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).
Hand-drawn winding diagram for a 4-pole, 4-circuit wave-wound armature.
| Identifier | ExFiles\Box 68\4\ scan0190 | |
| Date | 1st January 1945 guessed | |
| Up Down 1 8 15 22 5 12 19 2 9 16 23 6 13 20 3 10 17 24 7 14 21 4 11 18 4 pole 4 circuit wave wound armature n = 24 p = 4 y = (n+4)/4 = 7 k = 3. | ||