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).
Instruction to experimentally test a 5 1/4 - 1 compression ratio on the P.2 engine with a long duration camshaft.
| Identifier | ExFiles\Box 13\2\ 02-page128 | |
| Date | 6th August 1931 | |
| 87090. Ey. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}/RMA/AD6.8.31. R.{Sir Henry Royce} has instructed on the telephone that he would like us to use 5 1/4 - 1 compression ratio on the P.2. in conjunction with his long duration camshaft. E.{Mr Elliott - Chief Engineer} suggests that we should not need a design from him to try this out experimentally and we should be obliged therefore if you will see whether this can be obtained on the existing head without running into difficulties. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||