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).
Modifications to a stiffer engine coupling shaft, with a diagram and notes on engine vibration.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan176 | |
| Date | 4th March 1924 | |
| TO EF. (struck through) HS.{Lord Ernest Hives - Chair}) FROM R.{Sir Henry Royce} Copy to CJ. (struck through) " RG.{Mr Rowledge} (struck through) " DA.{Bernard Day - Chassis Design} (struck through) " BY.{R.W. Bailey - Chief Engineer} (struck through) SECRET R5/M4.3.24. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. 11. STIFFLER ENGINE COUPLING SHAFT ETC. X9550 The arrangement seems quite OK. and your additions to my suggestions quite approved. Could you not bring the oil holes outside, and by boring the tube from one end, thus:- Perhaps .85 or .9 Perhaps .5 Plug here. You might strengthen for the cone thread and oil holes at one end. You will see that if the periods go above the maximum engine revs. a larger flywheel will do no good. The other vibrations one feels seem to be variations of the reactions on the cylinder walls. Lighter parts, and more rigidly or damped engine suspension is the only cure I know. HS.{Lord Ernest Hives - Chair} should prove this. R.{Sir Henry Royce} | ||