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).
Testing and rectifying wind noises from the sunshine roof and doors on a Standardised Bentley Saloon.
| Identifier | ExFiles\Box 160\2\ scan0181 | |
| Date | 22th February 1934 | |
| [Handwritten: X4578] [Struck through text] copy to Mr. [illegible] Mr. Hives. Mr. L.H.S.{Lord Herbert Scott - Chair} [End struck through text] KVB/IM.22.2.34. re:- WIND NOISES IN CARS. Further to our KVl/IM.20.2.34., we are now able to report that we have tested the Standardised Bentley Saloon by Messrs. Park Ward & Co. - H.127-AR. This has proved to be a distinctly bad example of a car with wind noises. By taping the leading edge of the sunshine roof (it was a poor fit) we cured approximately 50% of the noise. There still remained some noise coming from that vicinity, which we subsequently cured by filling up and fairing off the outlet drains to the sunshine roof. Taping the side joints of the Sunshine roof in this case effected an improvement, as also did taping the rear edge. The total improvement of these cures was considered to be in the neighbourhood of 70%. The door shuts were very good on this particular car, but could be made bad by opening the door by a very small fraction of an inch, thereby indicating that with sharp edges to the pillar and door, it is largely by good fortune that no noise occurs at this source. The same remark applies to some extent to the leading edge of the sunshine roof. Noticing that the General Motors policy on the Vauxhall is to have a rubber bead standing proud of the leading edge of the sunshine roof, we decided to build a similar ledge on this car in plasticine. We found this to be as effective as taping the leading edge and it had the advantage that the forward edge of the sliding member of the roof could be raised and lowered over a considerable range before a position was arrived at which it would cause a whistle. There is no doubt that from a practical point of view, this is the cheapest and easiest way of making certain that the joint will | ||