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).
Asking about the severity of piston knocks on the Phantom II and if extra oil would help.
| Identifier | ExFiles\Box 15\3\ Scan055 | |
| Date | 16th April 1931 | |
| To Br.{T. E. Bellringer - Repair Manager} From Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} X7 040. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}4/KT.16.4.31. Will you please let us know whether you consider piston knocks are serious on the Phantom II., also whether in your opinion you think that extra oil to the cylinders will prevent piston knocks. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||