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).
Requirements for Phantom dynamo armatures.
| Identifier | ExFiles\Box 68\4\ scan0264 | |
| Date | 25th April 1928 | |
| EFC. FROM R.{Sir Henry Royce} Copy to BJ. HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} X5663 R5/M25.4.28. PHANTOM DYNAMO - 2 ARMATURES FOR DIFFERENT SPEED & OUTPUT. X5663 X8664 Referring to your EFC2/T23428, I am not very particular whether you have 26 or 28 slots so long as they are alike on both armatures. The armature would be 3 and 4 turns respectively. Also that both dynamos, whichever armature is used, should have a less rapid falling output with speed than at present, which appears to be overdone in this respect. R.{Sir Henry Royce} | ||