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).
Comparison table of field winding specifications for different motor types.
| Identifier | ExFiles\Box 61b\3\ scan0055 | |
| Date | 28th April 1917 | |
| MOTOR:- FIELD WINDING. COLUMN HEADERS: Lucas. A.510. C.A.V. R.R.45. R.E.17. R.R.24 Bosch. Bijur. ROW 1: Arrangement of coils. DATA: Four in parallel. Two in series, 2 in parallel. Four in series. Four in series. Four in series. Four in series. four in parallel ROW 2: Resistance of field winding. (cold). DATA: .00279 .00389 .0204 .0204 .0204 .00299 ROW 3: Weight of copper composing winding. (lbs.). DATA: 1.750 2.500 3.800 3.800 3.800 3.200 ROW 4: Turns per coil. DATA: 18 6 13½ 13½ 13½ ? DOCUMENT REFERENCE TEXT: R.R. 235A (500 M) (S.D. 408. 28-4-17.) Bm. 2156/13. | ||