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 HP shock absorber valves and the lubrication of grooved springs for the Phantom I.
| Identifier | ExFiles\Box 72\1\ scan0144 | |
| Date | 19th November 1929 | |
| Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 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} v.{VIENNA} to Hs.{Lord Ernest Hives - Chair} C. X8980 X. 8410 X. 8520 X. 8980 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}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 snock 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 Down. 120 One .055 hole in each H.P. valve. Rear. Up. 60 Down. 120 Two .055 holes in each H.P. valve. 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}/Rm.{William Robotham - Chief Engineer} | ||