Ricardo’s rolling stock design team in the UK recently passed a major milestone following London Underground’s Design Acceptance of the Kirow KRC250 Rail Crane and Switch Tilting wagons.
The official acceptance is the culmination of almost five years’ work to demonstrate the machines meet the requirements of the London Underground standard for On-Track Machines.
The deployment of the wagons will help accelerate track replacement works on London’s Metropolitan, Circle, District and Hammersmith & City Lines. These four lines are also known as the ‘Sub Surface Lines’ (SSL) as much of these routes operate above ground towards London’s outer suburbs.
Attention to the detail
Although switch tilting wagons have operated on the UK national network for several years, various design modifications were required for a model that must fit within the tighter confines of the SSL network. A key challenge was that the wagons needed to be approved for use on both the national and London Underground networks.
The project began in April 2015 with Ricardo’s teams working with London Underground and our client, Kirow Ardelt, based in Leipzig, to define the scope of the project.
Once the requirements were fully understood by all parties, our design teams developed the specific changes required for the underframe and spine of the switch tilting wagon.
As each design was developed, our experts compiled the engineering submissions that would be required to demonstrate compliance with both Network Rail Plant Acceptance standards as well as London Underground standards and their Technical Requirements Specification.
Our teams devoted over 14,000 hours to developing the evidence that demonstrated the required compliance.
These submissions were put to Ricardo Certification, an accredited independent business within the Ricardo group, who managed the sign off process with London Underground.