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).
Clarifying that no modifications have been made to the Phantom II cylinder head.
| Identifier | ExFiles\Box 14\3\ Scan063 | |
| Date | 18th July 1931 | |
| To E.{Mr Elliott - Chief Engineer} From Hs.{Lord Ernest Hives - Chair} 87050 Hs.{Lord Ernest Hives - Chair}3/MJ.18.7.31. PHANTOM 11 CYL. HEAD. When I was at W.W. the other day you mentioned that you thought the Phantom 11 cylinder head had been modified, making the sides of the combustion chamber parallel. This is not the case. There has been no alteration to the combustion chamber since it was first introduced. Hs.{Lord Ernest Hives - Chair} | ||