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).
Requirements and modifications for governor-controlled shock dampers on the 22-EX chassis.
| Identifier | ExFiles\Box 16\5\ Scan121 | |
| Date | 12th October 1933 | |
| x7520 To RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} Hs{Lord Ernest Hives - Chair}/Les.1/KT.12.10.33. GOVERNOR CONTROLLED SHOCK DAMPERS. We are satisfied that the present arrangement of controllable dampers on 22-EX is the best we have tried. This arrangement would be a very definite improvement on our existing fixed load dampers. We therefore are anxious that the production chassis should have this feature. The results have been obtained on 22-EX by using certain expl. parts. We now want these replacing by parts which can be used on production. The following parts are now required :- Valve Chamber. This should be to Hs.{Lord Ernest Hives - Chair}1165. The existing valve chamber casting from R.R.Sch.411 is used, but the drilling is different. The double valve is new, and a higher rating valve spring. The remaining parts of R.R.Sch.411 are unaltered. Governor Unit. We have never tested the latest unit which contains a safety release valve for preventing overloading the bellows. On both Sg{Arthur F. Sidgreaves - MD}'s car and 22-EX, we have had to make an expl. main release valve. The latest casting of the unit has been altered so that a double area pump can be fitted, but the details of the double area pump have only been issued to the Expl. Dept. We should like the double area pump on 22-EX. Rear Damper Connecting Tubes. We find the spring load in the connecting tube is not sufficient to deal with the high damper loads which we are using in the maximum position. Will you therefore modify the connecting tube links to BY/HEB{H. Biraben}1/M.4.10.33. which increases the spring load from 300 lbs. to 500 lbs. | ||