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).
Fitting Ceapak soundproofing to sheet metal dashboards B.5 and B.50.
| Identifier | ExFiles\Box 132\3\ scan0190 | |
| Date | 21th February 1939 | |
| 820 also 420 1125 To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} c. to Da{Bernard Day - Chassis Design}/RV. c. to By/RD. c. to By/HEB.{H. Biraben} c. to By/NG. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}1/JH.21.2.39. Sheet Metal Dashboards B.5. B.50. The question of silence in our bodies is of first importance, and it is only after a long struggle that our present standard has been obtained by the use of Ceapak. To obtain this degree of silence it is necessary to bed up the Ceapak tight to the dashboard, any objects or parts bolted to the back of the dashboard must therefore be let into the Ceapak, obviously reducing the thickness locally. With the sheet metal dashboard as fitted to B.5. and B.50 the fitting of the Ceapak is of greater importance. Unfortunately, we find that instead of being considered early in the dashboard design it is now the last. All parts including wiring tubes and wiring, previously fitted on the engine side of the aluminium dashboard, are now being placed on the back of the sheet metal board, with no consideration for the fitting of the Ceapak, making it impossible to obtain the required thickness and fit in position. We think it essential that the wiring should be moved to the engine side of the dashboard to enable us to get our required degree of silence. Will you please also have the stiffening ribs pressed out in the opposite direction so that the flat part of the dash is next to the Ceapak, at present the ribs hold the Ceapak off the dash to the depth of the rib. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||