Updated 28th July.

If you are unable to login, you probably need to read this change to your username & profile.

 

Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC:

What keeps a train on track? 31 May 2020 09:17 #210899

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 4214
  • Thank you received: 2296
There is a tangent going off the Yankee Iron Fix thread about train wheels.

This is a great 2 minute explanation of how a train stays on the track - nothing to do with flanges which are only safety devices.



lang
The following user(s) said Thank You: geoffb, PaulFH, roKWiz, wee-allis

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 15:57 #210905

  • wee-allis
  • wee-allis's Avatar
  • Offline
  • Posts: 636
  • Thank you received: 323
Well I'll be ............ better informed.

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 16:44 #210909

  • bparo
  • bparo's Avatar
  • Offline
  • Posts: 3502
  • Thank you received: 169
trams do something similar but with a flatter taper. This is because the road is shared with other vehicles, pedestrian's etc and the taper as used on railway lines can be a tripping hazard. Also they tend to turn sharper corners. The metallic scrape you here as a tram turns into another street is the flanges rubbing on the rail.
Hiding in the shed covered in grease and muck - want a coffee?

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 16:45 #210910

  • roKWiz
  • roKWiz's Avatar
  • Offline
  • Posts: 341
  • Thank you received: 178
Some freight trains and the XPT round here lately obviously didn't get the memo.
Heritage Stonemason
In order that the labour of centuries past may not be in vain during the centuries to come... D. Did
The following user(s) said Thank You: cobbadog

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 16:54 #210911

  • bparo
  • bparo's Avatar
  • Offline
  • Posts: 3502
  • Thank you received: 169
no the video assumes the track is built on a solid roadbed and actually maintained. a lot of our lines particularly the Albury line suffers from a lack of both! The track is so bad it's throwing the trains from side to side so much it's relying on the safety devices.

I guess that's what happens when the organisation that owns and is responsible for the track is separate to the organisations running the train. The track organisation doesn't care if it costs the train organisations extra money. If the train operators don't like it the only alternative is Melbourne to Sydney via Adelaide and since the track owner owes that route too and effectively charges by the km...
Hiding in the shed covered in grease and muck - want a coffee?

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 17:06 #210912

  • roKWiz
  • roKWiz's Avatar
  • Offline
  • Posts: 341
  • Thank you received: 178
Yes would be nice. The federal government who own ARTC and have totally butchered this track several times over trying to fix it when they converted it to standard gauge back in 2007. hasn't been right since and now they want to double deck, should be entertaining to say the least.
Countrylink and Vline have no chance of operating a decent service as far as I can see.
Heritage Stonemason
In order that the labour of centuries past may not be in vain during the centuries to come... D. Did

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 17:07 #210913

  • Roderick Smith
  • Roderick Smith's Avatar
  • Offline
  • Posts: 3215
  • Thank you received: 218
That was a very good explanation, on lots of the physics.
He didn't reach track cant (road camber). A lot of that is more about passenger comfort than vehicle safety. What is thrilling at Luna Park or in a chartered aerobatic flight isn't desirable for paying customers just looking for comfortable transport.
Rollover and climbover are even more complex. Rollover exists on rail and road; climbover is just rail.
Newspapers made a great fuss about the recent Broadford overturn: '100 km/h around a 25 km/h curve'.
The curve was built for 40 km/h, with a huge margin between the posted speed and the safety speed (rule of thumb: double the posted speed is still safe; just uncomfortable).
If the train had been electric instead of diesel, it would have got around (lower centre of gravity).
That is similar to what we know on roads: the advisory curve speeds are way lower than most vehicles can handle. VicRoads still pictures 1950 Ford Prefects.
Roderick
The following user(s) said Thank You: hayseed

Please Log in to join the conversation.

What keeps a train on track? 31 May 2020 22:07 #210924

  • cobbadog
  • cobbadog's Avatar
  • Offline
  • Posts: 1349
  • Thank you received: 577
His next video should include the design shape of the track from new, it has a crown in it to complimemnt the taper of the wheel.
Cheers Cobba & Cobbarette
Coopernook, The Centre of our Universe.
COP-U-LATOR

Please Log in to join the conversation.

What keeps a train on track? 01 Jun 2020 05:46 #210931

  • lantana jack
  • lantana jack's Avatar
  • Offline
  • Posts: 199
  • Thank you received: 26

cobbadog wrote: His next video should include the design shape of the track from new, it has a crown in it to complimemnt the taper of the wheel.


The late Richard Feynman. The bane of the global warming cultists..;)





.
.


“The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin.” Thomas Huxley

Please Log in to join the conversation.

What keeps a train on track? 02 Jun 2020 16:46 #211001

  • cobbadog
  • cobbadog's Avatar
  • Offline
  • Posts: 1349
  • Thank you received: 577
I'm confused jack, what does that bloke have to do with railway track?
Cheers Cobba & Cobbarette
Coopernook, The Centre of our Universe.
COP-U-LATOR

Please Log in to join the conversation.

  • Page:
  • 1
  • 2
Time to create page: 0.289 seconds

Historic Commercial Vehicles Club of Australia Inc.  Post: P.O. Box 2020 Bayswater Vic. 3153    Clubrooms: Unit 8 / 4  Macquarie Place Boronia    Club Phone: 0400 025 525    Club Rooms:  03) 9738 1558