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).
Progress report on an investigation into cylinder block vibration on 'Vulture' engines, concluding that rearranging the articulated connecting rod system reduces vibration amplitude.
| Identifier | ExFiles\Box 138\2\ scan0155 | |
| Date | 27th August 1938 | |
| R.R. 306. 5T. 50966. 6/11/37. C.E. 1163 EXPERIMENTAL DEPARTMENT REPORT REFERENCE:- Lr{Mr Ellor}/HWS.3/WJ.27.8.38. Subject of Report:- Progress Report - Investigation of cylinder block vibration on 'Vulture' engines - employing the 'Askania' vibrograph. General Conclusion:- The effect produced by the rearrangement of the articulated connecting rod system has been studied, and it is shown that a useful reduction in the amplitude of the main cylinder block vibration has been obtained by this means. The rearrangement is effected by changing the position of the master rod relative to the pairs of cylinder blocks tied together by the induction system. (It is desired to emphasise the distinction between the main cylinder block vibration which has been held responsible for the failure of water connections etc. on the upper banks and separate troubles which are associated with torsional oscillations in the camshafts. It is to this latter effect that the repeated failures of valve springs are attributed and this is the subject of a separate investigation. Copies of Report Circulated to:- E.{Mr Elliott - Chief Engineer} Bn.{W.O. Bentley / Mr Barrington} Lr.{Mr Ellor} Lov.{Mr Lovesey} Rm.{William Robotham - Chief Engineer} Report to be noted for further action by:- Test carried out on:- By:- Test No. Date:- | ||