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).
Overrun vibration, the solution of a thicker shaft, and the effects of a heavier flywheel.
| Identifier | ExFiles\Box 74\4\ scan0112 | |
| Date | 29th February 1924 | |
| To E.{Mr Elliott - Chief Engineer} from R.{Sir Henry Royce} c. to CJ. RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} X4604 R6/M29.2.24. 150 OVERRUN VIBRATION. X.4604 X.9550 X.9040 The thicker shaft looks good and should push the period well up out of the way if what we think is right. Do not trouble about heavier flywheel . It will not be wanted for this period and would only alter its intensity It will do no good for the vibrations which are felt from the pistons. These would be improved by reducing their weight and by improving the engine suspension so that flywheel is no good unless we strike a period. R.{Sir Henry Royce} | ||