Investigation into the fracture of three porcelains from the Shenfield/Southend conversion on E.R. (TM-ETR-112)

Following a number of MK III porcelain fractures on E.R. a request was made through the O.H.L.E. Working Party for an investigation to be carried out by the R. & D. Div. into the failure mechanism and also for mechanical testing of some new porcelains to be performed to check...