DR 73943 - Plasser & Theurer Tamper/Liner
Introduction
The photograph on this page of DR 73943 - Plasser & Theurer Tamper/Liner by Evelyn Simak as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Evelyn Simak Taken: 30 Nov 2009
Tamping machines > http://www.geograph.org.uk/photo/1604048 are used by engineers on the railway to pack (or tamp) the stone ballast which supports the track. The ballast needs to be firmly packed to avoid unwanted track movements; however, even tightly-packed ballast allows some flexibility. Before the introduction of mechanical tamping machines, the job had to be done by manual labour. This only partly consolidated the ballast so speed had to be restricted over renewed track until the passage of trains had bedded-in the ballast: track which has been mechanically tamped can be operated at full line speed much sooner. The machine was built in 2004/05 by Plasser & Theurer who are based in Linz, Austria, where most of the parts used in the work units, hydraulic elements or bogies are being manufactured.