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).
Proposed ignition scheme with a twelve-point distributor.
| Identifier | ExFiles\Box 61b\4\ scan0184 | |
| Date | 7th February 1931 | |
| EFC4/ADL7.2.31 contd. -2- then in the succeeding cycle (A) ignition would fire (b) sparking plug and (B) ignition (a) sparking plug. then if one ignition failed all the sparking plugs would still be in use every other time. This would require a six point cam to be driven as at present at half engine speed operating two contact breakers 180° apart together with one twelve point distributor driven at quarter engine speed with two rotors placed 180° apart. The disadvantage would lie in the requirement of simultaneous advance and retard of the contact breaker and distributor. Perhaps this scheme is not worth consideration but it may contain a suggestion leading to a further and better scheme. EFC. | ||