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).
Proposal to test extra cylinder lubrication to address piston knock under light load.
| Identifier | Morton\M11\ img206 | |
| Date | 1st September 1919 | |
| To. FH. from R.{Sir Henry Royce} Copy to EF. " EFC. RE EXTRA LUBRICATION. X.343Y X.2Y48 I propose testing 1 EX. with the extra cylinder lubricating oil always on. I shall be glad if you will make a similar test on another car, and see whether it is possible to permit cylinders to have more oil during the conditions of light load, when the piston knocks are most noticeable. R.{Sir Henry Royce} | ||