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 roughness at high speeds in 20 HP and 40/50 HP models, recommending a trial of the balanced crankshaft.
| Identifier | ExFiles\Box 25\3\ Scan355 | |
| Date | 13th November 1928 | |
| To R: from Hs{Lord Ernest Hives - Chair}: c. to B.J. Nor. c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} X634 Hs{Lord Ernest Hives - Chair}5/LG13.11.28. ENGINE ROUGHNESS AT HIGH SPEEDS. We are not satisfied with the engine smoothness at high speed either on the 20 HP. or the 40/50 HP. If we adopt any of the schemes for an easy change into the third speed, this trouble will be more acute. We recommend we try again the balanced crankshaft. Hs.{Lord Ernest Hives - Chair} | ||