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).
Modifications to strengthen the 'SS' shock damper outer casing following fractures.
| Identifier | ExFiles\Box 16\4\ Scan053 | |
| Date | 1st January 1929 | |
| BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} X7520 DA{Bernard Day - Chassis Design}3/MMO.1.29. c. to BJ. Hs.{Lord Ernest Hives - Chair} 'SS{S. Smith}' SHOCK DAMPER. X.7520 ------------------ X.8772 Herewith we send N.sch.2794 shewing how we suggest the outer casing should be strengthened in view of the fractures that have occurred on the bumping rig and on the road. It will be noticed that we have increased the height of the cover, modifying the shape somewhat. We believe that it will still be oil-tight, and that it can be got off while the damper is in place. The increase of strength is approx. 4 times that of the casing which broke, and casing which broke apparently being (by calculation) 25% stronger than the old Phantom axle control damper. As we mentioned before we noticed that the castings appeared to have a groove in the radius connecting the barrel to the rest of the casing. This we presume is due to the way the pattern is divided, but there seems to be no reason why the moulds should not be properly cleaned up so as to avoid the possibility of a nick there. DA.{Bernard Day - Chassis Design} | ||