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).
Modifications and performance improvements for the Phantom III Dynamo.
| Identifier | ExFiles\Box 168a\3\ img323 | |
| Date | 6th October 1936 | |
| COPY. To By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.1/JH.6.10.36. Phantom 111 Dynamo with Improved Brush Gear and 36 Slot Armature. Preliminary bench tests carried out on this dynamo have given results considerably better than the standard machine, but we have improved the performance even more so by :- (a) Rewinding the armature with 2 turns per coil of 19 S.W.G. (b) Increasing the air gap by .005". We would now like another dynamo instructing embodying these modifications by reducing the armature diameter consistent with the reduction in slot depth caused by only winding 2 turns per coil, and increasing theavailable field winding space accordingly by lengthening the pole core and possibly increasing the pole face thickness. Will you please arrange to instruct accordingly. We propose issuing a full report on the performance of this new dynamo when bench endurance tests have been completed. Hs{Lord Ernest Hives - Chair}/Wst. | ||