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).
Buffer clearance variations and potential solutions for the Phantom III independent front suspension.
| Identifier | ExFiles\Box 95\2\ scan0089 | |
| Date | 26th June 1936 | |
| x 346 Rm{William Robotham - Chief Engineer} Les You are going to follow this up with the spring manufacturer Rm{William Robotham - Chief Engineer} BT.{Capt. J. S. Burt - Engineer} c. Hs.{Lord Ernest Hives - Chair} Sft.{Mr Swift} Wx. JLE.{J. Lee Evans - Chassis Test Manager} Da.{Bernard Day - Chassis Design} -E/EV.{Ivan Evernden - coachwork} Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} Phantom III - Independent Front Suspension. Variation of buffer clearance is experienced with different Phantom III cars using the same front springs, and it appears necessary to have some means of adjusting buffer clearance to normal. With the present springs and mechanism we can use up to .2 thickness of packing, and we should be glad if some suitable packings could be instructed to be available for production cars. As however in the most extreme cases this is not sufficient we ought also to have some of the present springs made with a greater free length. This of course means that on the full bump the maximum stress will be greater. As this condition only arises with the larger heavier bodies such as full size limousines which will not be driven as fast as the lighter close coupled types, we do not think it is serious. Some of the loss of buffer clearance may arise from the settling down of the springs, and in this connection we should like to ensure that springs have been settled before being put into production. E.{Mr Elliott - Chief Engineer} | ||