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).
Loss of 3HP at top speeds due to the longer cylinder barrel used for Bentley Pistons.
| Identifier | ExFiles\Box 86\2\ scan0042 | |
| Date | 25th August 1933 | |
| X236. E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} c. to Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MA.25.8.33. BENTLEY PISTONS. Referring to E.1/HP.24.8.33., we have now made four or five confirmatory tests and it is certain that we loose about 3HP. at the top speeds through the longer cylinder barrel. For this reason we think it is unfortunate that piston leC.3493 requires this arrangement. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||