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).
Surface failure of gear teeth on a semi-floating axle and requesting hardness testing.
| Identifier | ExFiles\Box 114\1\ scan0149 | |
| Date | 10th September 1938 | |
| 1015 also 402 HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}2/R.10.9.38. SEMI-FLOATING AXLE. We do not yet know the cause of the surface failure of the gear teeth during the first dynamometer run. We are suspicious both of the oil, which had been in the Works since January, and also the original hardness of the gears. Before any new gears are fitted to the axle and before the pair now in 8.B.V. is re-fitted for France, will you please have both the pinion and the crown wheel tested for hardness, and the result stamped somewhere on the pieces, the reason we ask for this is because the gears which failed on the dynamo are now quite soft, but we do not know how hard they started. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||