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).
Performance, testing, and potential hardening processes for timing gears.
| Identifier | ExFiles\Box 136\1\ scan0093 | |
| Date | 21th September 1933 | |
| To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KT.21.9.33. TIMING GEARS. The timing gears on B.6. were very encouraging. The small quantity of whine present might easily be entirely attributable to the small amount of distortion which cannot be eliminated with unground gears. We understand that you have the pitch blocks for the grinding of gears excepting the dynamo pinion, and that we could with advantage test the next set with all gears ground except this dynamo pinion which could be left soft. We find it most difficult to get an accurate impression of the bedding of the gears from the amount of running we do on the test bed. We cannot really distinguish which is bedding from the lap rig and which is from our running on the test bed. If you could copper plate these gears when you run them on the rig and get a bedding which you could record, and then re-copper plate them and examine them when they have been running on the engine, it would at least yield valuable information in that we should know whether the bedding of a good set of silent gears correspond with our theoretical anticipations. If the set of ground gears prove a success we shall at once take an interest in Cyanide hardening. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||