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).
Wind noise analysis and remedies for saloon car bodies, detailing the effects of taping various joints and pillars.
| Identifier | ExFiles\Box 160\2\ scan0174 | |
| Date | 20th February 1934 guessed | |
| - 3 - (b) We then taped the trailing edge in a similar way and effected yet another, though slight, improvement. This also stood proud. (c) The taping of the side joints made no appreciable difference. (d) We were then able to appreciate other wind noises which had been drowned previously. The front door shuts, which stood proud of the pillars very badly, were taped when the roar which had been detected at these positions disappeared. (e) A similar roar located at the centre pillar was cured by taping the two door shuts on each pillar. (f) The slots for the direction indicators were covered and then no roar was perceivable at the centre pillar. The total general improvement was estimated to be in the neighbourhood of 70%. A general rush and roar still came from the roof, and the head-lining and outer fabric were in a state of perpetual flutter, due to air passing over the roof, especially at speeds above 40 m.p.h. The roof had insufficient cross battens and the centre fabric was inadequately damped. We could do nothing to alter this. 4-DOOR SALOON - THRUPP & MABERLY - R.45-AE. This was an almost exactly similar body to the previous one. It was as good as the previous one was after that one had been 'doctored'. The Sunshine roof was fitted thus:- [Diagram of a car roof section] PS | ||