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).
Shock absorber loads, discussing issues with hydraulic dampers and recommending a change in machining to a reamer finish.
| Identifier | ExFiles\Box 55\4\ Scan388 | |
| Date | 29th November 1929 | |
| X.233. 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/AD29.11.29. SHOCK ABSORBER LOADS We are trying to get the Hydraulic Damper setting down to the position where a washer of any given size under the valve cap will give a definite load. So far Mr.Brock is obtaining most encouraging results by ensuring that the working length of the spring is O.K. in every case, but there is still one variable in machining which we think should be eliminated. .312 + 5 The counter-bore under the valve seat, which dictates the area exposed to the oil pressure of the cylinder, has a +5 limit. This can cause a 4% variation in load. We recommend that this bore should be reamer instead of drill finished. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||