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).
Findings and suggestions for improving spring shackles and front horns.
| Identifier | WestWitteringFiles\H\April1922\ Scan25 | |
| Date | 19th April 1922 guessed | |
| (2) soft surface will get charged with sand and act as a lap quick- ly wearing the hard surface opposed to it. SPRING SHACKLES. I found that these were not so much a case of wear as imperfect fitting up; the side play needs to be reduced to the smallest amount i.e. only a few thousandths. In addition to this a loose case hardened washer should be fitted between every pair of faces: this washer should be larger than either of the surfaces so as to allow another being fitted without there being any ridges to inter- fere with the fitting, and require slow and difficult removing. The surfaces should stand out to make this effective and com- plete. I have said in a previous report we should try case- hardened bushes with large faces pressed into the springs. RE FRONT HORNS. I think it is rather a pity we did not follow our old practice as used by the Fiat, but the vertical long rivet with us was not a success, and a bolt spoils the simplicity of the work. Suppose instead of adding 30% we only add 15% and by bringing the bolts a little more away from the end we might use short rivets only, which I believe is the corr- ect practice, the long rivet and with faces which are not parallel cannot be really good. There are many good cars with dumb irons of the pattern we have adopted on Goshawk 11. which are rivetted, hot or cold I do not know. E.{Mr Elliott - Chief Engineer} also has sent to Derby other schemes for trial before I left but I have not seen any of these. | ||