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 tests and calculations for a battery ignition system.
| Identifier | ExFiles\Box 54\5\ Scan255 | |
| Date | 31th July 1924 guessed | |
| X 3485 X.3485 X.4357 - R.R. BATTERY IGNITION. (Standard .55 make ratio at 700 R.P.M.) (1) Measurement of inductance of coil. (2) Gap make ratio curve at 700 R.P.M. (3) Make ratio speed curves at .45, .55, and .65 at 700 R.P.M. (4) Observation of normal running current with several standard ballasts. (5) Deduction of working circuit resistance. (6) Calculation of R.M.S. current. (7) Check of resistance of circuit. (8) Complete table of figures. (9) Consumption curves for standard coil etc. | ||