A steam train not seen since the 1960s is being rebuilt by a group of engineering enthusiasts, assisted by the metrology experts at the University of Sheffield Advanced Manufacturing Research Centre (AMRC). With a little extra help from Hexagon’s advanced industrial laser tracker technology, the team got the measure of a mysterious discrepancy between the original drawings and the actual locomotive.

The Standard Steam Locomotive Co. group has set itself the ambitious challenge to recreate, operate, and maintain a lost class of British steam train—a British Railways’ Standard Class 6 “Clan”—using a combination of the original 1950s design drawings and 21st-century engineering. The plan is to incorporate modern design and manufacturing techniques and technologies into the build.

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