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).
Requesting changes to valve timing and piston rings for a Per.II No.4 unit due to overoiling.
| Identifier | ExFiles\Box 169\4\ img160 | |
| Date | 22th May 1933 | |
| P.W. RHC.{R. H. Coverley - Production Engineer} From Ha/Mtths. Ha/Mtths.3/MA.22.5.33. Per.II No.4 UNIT. Will you please make Valve Timing 1 tooth earlier, the timing should be - I.O 1° A.T.D.C. E.C. 1° B.T.D.C. This unit is overoiling badly, will you please correct and fit Hs.{Lord Ernest Hives - Chair}945 Scraper Rings and Hs.{Lord Ernest Hives - Chair}949 Gas Ring above Scraper Rings as on Per.II No.5 unit. Ha/R.Matthews. | ||