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).
Engine performance limitations due to detonations and vibrations at a specific compression ratio.
| Identifier | ExFiles\Box 69\4\ scan0329 | |
| Date | 9th November 1926 | |
| To Hs.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} from R.{Sir Henry Royce} c. to BJ. Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} X8771 R2/M9.11.26. BETTER MEP. AT ALL SPEEDS UP TO 3000 RPM. X.8771 AND 4¾ COMPRESSION RATIO. X.634 X.8005 This cannot be increased because of detonations and reaction vibrations. However, corrected auto ignition - (i.e. excessive and suitably timed advance:auto) can be made to eliminate moderate detonations, and minimise torque reactions. R.{Sir Henry Royce} | ||