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).
Tests on a Park Ward Bentley body to investigate and resolve sources of wind noise.
| Identifier | ExFiles\Box 138\1\ scan0124 | |
| Date | 28th February 1936 | |
| 4634 To Eg. A Wor.{Arthur Wormald - General Works Manager} c.c. to E.{Mr Elliott - Chief Engineer} c.c. to HY.{Tom Haldenby - Plant Engineer} c.c. to EV.{Ivan Evernden - coachwork} c.c. to Hn.{F. C. Honeyman - Retail orders} HS{Lord Ernest Hives - Chair}/CWH.22/KW.28.2.36. B-B-IV. Park Ward Body - Bentley Tests Taken for Wind Noises. The primary units of the wind noises are placed in the following order :- (1) Front edge of sliding roof (35 m.p.h. and upwards). (2) The front door edge and gap. (3) The hinge and gap of the front doors. (4) Front ventilating windows. Test No. 1 - Front Edge of Sliding Roof. The gap at the front edge of the sliding roof was covered over with adhesive tape. The result was a 100% cure. Test No. 2. The adhesive tape was removed and a beading made of plasticene was formed as a ridge in front of the gap to get the effect of streamline. This gave no improvement. Test No. 3. The beading was removed and adhesive tape stretched across the gap, but leaving the back edge in line with the back edge of the gap, the idea being to reduce the gap. The result was, the tape was pulled upwards, showing that air was being drawn out of the body through the gap and no better result was obtained. Test No. 4. Adhesive tape removed. A seal was made with plasticene along the front edge, sealing the joint but leaving the gap as before. The result was 75% less noise, proving that the cause was air being drawn out of the body at this point. The remaining 25% would be cured by lessening the width of the gap. | ||