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).
Tests on the Phantom III engine flywheel to address vibration issues.
| Identifier | ExFiles\Box 91\1\ scan0268 | |
| Date | 16th May 1936 | |
| X300 To E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} 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}7/KW.16.5.36. Phantom III Engine Vibrations. We have been carrying out tests on Phantom III car 36-EX to determine the number of oz/ins. necessary on the flywheel to bring up objectionable engine periods. Tested on an engine free from periods, 1.5 oz/ins. is sufficient to produce a slight period and this is progressive up to 4.8 oz/ins. when the period becomes very objectionable. On the average, we can generally improve a finished Ph.III by adding a small mass to the periphery of the flywheel in the right place, and in view of the small amount of out of balance that can produce a period this is not surprising. This confirms that some provision for finally balancing the flywheel in position is desirable. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||