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).
Experimental 'SS' engine mountings, detailing tests with different rubber feet and packing to reduce movement.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan171 | |
| Date | 8th March 1929 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Sp.{Mr Spinney} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to M.{Mr Moon / Mr Moore} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG8;3.29. 'SS{S. Smith}' ENGINE MOUNTING. We have had E.{Mr Elliott - Chief Engineer} and DA{Bernard Day - Chassis Design}: at the Works for the past week and have been concentrating on engine mountings. It will be remembered that in our last report on this subject Hs{Lord Ernest Hives - Chair}/RmL/LG8.2.29. we estimated that we had effect 80% improvement in the radiator movement of 18-EX by means of the experimental rubber engine feet. The remaining 20% of movement however, could only be eliminated by single point mounting the body and reducing the rigidity of the cross, both rather undesirable moves. We had hoped that with a well designed foot on the experimental lines we should have been able to eliminate this 20% of movement without altering any other part of the car. Our first test on the LeC.2649 rubber feet were not successful (Hs{Lord Ernest Hives - Chair}3/LG19.2.29) These feet were fitted up with flexible rubber packing. We then decreased the thickness of the strip rubber to .100 and used hard rubber. The result was still inferior to the experimental feet but an improvement over the flexible rubber. We then increased the thickness of the metal plates to .250 as there was evidence of considerable local distortion with the plates .150 thick. This effected a further improvement but we still felt that we had not attained the results produced by our experimental foot which took hold of the top and bottom of the frame channel. contd :- | ||