Resistance measurements for the field windings of a new sequence starter motor (No. 2 Scheme, Designated J).
| Identifier | ExFiles\Box 64\2\ scan0041 | |
| Date | 17th March 1927 | |
| X7625 17.3.27. RESISTANCES OF FIELD WINDINGS OF NEW SEQUENCE STARTER MOTOR (No.2.SCHEME). (DESIGNATED J). Teazer :- 16°C Volts. (42) Amps. (42) Ohms. .182 .481 .379 .275 .731 .376 .366 .980 .374 Average .375 ohms. Resistance (calculated) at 45°C = .42 ohms. Main. 16°C Millivolts. (22407) Amperes. (42) Ohms. 9.45 2.61 .00362 16.42 4.56 .00360 23.7 6.40 .00370 All in series. 3 1/2 turns per pole. Average = .00365 ohms. Resistance (calculated) at 45°C = .00405 ohms. EFC {E. Fowler Clarke - Electrical Engineer} /HEW. | ||
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).