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).
Spring load adjustments and frictional tightness for the 40/50 HP rear hydraulic dampers.
| Identifier | ExFiles\Box 68\2\ scan0191 | |
| Date | 27th May 1927 | |
| (Handwritten: X8520) To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG27.5.27. 40/50 HP. REAR HYDRAULIC DAMPERS. (Handwritten: X235) The introduction of the .024" air leak has made the pressures obtained with spring F.75168 on the low pressure of the 40/50 rear damper somewhat light. Will you please instruct that spring F.75169 should be used and that a load of 58 + 5 lbs. should be obtained when setting with the air leak blocked up. We have observed that on production they habitually get higher loads with the same springs than we do. We suggest that this is possibly due to the initial tightness of all the parts on the shock absorber. We consider that it would be advisable to get out a figure for the frictional load which is generally obtained on production dampers and that this should be added on the drawing, otherwise, when running the damper will be on the low side. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||