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).
Modifications to prevent noise and heat conduction through the floor and pedal area.
| Identifier | ExFiles\Box 136\5\ scan0034 | |
| Date | 18th January 1924 | |
| Oy2-E-11824 -2- January 18, 1924. Items 1 and 2. Items 1 and 2 are important we find in preventing noise as well as heat, in fact they are used both in front and rear (and the cork under the rear cushions) to prevent noise. Even though it is proved that the cork makes little difference in the general heat of the cowl we believe it has a considerable effect in preventing conduction of heat through the floor to the feet of the front passengers. The one piece rubber mat closes any chance cracks in the floorboard joints and prevents accidental contact between the feet and the aluminum pedal plate which is always very hot. Items 3 and 4. On Items 3 and 4 we are still awaiting advice from England. Our own impression is that they are both extremely necessary. We think that the problem is really two, namely (1) To reduce the general heat and (2) to avoid metallic surfaces touching the feet. (For instance the insulation of the whole dashboard we suggest is unnecessary so long as that part which is liable to touch the feet is covered with heat insulating material. We notice that the cowl under the pedals was tested after the pedal slots had been reduced. It would be interesting to learn what is the effect of the cowl without the closed pedal slots. Our rough test goes to show that with the cowl the closed pedal slots are scarcely necessary, but that it is still necessary to avoid contact with metal surfaces since these all get hot by conduction. We suggest that closing the pedal slots on existing cars is scarcely practicable, since besides reducing the stroke it makes the angle of the pedals less convenient to the feet and increases the reach, and if the sloping floorboard were raised to bring the pedals square with the feet, the upper end of the sloping board is half way up the dashboard. We did close the slots on one B steering car, to suit a customer, but in this case we had to lengthen the shanks of the pedals and put a slight bend in the clutch pedal lever to clear the flywheel. Oy. M.{Mr Moon / Mr Moore} Olley MO/E | ||