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).
The testing of various springs for EAC & Goshawk front shock absorbers.
| Identifier | ExFiles\Box 68\2\ scan0108 | |
| Date | 26th November 1925 | |
| X8520 To Hs{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer} RHC{R. H. Coverley - Production Engineer}12/BE. 26.11.25. RE EAC & GOSHAWK FRONT SHOCK ABSORBERS In our last report RHC{R. H. Coverley - Production Engineer}1/BE. 1.10.25. on Shock Absorbers we stated that we were of the opinion that, providing Standard Springs were made in better material which would not take permanent set under load, they would give the increased load required on Shock Absorbers. New Springs in Chrome Venadium Steel have been obtained and tested but they fail to give the required load. In some cases we could obtain the necessary load but the results vary so much that it would not be policy to proceed. The increased load asked for on EAC is 50 lbs. The best average result we obtained with the improved Spring was 41.75 lbs. We have now tested some of the new Springs F.73737 instructed by Mr. Bailey which gives the 50 lbs load required when compressed .300. It is possible with these Springs to obtain a load on Shock Absorbers of 63 lbs. The only point which arises now is whether Shock Absorber leathers will give reasonable service under the increased spring load. With reference to the Goshawk Shock Absorbers. We also obtained standard springs F.51535 in better material and tested same. We found it was possible to just get the increase in load required but Springs were almost choc-a-bloc, so it would therefore appear that in this case also, it would be policy to fit the new F.53835 Springs instructed by Mr. Bailey which gives us the increase in load when compressed .225. The maximum load which can be obtained is 60 lbs. Particulars of Springs and Shock Absorber loads attached. RHC.{R. H. Coverley - Production Engineer} | ||