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).
Instruction to modify a 20/25 HP Dynamo by winding it with a dummy coil to improve commutation.
| Identifier | ExFiles\Box 62\3\ scan0398 | |
| Date | 18th October 1933 | |
| r6037 Hs{Lord Ernest Hives - Chair}/Wst. BY/RD4/W.18.10.33. We have to-day instructed a 20/25 H.P. Dynamo to be wound with a dummy coil in place of a lap coil, to improve commutation. Will you please have this tested and make the usual report. BY/RD. | ||