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).
Query regarding modifications made to Phantom valve springs due to insufficient coil clearance.
| Identifier | ExFiles\Box 17\6\ Scan021 | |
| Date | 1st February 1928 | |
| BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} +7060 E2/M21. 2. 28. PHANTOM VALVE SPRINGS. X. 8060 X. 290 X. 7060 The last valve springs we made for the Phantom were LeC.2479., and these had a total dimensional coil clearance of .217" and .201" for the outer and inner springs respectively. We were however informed that these clearances were found insufficient, and that the springs had to be modified. Would you kindly let us know what alterations were made so that we can provide for them on EAC.10. E.{Mr Elliott - Chief Engineer} | ||