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).
Experimental results of clutches fitted with untreated and treated cotton fabric.
| Identifier | ExFiles\Box 74\2\ scan0104 | |
| Date | 21th February 1912 | |
| TBB12/L21212. February 21st. 1912. Ref. N2/B9212. Re Clutches. The Experimental Dept. have run a clutch fitted with untreated cotton fabric made in sections, for about 50 miles with satisfactory results. The distance run is really no measure of the amount of work the clutch has done, as of course it has been vigorously slipped during this distance. The first clutch fitted with treated cotton fabric made in one piece is now giving satisfaction, as the preparation has worked out and does not now give trouble from sticking. On the whole the cotton fabric is better than leather for engagement, unless it be compared with a leather clutch which has been disengaged for some period, say, over night, and it will also undoubtedly stand a higher temperature. The clutch cone with the engaging material formed from tape as mentioned in the 3rd paragraph, has not yet been designed, but Mr Bailey will go into this matter as soon as possible. [Handwritten annotations] [Left Margin]: X3J/62 [Pencil]: Can we try this the Renault spring tongues for softer engagement [Ink]: I now understand that our fabric clutches are going ahead well. there has been much inertia on this job FHR | ||