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).
Test report on the wear of a bone grey fibre rubbing block after running over 1000 miles.
| Identifier | ExFiles\Box 69\1\ scan0382 | |
| Date | 17th June 1925 | |
| X 4646 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.C. Order No. WB{Mr Brazier/Mr Bell} 21 Customer's No. X 4646 Bone grey fibre rubbing block (2ND Sample) NO T2 off 93NK This lever and rubbing block has run considerably over 1000 mls on 93NK in France and the wear, ascertained from measurements, was found to be .006". The lever and block were also in good condition, this grey fibre apparently wearing very well indeed. Signed H.E.W. This Sheet must be filed on completion of the work. | ||