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).
Graph of the average output curve for a 20HP chassis dynamo at 85°C.
| Identifier | ExFiles\Box 51\1\ Scan173 | |
| Date | 13th July 1922 | |
| AVERAGE OUTPUT CURVE OF 20HP RR. CHASSIS DYNAMO AT 85°C OPERATING VOLTAGE 15.35 15.1 14.85 14.6 14.35 14.1 13.85 13.6 AMPERE OUTPUT 14 12 10 8 6 4 2 0 DYNAMO R.P.M. 0 400 800 1200 1600 2000 2400 2800 3200 3600 CHASSIS M.P.H. 0 5.4 10.8 16.2 21.6 27.0 32.4 37.8 43.2 48.6 E.P.C 13/7/22 | ||