From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Micro-examination report on two broken valve springs from chassis No. 3BT.179.
| Identifier | ExFiles\Box 158\4\ scan0170 | |
| Date | 11th August 1937 | |
| no dk 1360 Micro Examination Report M.{Mr Moon / Mr Moore} 1,383 BY.{R.W. Bailey - Chief Engineer} from H1/EJW. c. to Cgh{W Clough}/EM. c. to Rm.{William Robotham - Chief Engineer} ✓ H1/EJW.1/JN.11.8.37. Laboratory TWO BROKEN VALVE SPRINGS FROM CHASSIS No.3BT.{Capt. J. S. Burt - Engineer}179. (Your Ref. Cgh{W Clough}/EM.6/W.9.8.37.) Each of these springs contained a seam - see attached photograph, No.M.1,383, of an etched specimen from each spring. In each case the fracture started from the seam. H1/E.J.W. | ||