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).
Adding a retard ignition timing mark to the flywheel, and omitting the advance mark.
| Identifier | ExFiles\Box 74\3\ scan0214 | |
| Date | 20th August 1919 | |
| R.R. 235 B (200 T) (S.F. 674. 22-5-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2376. X4221 EH. from BY.{R.W. Bailey - Chief Engineer} CR{Mr Cra???ster / Mr Chichester} BY2/P20.8.19. TIMING OF ENGINE MARKING ON FLYWHEEL. X.3520 Referring to your EH3/LG2619, copy of which you recently supplied me with, I find that we have not marked the position for retard or advanced ignition at all on the flywheel. In this particular point we have kept the pre-war practice. I am now therefore adding retard position for ignition, showing same for retard 10° after dead point. In regard to marking the advance position on as well, the Test Department have asked us to omit this - would you kindly discuss the question further with the Test Department. BY.{R.W. Bailey - Chief Engineer} | ||