Train GraphicClick on the map to explore geographics
 
I need help
FAQ
Emergency
About .
Travel & transport from BBC stories as at 01:15 29 Mar 2024
- Bus plunges off South Africa bridge, killing 45
- Easter getaways hit by travel disruption
- How do I renew my UK passport and what is the 10-year rule?
- Easter travel warning as millions set to hit roads
Read about the forum [here].
Register [here] - it's free.
What do I gain from registering? [here]
 02/06/24 - Summer Timetable starts
17/08/24 - Bus to Imber
27/09/25 - 200 years of passenger trains

On this day
29th Mar (1913)
Foundation of National Union or Railwaymen (*)

Train RunningShort Run
21:04 London Paddington to Plymouth
Delayed
21:45 Penzance to London Paddington
23:45 London Paddington to Penzance
PollsOpen and recent polls
Closed 2024-03-25 Easter Escape - to where?
Abbreviation pageAcronymns and abbreviations
Stn ComparatorStation Comparator
Rail newsNews Now - live rail news feed
Site Style 1 2 3 4
Next departures • Bristol Temple MeadsBath SpaChippenhamSwindonDidcot ParkwayReadingLondon PaddingtonMelksham
Exeter St DavidsTauntonWestburyTrowbridgeBristol ParkwayCardiff CentralOxfordCheltenham SpaBirmingham New Street
March 29, 2024, 01:27:32 *
Welcome, Guest. Please login or register.

Login with username, password and session length
Forgotten your username or password? - get a reminder
Most recently liked subjects
[98] West Wiltshire Bus Changes April 2024
[97] would you like your own LIVE train station departure board?
[86] Return of the BRUTE?
[74] Infrastructure problems in Thames Valley causing disruption el...
[53] If not HS2 to Manchester, how will traffic be carried?
[23] Reversing Beeching - bring heritage and freight lines into the...
 
News: A forum for passengers ... with input from rail professionals welcomed too
 
   Home   Help Search Calendar Login Register  
Pages: [1]
  Print  
Author Topic: WoE over-running engineering works 16 April  (Read 2485 times)
bradshaw
Transport Scholar
Hero Member
******
Posts: 1450



View Profile
« on: April 16, 2019, 09:38:06 »

Work between Salisbury and Tisbury has decimated the service, with disruption expected to last until end of service.
So far only the 0510 Exeter has got through and that, via Westbury, was terminated at Salisbury. Everything now going that way.
With all stock arriving as ecs in the morning there would be none available except that for the 0510. As a result the next up service will probably be the 1125 EXD» (Exeter St Davids - next trains) while the first down will be the 0710 WAT, running late due to the diversion.
Logged
bobm
Administrator
Hero Member
*****
Posts: 9810



View Profile
« Reply #1 on: April 16, 2019, 09:49:42 »

Tamper ran through a set of points at Wilton.
Logged
Phantom
Global Moderator
Hero Member
*****
Posts: 484



View Profile
« Reply #2 on: April 16, 2019, 10:23:50 »

Tamper ran through a set of points at Wilton.

I hate to be the one to ask, but what is "Tamper"?
Logged
bobm
Administrator
Hero Member
*****
Posts: 9810



View Profile
« Reply #3 on: April 16, 2019, 10:37:03 »

Something you type very carefully when auto-correct is about.   Grin

Seriously though it is an engineering train which moves the ballast and levels the track.

Not sure if this is a tamper or a stoneblower - but they look similar.

Logged
paul7575
Transport Scholar
Hero Member
******
Posts: 5316


View Profile
« Reply #4 on: April 16, 2019, 11:55:45 »

I think a video might explain better how a tamper does its job.   A stoneblower effectively is a tamper with the extra ability to add more ballast in a controlled manner.   

https://youtu.be/lQg1U5FxyS0

Paul

Logged
ellendune
Transport Scholar
Hero Member
******
Posts: 4452


View Profile
« Reply #5 on: April 16, 2019, 22:59:55 »

I think a video might explain better how a tamper does its job.   A stoneblower effectively is a tamper with the extra ability to add more ballast in a controlled manner.   

https://youtu.be/lQg1U5FxyS0

Paul

It is not clear from the video, but the tamper is also lifting the track as well as squashing the ballast.  As a student in the 1970's I worked on tamper development including the development of vibration to stablise the track after tamping (which was first used to allow track to be opened at line speed after blockades such as at Crewe) and the stoneblower development project. 

The problem with conventional tampers is the track subsides back to its old profile. Most of this happens in the first few load cycles. Broadly the first load does as much damage as the next ten and the following 100 cycles. 

Dynamic track stabilisers allow allow the track to be overlifted and then knocked back to the right profile before opening to traffic. 

Stoneblowers work by blowing additional ballast under the sleepers with compressed air.  It actually uses smaller sized stone otherwise it wouldn't get down the inside of the tines of the tamper.
Logged
bradshaw
Transport Scholar
Hero Member
******
Posts: 1450



View Profile
« Reply #6 on: April 17, 2019, 08:31:42 »

Line reopened 0415 this morning, 17th of April
Logged
grahame
Administrator
Hero Member
*****
Posts: 40690



View Profile WWW Email
« Reply #7 on: June 04, 2019, 22:01:41 »

An old tamper - from before the time that other gizmos were fitted - it's a bit clearer to see the moving part

Logged

Coffee Shop Admin, Acting Chair of Melksham Rail User Group, Option 24/7 Melksham Rep
Do you have something you would like to add to this thread, or would you like to raise a new question at the Coffee Shop? Please [register] (it is free) if you have not done so before, or login (at the top of this page) if you already have an account - we would love to read what you have to say!

You can find out more about how this forum works [here] - that will link you to a copy of the forum agreement that you can read before you join, and tell you very much more about how we operate. We are an independent forum, provided and run by customers of Great Western Railway, for customers of Great Western Railway and we welcome railway professionals as members too, in either a personal or official capacity. Views expressed in posts are not necessarily the views of the operators of the forum.

As well as posting messages onto existing threads, and starting new subjects, members can communicate with each other through personal messages if they wish. And once members have made a certain number of posts, they will automatically be admitted to the "frequent posters club", where subjects not-for-public-domain are discussed; anything from the occasional rant to meetups we may be having ...

 
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.2 | SMF © 2006-2007, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
This forum is provided by customers of Great Western Railway (formerly First Great Western), and the views expressed are those of the individual posters concerned. Visit www.gwr.com for the official Great Western Railway website. Please contact the administrators of this site if you feel that the content provided by one of our posters contravenes our posting rules (email link to report). Forum hosted by Well House Consultants

Jump to top of pageJump to Forum Home Page