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 to reduce noise from front door edges, gaps, and hinges at various speeds.
Identifier | ExFiles\Box 138\1\ scan0125 | |
Date | 28th February 1935 | |
-2- Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} 22/HW. 28.2.35. (2) The Front Door Edge and Gap Noise starts At 40 m.p.h. and upwards. Test No. 1. The gap of the front door was covered by adhesive tape down to the waist line. The result was 100% cure. Test No. 2. The tape was removed and the gap sealed from the inside. With this condition 25% of the noise was eliminated. Test No. 3. A leading ridge was made on the door post standing proud of the door edge. This was carried down to the waistline. This gave a 75% less noise. Therefore with the door sealed on the inside and a beading on the front door post to the waistline a 100% cure would be obtained. (3) The Hinge & Gap of the Front Doors. Noise starts at 45 m.p.h. and upwards. Test No. 1. Adhesive tape was placed on the gap of the rear of front doors down to the waist line. This eliminated the noise 100%. Test No. 2. The tape was removed and the gap between the door post and door sealed with plasticene approx. one inch from the outer edge. This effected a 95% improvement, leaving 5% noise due to the external gap which could be reduced. | ||