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).
Updated settings and modifications for hydraulic shock dampers following tests in France.
| Identifier | ExFiles\Box 55\3\ Scan250 | |
| Date | 15th September 1926 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X235 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}4/LG15.9.26. HYDRAULIC SHOCK DAMPERS. X235 X7520 As a result of our recent tests in France, we have decided that the best setting for the front shock dampers is 40 lbs. load upwards and 80 lbs. load downwards. Will you please instruct the Works to bring in this modification as soon as convenient. Also we should like you to consider reducing the diameters of the air vent on the low pressure side still further to avoid the possibility of the load varying on the low pressure side when very thin oil is used. We have also proved as a result of the last 10,000 miles test that the breather can be dispensed with in the top cap. We suggest that this is blocked up on the dampers being fitted to cars as it eliminates the chance of air getting in if the damper is left lying about after being filled, otherwise, its presence is immaterial. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||