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).
Record of a material wear and friction test, with tabulated results and conclusions.
| Identifier | ExFiles\Box 26\4\ Scan329 | |
| Date | 28th March 1927 | |
| RECORD OF TEST. Time Hour hour Load; lbs. per sq.in. Speed; ft. per min. Temp. at end of run. °C. Coefficient of friction. Max. Min. Mean. 0 to 1 13.6 4480 78 .35 .29 .32 1 to 2 " 4500 79 .36 .32 .36 2 to 3 " 4480 82 .38 .35 .37 3 to 4 " 4500 70 .41 .38 .39 4 to 5 " 4500 80 .40 .38 .39 5 to 6 " 4460 81 .42 .39 .40 13.6 4490 78 .37 CONCLUSIONS. A material showing good resistance to wear with a fairly high coefficient of friction - which rises slowly as wear proceeds. signed C.J. p.p. Director. March 28th., 1927. REF. Eng. Dept. DHQ2/C.J. | ||