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).
Technical notes discussing suspension characteristics including understeer, propeller shaft movement, and rear spring shackle design.
| Identifier | ExFiles\Box 161a\1\ scan0121 | |
| Date | 10th January 1939 | |
| [Handwritten top middle] mr [Handwritten top right] To MR HTM .S To MR OAC .S To MR CH .S To MR SD .S To MR WLV .S [Typed text] Cont'd.{John DeLooze - Company Secretary} a.{Mr Adams} .550 ins. prop. shaft pumping on max. bump. b. 4.7% understeer under full load. c. Zero understeer with 2 up in front seat, assuming .875 in. deflection for the removal of the rear two passengers. 9. The front end of the rear spring, being under the frame, is virtually a fixed limitation. The height of the rear eye is controlled by quantities outlined in '8'. It is impossible to provide a tension shackle of reasonable length to approx. the constant periodicity with varying load without imperilling the ground clearance. It was agreed to use a long compression shackle which will give equivalent results and provide an easier and - lighter construction. 10. Rm{William Robotham - Chief Engineer}/GB. will go ahead with projects of the front and rear spring fixings of the rear springs so that we can determine the shape of the frame side member. | ||