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).
Performance graph showing the Ampere Output and Operating Voltages of a Phantom Dynamo at various speeds.
| Identifier | WestWitteringFiles\Q\December1926-January1927\ 27 | |
| Date | 10th December 1926 guessed | |
| AMPERE OUTPUT OPERATING VOLTAGES SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR PHANTOM DYNAMO REPRESENTATIVE OUTPUT CURVE OF STANDARD PHANTOM DYNAMO AT 80°C. CURVE OF OUTPUT AT 80°C AS REDUCED BY RESISTANCE INSERTED BY AUTO-SWITCH. DYNAMO R.P.M CHASSIS M.P.H. WITH 19/62 AXLE AND 33.5" TYRES | ||