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).
Letter addressing issues with an exhaust system downtake pipe and a clicking accelerator pedal, proposing solutions.
| Identifier | ExFiles\Box 108\3\ scan0122 | |
| Date | 3rd March 1938 | |
| 600a also 654 I.M. Waller, Hotel de France, Chateauroux, Indre, FRANCE. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}1/JH.3.3.38. 26.6.VI. - 25/30 H.P. I have received your reports re breaking of exhaust system downtake pipe, and clicking of accelerator pedal. With regard to the exhaust downtake pipe, we have instructed staybright for production cars although we are sorry the nickel plated mild steel has broken down. The trouble with the accelerator pedal is an old one with us, but not very easy to overcome, with a flexible engine, however we have again co-opted design on the job and hope to improve this particular point. We do not like the idea of a rubber stop on the fully open position of the pedal because of its elasticity and consequent varying of the fully open throttle position, and if we can cure the trouble by improved geometry of the controls if will be better than camouflaging a fault with rubber. I am sending you to-day a scheme of Da{Bernard Day - Chassis Design}'s. for taking the engine torque and controlling the sideways movement. The parts have been made to a sketch only, and we have left the drilling of the holes to you to fit your own car. The rubbers can easily be cut to fit the cups, although you may find them a little on the thick side, in which case we suggest you cut them down to 1.500" thick and run with .125" compression on them. The durometer hardness of the rubbers is 50° - 55°. The drawing number is GOD.517 and a similar mock-up on 29.G.VI is working very well. Please note that we do not anticipate that even these rubbers will cure the knocks and rattles from change speed lever, that part of the job has been successfully dealt with by the new fully isolated lever. Enclosed print. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||