Metro Helsinki: Bogie going over a switch in slow motion (3 fps)

[VivaHelsinki]

Oh god, what a waste of 49seconds!

[DarkDudeForever]

@mazofi

i know that the wheel is cone shaped, but what makes the bogie return in the "forward" position ??? ;)

[mazofi]

@DarkDudeForever what do you mean with "forward position"

[DarkDudeForever]

@mazofi

straight ^^

[DarkDudeForever]

thx but that's not what i asked ^^

i wonder what makes the bogie return in the initial position after a curve! ;)

[mazofi]

@DarkDudeForever I was trying to say that wheels steer themselves to correct position due to the cone shape and the bogie follows.

[DarkDudeForever]

ok thx :)

do you know what makes the bogie return in the initial position after a curve ?

[mazofi]

@DarkDudeForever Wheels are slightly cone shaped which means the wheel diameter is larger near the flange and smaller on the other side. On curve, outside wheel runs on larger diameter than inside wheel. On straight track they tend to run on same diameter part of the wheels.

If I did not explain this well enough, you should search the web. There are multiple pages explaining the same thing with pictures and everything :).

[DarkDudeForever]

what's the guard rail for ?

[mazofi]

@DarkDudeForever It prevents the flange of the other wheel to crash in to the common crossing.