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).
Motor design alterations, efficiency calculations regarding teaser windings, and experiments on the Phantom starter motor.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan145 | |
| Date | 27th November 1926 | |
| Contd. -2- EFC1/T27.11.26. copies of our calculations in this connection sometime early next week. We do not at the moment see any reason for any other alteration to the design of the motor than the one stated: One reason for the efficiency being rather less is the fact that the teazer winding occupies some of the space that would normally be occupied by a conductor of heavier section. It is necessary therefore to counteract this by having the number of turns say 1 smaller, than would otherwise be the case. EFC. You will remember that we have made comparisons of the starter motor with four field coils in series, and then re-arranged two series two parallel, and we are looking into the possibility of doing this as an experiment on the present Phantom motor. EFC. | ||