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).
Comparison of ignition characteristics between a Scintilla magneto and a battery system, illustrated with a graph.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan108 | |
| Date | 14th July 1924 | |
| ORIGINAL 4 TO B. & HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} S E C R E T. RL/M14.7.24. C. to CG. DJ. WOR.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. 11. " RG.{Mr Rowledge} DY.{F R Danby} EFC. " DA.{Bernard Day - Chassis Design} FN. IGNITION. SCINTILLA MAGNETO & R-R BATTERY. X8720 X4187 X8780 It was pointed out that by varying the characteristics of the rate of hand control of the battery and magneto ignitions, we could get over the difference of the required, and available amount of hand control of each respectively, something like this:- Rate of advance. Magneto area = total. Battery area = total. Advance. Full hand control. For starting on the spark. For variations. R.{Sir Henry Royce} | ||