very small; it has 1/30 to 1/70 the grip of rubber on concrete. That's why trains can't tackle steep gradients.. It is all too easy to light up the wheels.

Steel on Steel f = 0,0005m
Wood on Wood f = 0,0015m
Iron on iron f = 0,00051m
Iron on granite f = 0,0021m
Iron on Wood f = 0,0056m
Polymer on steel f = 0,002m
Hard rubber on Steel f = 0,0077m
Hard rubber on Concrete f = 0,01 -0,02m
Rubber on Concrete f = 0,015 -0,035m

Andy:
Rona is exactly right. It has nothing to do elevation of a curve. The link she provided explains it very well.
Sally:
They just go around them by driving and following the track.
One Who Sits on Pizza:
Magic. It's magic dude.
Willie:
Slowly.
d@dz:
a calculated camber is incorporated into the track radius.

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