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).
Plans for endurance testing of high lead content lead bronze bearings against white metal and cadmium bearings.
| Identifier | ExFiles\Box 114\2\ scan0169 | |
| Date | 12th June 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} L.1020 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} S/KW.12.6.35. High Lead Content Lead Bronze Bearings running with White Metal Clearances. In view of the fact that these indicate that they may be superior to white metal for main bearings under extreme load conditions, we should like you to put 3 sets in hand and we will carry out some endurance running. One set we should like to replace the white metal bearings in B-1. Will you please fit them up with the grooves in the intermediate bearings, and of course the standard lead bronze. We should like a second set preparing for B-9 unit, where we will give them a severe endurance test with the 9 to 1 cylinder head. We think all these grooves in the intermediates should be not less than 1/10" wide or they will fill up. If the tests on the other two are successful we may fit the third set to B-11, the unit in Hall's car should the white metal mains fail on endurance. We do want to run some tests on the high cadmium bearings on the piston unit engine, to get comparisons with the lead bronze. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||