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).
Recommendation to experiment with a higher voltage ignition coil to address engine missing issues on various chassis.
| Identifier | ExFiles\Box 37\1\ scan 190 | |
| Date | 8th May 1931 guessed | |
| (6) the fact of the plug voltage being reduced due to the plug electrode temperature also being high. On both 19EX and the 20/25 HP missing occurred on the pick up with '.030' gaps, being worse on the 20/25 HP. We therefore consider that we experiment forthwith with an ignition coil giving 20% increased voltage to cope with these extraordinary conditions. This should enable us to recommend production to go back to a '.030' plug setting on 20/25 and 40/50 chassis. We also consider that the jumping over length in the H.T. distributor should also be increased. H.E. West. | ||