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).
Tests of intermediate levers for hydraulic shock absorbers, with findings and recommendations.
| Identifier | ExFiles\Box 151\2\ scan0046 | |
| Date | 27th March 1933 | |
| X235 from ns {Norman Scott} /Rm. {William Robotham - Chief Engineer} e. {Mr Elliott - Chief Engineer} to H. {Arthur M. Hanbury - Head Complaints} Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 5/KT.27.3.33. INTERMEDIATE LEVERS - HYDRAULIC SHOCK ABSORBERS. We have carried out a lot of tests on these intermediate levers with a view to ascertaining whether, without a definite alteration in design, we can improve the fixing of these levers. We attach the results so far obtained. Generally speaking it seems that the results indicate:- (1) That the drilled bolt is of no advantage. (2) That the lever to F.100884 does not give us sufficient improvement to be worth risking fitting it until we have done further running to prove its mechanical strength. (3) We have not been able to gain anything by using the lever with the undersized bore. We therefore recommend that the first lot of J.III shock absorbers should be put through with the solid bolt and lever to F.59294, and we will at the same time push forward with the square section lever with a view to a 10,000 miles test at the first possible moment. We have the satisfaction in knowing that the last PeregrineExperimental Bentley car never produced / Aero Engine levers to F.100884 were perfectly satisfactory at the end of the 10,000 miles test just completed. Generally speaking, most [struck through] all [handwritten] broken lever shafts we have had on the road have occurred when, (a) we have been using the automatic damper control, which produces much higher ball pin loads than we are proposing to use on the first production dampers, (b) when the dampers have been short of oil due to various gland experiments. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||