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).
The supply and testing of 4 distributor rotors with thicker crowns.
| Identifier | ExFiles\Box 61b\2\ scan0105 | |
| Date | 19th April 1929 | |
| EFC. X7690 19.4.29. Herewith 4 off distributor rotors. These have slightly thicker crowns as per your recommendation. Will you kindly test them for breakdown at your earliest so that I can proceed with moulding supplies. E.J.Brock. | ||