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).
Ignition timing issues on the Peregrine car with a non-turbulent head and recommending alterations to the control leverages.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page058 | |
| Date | 21th November 1932 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c.c. RV X4057. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}16/AD21.11.32. The Peregrine car running in France has a non-turbulent head. It is therefore likely to require the greatest range of ignition control of anything we are likely to standardise. We found that one notch on the quadrant represents approximately 1° on the flywheel. Our normal timing is 16° before top dead centre. Therefore the full range of the hand control brings us to about 12° after top dead centre which is ridiculously late. Furthermore the 4 or 5 notches causes such a sudden drop in power that one hardly dares to use the ignition hand control. We recommend that the leverages should be altered to give a more reasonable result. X4057. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||