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).
Instruction sheet detailing the wear test results for a bone grey fibre rubbing block after a 10,000-mile test.
| Identifier | ExFiles\Box 69\1\ scan0360 | |
| Date | 19th December 1924 | |
| RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X 4646 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.b Order No. Wa{Mr Wallis}99. Customer's No. X 4646 Bone grey fibre rubbing block on 9PK. (First sample) This car has completed a 10,000 miles test in France and the rubbing block made of bone grey fibre has been duly measured to ascertain the wear during the test. The maximum wear was observed to be .007" Signed H.E.W. This Sheet must be filed on completion of the work. | ||