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).
Material wear dimensions after a 10,000-mile test.
| Identifier | ExFiles\Box 69\1\ scan0344 | |
| Date | 9th July 1923 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (SH57-28-6-20.) MP 224358 To Order No. W.A. 63 (2) Customer's No. Dimensions after 10,000 miles. top .253" middle .254" bottom .255" Maximum amount of wear = .002" This is much better than the results obtained with bakelite and other samples of grey fibre under same conditions. (see EFC1 | T 9.7.23) Signed H.E.W. This Sheet must be filed on completion of the work. | ||