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).
Effectiveness of hydraulic dampers on Phantom and 20 HP cars, with a suggested design change.
| Identifier | ExFiles\Box 68\2\ scan0207 | |
| Date | 19th February 1928 | |
| Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} DA.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} c. to BJ. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} 48520 R2/M19.2.28. PHANTOM AND 20 HP. X.235 HYDRAULIC DAMPERS. X.5520 X.5520 We are going to considerable cost to fit the above. Are you sure that what we are sending out are effective enough to give the best riding in the back of the cars? My impression is that still we are insufficiently damped, and that we may be getting a bad name by making our passengers sea-sick. I hope I am wrong but I should like to hear of the dampers being fitted with stiffer relief valve springs. Though I am prepared to admit that Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}'s diagrams shew great advantage from the restricted passages I do not agree with trusting to these for effective damping, but I quite agree to working at the idea until we feel we have the best that can be got out of it. If we want a passage where most of the energy is lost kinetically (therefore less dependent on viscosity) we ought to use short passages, as many in series as is practical so that they can be as large as possible (see sketch of suggested design.) Must not be opposite. Perhaps this is the better because it need not be keyed. R.{Sir Henry Royce} | ||