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).
Calculations for an E.A.C. starter motor teazer winding.
| Identifier | ExFiles\Box 64\1\ scan0142 | |
| Date | 19th June 1923 guessed | |
| X.7620. X.9620. E.A.C. STARTER MOTOR TEAZER WINDING. Winding proposed 38 turns of 18 S.W.G. wire Length of mean turn = 2π x 1.1 + 2 x 1.8 + = 6.92 + 3.60 = 10.52" Resistance at 20°C of whole winding = (4 x 38 x 10.52 / 12000) x 4.49 = .60 w. | ||