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).
Electrical experimental record sheet for the testing of a bone grey fibre rubbing block.
| Identifier | ExFiles\Box 69\1\ scan0368 | |
| Date | 14th May 1924 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. X 4646 Bone grey fibre rubbing Block. (1st Sample) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. 2-6-24 | Lab. | 15-7-24 | Fitted to lever on Distributor in lab run the equivalent of 10,000 mls on the bench rig. (Lubricated) Dimensions before running Top .255" Middle .256" Bottom .267" after .253 .254 .265 | | | | 10,000 14-8-24 | Lab. | | Run another 10,000 mls unlubricated. Dimensions Before Top .253 middle .254 bottom .255 After Top .253 middle .254 bottom .255 | | | | 20,000 14.5.24. (vertically on right) X.4646 | ||