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).
Methods for reducing wind noise from doors and sunshine roofs on all car models.
| Identifier | ExFiles\Box 138\1\ scan0288 | |
| Date | 28th January 1938 | |
| 1160, Sg.{Arthur F. Sidgreaves - MD}from Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} HS.{Lord Ernest Hives - Chair} c. to By.{R.W. Bailey - Chief Engineer} c. to Cx.{Major Len W. Cox - Advertising Manager} c. to Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. to Hn.{F. C. Honeyman - Retail orders} WIND NOISES - ALL CARS. The most effective method we know of curing wind noises, is to fit rubber strips to the outer door flange, front, top and rear of each door, in much the same manner as you saw on the Ford V.8. We have found from our tests, that it is only necessary to have rubber taken down to the level top of mudguards. We have used some sorbo material with one side prepared for sticking, having a white canvas backing for protection. This is obtainable in various thicknesses. Some neater means of attaching rubber could no doubt be incorporated, when building new bodies. The sunshine roof is also a great offender with respect to wind noise. Here, American cars score, as in almost every case sunshine roofs are omitted. We have always thought in the past, that providing the leading and rear edges of the sunshine roof matched up, we should be free from wind trouble. However, this is not altogether so, we find that wind noise comes from the sides of the sunshine roof. On 3.B.4. Bentley, we were able to overcome this, as the roof is of different design. There was a metal lip on the roof, and to this we attached a rubber strip 5/32" thick. On the edge of the sunshine roof we fixed fairly stiff rubber draught tubing. This does not prevent the roof from sliding easily, and the two rubbers meet, making a seal when the roof is locked. A further important point to be watched is that the roof drain does not face forward, this mistake has been made on some of our latest bodies. The drain is for the sunshine roof and not the outside lip. 3.B.4. has the water drained down the inside of the screen pillars, this of course does away with the outside outlet entirely, and is a good feature from out point of view. The writer will go into the points mentioned in- continued | ||