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).
Spark plug pre-ignition and standardizing new stepped insulator K.L.G. plugs for the 20 HP model.
| Identifier | ExFiles\Box 47\2\ Scan263 | |
| Date | 5th May 1930 | |
| To C. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X4117 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/MJ.5.5.30. With reference to C.4/030.4.30. We have examined the plugs. We consider that they may have been pre-igniting. We have just standardised a new plug for the 20 HP, in view of the fact that we believe we are rather closer to pre-ignition than is altogether desirable. We suggest that Dr. Thompson should be supplied with a set of the new stepped insulator K.L.G. plugs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||