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).
Comparing the machined cylinder for car 12-G4 with the standard cylinder from car 17-G3.
| Identifier | ExFiles\Box 103\4\ scan0049 | |
| Date | 30th April 1929 | |
| To E.{Mr Elliott - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} X5050 Hsl/T30.4.29. We attach herewith marked print of the cylinder as fitted to 17-G3 car. The cylinder on 12-G4 is a standard cylinder machined out so that the sections are much thinner than on 17-G3. Hs.{Lord Ernest Hives - Chair} E.52692 herewith. | ||