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).
Proposed adjustments for hydraulic dampers based on road test feedback.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan082 | |
| Date | 14th April 1929 | |
| BY.{R.W. Bailey - Chief Engineer} ) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} ) (At Le CanadelHenry Royce's French residence.) BA. ) R1/M14.4.29. REC'D AT WW. 18.4.29. C. to SG.{Arthur F. Sidgreaves - MD} E.{Mr Elliott - Chief Engineer} re. HYDRAULIC DAMPERS. X235 Thanks to Mr. Bailey for the suggestions in his excellent memo. As he says we may find difficulty to take advantage of them. I blame myself mostly for one wrong action - i.e. that damping should increase with speed and the dynamic passage. For the moment the best we can do I think is to get quick and slow movement the same damping as near as possible and so that the axle can pass quickly over a ridge with small effect on the body (upward damping less than downward) and check the rebound of the body as effectively as we can, and also prevent the axle somewhat falling into a pot-hole. We want nearly 50% more damping than up to the present, (80/60 should be 120/60), and keep to the more flexible rear springs. I have learnt much on these bad roads: sometimes when they appear good they are undulating. R.{Sir Henry Royce} | ||