Bogie Rotational tests
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Before the amalgamation of the regional testing services at Derby and the building of the RTC with its new workshop and its specialised facilities, rotational stiffness testing of vehicle bogies was undertaken at Darlington on the small turntable just to the south of the station. This turntable is still in existence. Click on the pictures for a bigger image - All photos are from the author's collection. |
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EE Type 4 D344 stands with one bogie on the turntable whilst engineers conduct a rotational resistance test on the leading bogie by pulling the table around, and measuring the force taken to move the bogie. Note the test car marshalled behind the locomotive which would have housed the instrumentation. |
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Engineers check the instruments attached to the bogie centre pivot which would measure the rotational stiffness. Since the 1970's there has been a special turntable rig within the RTC workshop for this purpose. |