Diagram of a Rotax A.T. 12. Dynamo showing windings, poles, brushes, and terminals.
| Identifier | WestWitteringFiles\E\November1920\ Scan59 | |
| Date | 29th October 1920 | |
| ROTAX A.T. 12. DYNAMO - F + S N S N N S 40° approx. Diagram of windings, poles, brushes, terminals, etc, viewed from commutator end, and showing armature poles, due to main current. A {Mr Adams} /A. 26-X-20. E.7.C 29/10/20 | ||
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).