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).
The adoption of drilled HP shock absorber valves and lubrication of Phantom I springs with grooves.
| Identifier | ExFiles\Box 68\2\ scan0253 | |
| Date | 19th November 1929 | |
| Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. R.{Sir Henry Royce} Wor.{Arthur Wormald - General Works Manager} c. to Rg.{Mr Rowledge} Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} c. to E.{Mr Elliott - Chief Engineer} PN.{Mr Northey} c. to Hs.{Lord Ernest Hives - Chair} C. X8520. X. 8410 X. 8520 X. 8980 Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}3/AD19.11.29. Adoption of drilled H.P. shock absorber valves and lubrication of Phantom I springs with grooves. We have been working in conjunction with the Repair Dept. on this problem. We find that the lubricated springs alone are not a complete cure. Unless we fit the American setting for shock absorbers in conjunction with these springs, we do not get the best results. We have tried a great number of loadings and have come to the conclusion that for the average heavy closed car driven at slow speeds the best loadings are - Front Up. 120 One .055 hole in each H.P. valve. Down. 120 Rear. Up. 60 Two .055 holes in each H.P. valve. Down. 120 The main leaf and the two longest subsidiary leaves are drilled and grooved for lubrication as on Phantom ll. The most difficult cars to deal with are light fabric bodies of maximum capacity. A full petrol tank and the equivalent weight of a spare wheel at the rear is the best condition we know of. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||