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).
Table of particulars for the resistances and inductances of primary and secondary Goshawk ignition coils.
| Identifier | ExFiles\Box 45\4\ Scan231 | |
| Date | 1st March 1924 | |
| X.4596. X.4079 1.3.24. PARTICULARS OF RESISTANCES AND INDUCTANCES OF PRIMARY & SECONDARY OF GOSHAWK IGNITION COILS. Coil. | PRIMARY | SECONDARY | Remarks. --- | --- | --- | --- | Resis. (W) | Imped. at 50~ (W) | Reac. at 50~ (W) | Induc. (hys) | Resis. (W) | Imped. at 50~ (W) | Reac. at 50~ (W) | Induc. (hys) | TR.{Capt. F. W. Turner - Finance}1 | .853 | 3.13 | 3.08 | .00966 | 4383 | 12280 | 11515 | 36.17 | In lab. TR{Capt. F. W. Turner - Finance} 2. | .878 | 3.24 | 3.12 | .00978 | 4697 | 12365 | 11425 | 35.82 | 6 GII TS 4. | .846 | 3.02 | 2.90 | .00912 | 4251 | 13630 | 12950 | 40.6 | In lab. TS 6. | .862 | 3.32 | 3.21 | .01005 | 4268 | 13500 | 12800 | 40.2 | In lab. 4205. T Std. | .919 | 3.26 | 3.12 | .00980 | 4465 | 11090 | 10140 | 31.85 | Borrowed from prodn. 4206. T Std. | .884 | 3.00 | 2.87 | .00900 | 4492 | 10730 | 9885 | 31.10 | Borrowed from prodn. 4207 T Std. | .919 | 3.25 | 3.12 | .00980 | 4804 | 13416 | 12520 | 39.3 | Borrowed from prodn. Representative figures fixed upon. | .90 | 3.18 | 3.05 | .0096 | 4470 | 12000 | 11130 | 35.0 | Basis of numerical result Vertical text on right: X 4079 | ||