The Structure Gauging Train (SGT)
The present SGT had its beginnings in the mid-1970's. Several experiments were carried out utilising the four-wheeled Wickham Self-propelled laboratory (sometimes known as the Elliot Track recording car). Using a dual-triangulation system with lights and cameras this optical method was a big improvement over the existing ways of gauging. It was trialled at Old Dalby. |
This is view of the Wickham car
with the solebar-mounted equipment was taken at Old Dalby
Author's collection |
|
Here's a close-up
Author's collection |
The work pioneered at Old Dalby with the Wickham lead the way for the building of the special Structure Gauging Train in the early 1980's. It was completed for the Director of Civil Engineering in the summer of 1986, the project having been in the development stage for many months. A specially-built four wheel structure-gauging optical vehicle, ZXQ DC460000 based on a steel carrier chassis, was formed as the middle car of a 3-vehicle formation. The two outer coaches were RDB975081 ( formerly Test Coach Hermes converted to a driving trailer vehicle and re-numbered DB975081) and RDB975280 - (formerly Test Coach Mercury) became DB975280 and housed computer data collection and staff facilities. The two vehicles had previously been used extensively by the Train Control Group at the Mickleover test track and elsewhere from the early 1970's. |
Following major changes within the Research Division in the late 1980's the SGT was transferred to the DM& EE and then to Railtest. The present SGT is operated by DB Schenker on behalf of Network Rail |