Best valve and magneto timing for the F.XII engine type test.
| Identifier | ExFiles\Box 33\4\ Scan107 | |
| Date | 21th December 1927 | |
| To EP. {G. Eric Platford - Chief Quality Engineer} from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} X1770 Hs {Lord Ernest Hives - Chair} /Rm {William Robotham - Chief Engineer} 5/LG21.12.27. RR. F.XII VALVE TIMING. X1770 X3866 With reference to BY {R.W. Bailey - Chief Engineer} /CGH {W Clough} /G21.12.27. This is the best valve and magneto timing that we know of. We are certain that it will have to be used for the type test although we do not yet know exactly would drop in revs.per minute it will produce on a 6/1 engine; certainly at the moment there is no alternative. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).