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).
Investigations into engine mounting, body booms, and flywheel issues.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan042 | |
| Date | 13th March 1931 guessed | |
| (3) Ingenious engine mounting, which with modifications in design may be useful. My last words are - let me know if chassis or power units vary. Look to the possibilities of body mounting insulation. HS.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} and EV.{Ivan Evernden - coachwork} will realise that it is no use writing theoretical and irritating differences of opinion any longer upon this subject as I am forced to do, but we must come to some very definite conclusions about this subject. It seems so far as very unsettled as to :- (1) Whether the body booms and noises are worse in P. 2. than P. 1. If so, why? because we have our own P. 1. to compare. (2) Whether bodies are greater boomers than the older ones. (3) Whether comparable chassis such as hispano and bentley are better than we are. (4) If the chassis vary from one to another. (5) If the one fault which I am inclined to admit - ie. the whirling flywheels - actually exists and is the trouble. (6) If the back plate and mounting of the P. 2. flywheel is more flexible than P. 1. There is no need to trouble about this if the flywheel is not to blame. (7) If the crankchamber is stressed more by heavier pins and big ends, and test its running deflection at the speed complained of - 2500 revs. This is a period of the crankchamber. I do not believe for a moment that the combined gearbox has anything to do with it. I do so far believe that we have a whirling flywheel which we ought to find out all about in a few days, and definitely alter to a higher speed than 2500 revs. I do so also believe that if P. 1. is better than P. 2. it is entirely in the better engine mounting of P. 1. for vibration insulation, and it is quite within reach to put an equally good one on P. 2. by simply softer rubber under the feet. Do not mind changing power units or bodies. spend some money and get some definite answers. I cannot believe the job is as mysterious and unsatisfactory to deal with as reports would suggest. Everybody including myself are getting irritable and nervy on this damnable topic. R.{Sir Henry Royce} | ||