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).
Increase in the slot depth for an E.A.C. starter motor.
| Identifier | ExFiles\Box 64\1\ scan0160 | |
| Date | 20th October 1923 | |
| To By/Ds. from EFC. S E C R E T X.9620. EFC3/T20.10.23. X.9620. E A.C. STARTER MOTOR. Answering your By/Ds16/H19.10.23. It will be in order to increase the depth of the slot to .520". The slot sizes will then be rather larger than we had arranged for, and the ampere turns required for the armature flux will be rather greater, but this will be compensated by the fact that R.{Sir Henry Royce} has provided for more turns on the field winding than we have allowed. EFC. | ||