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).
Design of a double battery ignition system for the Japan 3 model, including a sketch.
| Identifier | ExFiles\Box 61b\4\ scan0179 | |
| Date | 2nd February 1931 | |
| R.{Sir Henry Royce} FROM E.{Mr Elliott - Chief Engineer} C. to BG. WBN. C. to BY.{R.W. Bailey - Chief Engineer} EES. X.6105. El/M2.2.31. DOUBLE BATTERY IGNITION FOR JAPAN 3. We note your remarks with reference to the above. Our original idea in proposing this to HS.{Lord Ernest Hives - Chair} was to make the ignition equipment for both P. 2. and Japan 3. interchangeable, and to make an ignition tower with one governor, one drive, and one distribution only. We realise that there is a difficulty in feeding two sources of H.T. current into the same rotor and yet maintain sufficient surface insulation between to prevent an earthed plug on one side affecting the other, but this difficulty might be overcome. One scheme that might be considered is to arrange a central contact and a slip ring on the rotor, as in the sketch, firing simultaneously plugs in the same cylinder. There should be no difficulty with the low tension. Since writing the above we have found an illustration of the Continental Engine with equipment apparently of this nature, and attach same herewith, page 41. of the "Automobile Engineer" for January. We will endeavour to find out how the current from the two coils is handled in this distributor. E.{Mr Elliott - Chief Engineer} | ||