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).
Recommending the use of hardened steel washers to reduce noise from spring shackles and front horns.
| Identifier | ExFiles\Box 54\3\ Scan092 | |
| Date | 6th November 1922 | |
| X262F To Da. {Bernard Day - Chassis Design} & BY. {R.W. Bailey - Chief Engineer} from R. {Sir Henry Royce} c. to CJ. BJ. HS. {Lord Ernest Hives - Chair} EP. {G. Eric Platford - Chief Quality Engineer} c. to PN. {Mr Northey} Hm. {Capt. W. Hallam - Head Repairs} Br. {T. E. Bellringer - Repair Manager} OY. R2/M6.11.22. RE. SPRING SHACKLES AND FRONT HORNS X.2628 I understand that increased difficulty is being experienced in keeping these quiet, possibly caused by cord tyres, or changed condition of roads, etc. That copper washers are being used to take up the end play, which do not last long; naturally this may be too soft and also absorbs grit and acts as a lap grinding away the surfaces, hence I recommend the hardest steel washers that are practically glass hard, if thick enough to case-harden, and only temper so as to avoid brittle ones. Possibly a number of thin washers (pen steel) might be even more effective than a single thick washer - both should be carefully tested. Some attempt should be made to protect the rear end of the front springs from road and other water carrying away grease, and the ingress of road grit, such as leather or metal casing. I am aware that it is hardly practical, but let us try. R. {Sir Henry Royce} | ||