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).
Analysis of the Delage car's ignition system, comparing magneto and battery ignition options.
| Identifier | ExFiles\Box 37\1\ scan 135 | |
| Date | 26th June 1922 | |
| x3199 Extract from:- R1/M26.6.22. x3199 x430 RE DELAGE CAR. (1) If this is a specimen of Delage effort to cutout R.R. it is not a bit like R.R. (2) Double spark magnetos which naturally require double the difference of EMF are not reliable and need a higher speed for starting. (3) I should prefer battery ignition for investigation to magnetos if only one ignition is fitted. (4) The advantage of 2 separate ignitions (one being battery, for starting) is in investigation in case of fault - because if the engine fails one can tell at once if it is faulty ignition or carburation. | ||