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).
List of angles for different configurations of the Phantom 28 slot dynamo.
| Identifier | ExFiles\Box 68\4\ scan0039 | |
| Date | 20th July 1928 | |
| X8672 20.7.28. PHANTOM 28 SLOT DYNAMO (N.B.) ANGLES. Remarks. Standard 29 slot 8º 121º I on 9-EX with 28 slot armature 7.5º 122º Half way to M.P. K on 12-EX with 28 slot armature 9º 122.5º M.P. Recommended for 28 slot armature 9º 124º Representative. EFC. | ||