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).
Brief report on development work to overcome scuttle shake on the 10.B.V. model.
| Identifier | ExFiles\Box 98\1\ scan0269 | |
| Date | 19th February 1940 | |
| 404 To Rm{William Robotham - Chief Engineer}/MD. c. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham}12/ML.19.2.40. Scuttle Shake. on 10.B.V. [Handwritten and struck-through: 79H] The following is a brief report of the development work carried out last May to try and overcome scuttle shake on 10.B.V. Initially a strut was put in high up behind the fascia board and diagonal struts were attached to the centre of this strut and to the screen pillars at their other ends about 8" off the floor. This produced no improvement at all. The next step was a large diagonal strut right across the body in the plane of the dashboard from the floor on one side to just below the windscreen on the other. This stopped the shake completely and proved that the trouble was parallelogramming of the screen pillars. Being impracticable, however, it had to be removed again. The next step was to increase the effective width of the screen pillars with struts from the inside of the body runner to the door striking plate. This did strengthen it up considerably inasmuch as the frequency of the shake was increased considerably but not overcome. While the car was in this condition the doors were removed and the shake's frequency went up again but it still shook. We next attacked the problem from a slightly different angle and tried to increase the fore and aft rigidity. To this end the door latches were mounted solidly instead of on rubber and fore and aft parallel struts were run from the top of the tin dash to the sides of the frame beside the front shock dampers. There was no improvement. The car was then sent down to Park Ward's for a strengthened scuttle arch to be fitted, and no further development work was carried out. The torsional stiffness of the whole car was originally only 1950 lbs.ft/degree. Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} | ||