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).
Test results for ignition coils at various temperatures, detailing maximum regular sparking gap.
| Identifier | ExFiles\Box 45\4\ Scan254 | |
| Date | 14th July 1924 guessed | |
| -2- Contd. (1) Temperature of oven = 77°C Coil No. Volts. Max. regular sparking gap. TS.6 8 4.0 mm. (Gaps Nos.4,5 and 6 out) TR.{Capt. F. W. Turner - Finance}1 8 6.0 mm. TR.{Capt. F. W. Turner - Finance}1 12 6.5 mm. TS.6 12 6.5 mm. TR.{Capt. F. W. Turner - Finance}5 8 4.5 mm. (Gap No.6 out) 4383. 8 4.5 mm. (Gaps Nos.5 & 6 out) TR.{Capt. F. W. Turner - Finance}5. 12 6.5 mm. 4383. 12 6.5 mm. (2) Temperature 82°C. TR.{Capt. F. W. Turner - Finance}1. 8 5.5 mm. TS.6 8 4.0 mm. (Gaps 3,4,5 & 6 out) TR.{Capt. F. W. Turner - Finance}1 12 6.5 mm. TS.6 12 6.5 mm. TR.{Capt. F. W. Turner - Finance}5 8 4.0 mm. (Gaps 5 & 6 out) 4383. 8 4.5 mm. TR.{Capt. F. W. Turner - Finance}5. 12 6.5 mm. 4383. 12 6.5 mm. (3) Temperature 87°C. TR.{Capt. F. W. Turner - Finance}1. 8 5.5 mm. TS.6 8 4.0 mm. (Gaps 3,4,5 & 6 out) TR.{Capt. F. W. Turner - Finance}1 12 6.5 mm. TS.6 12 6.5 mm. TR.{Capt. F. W. Turner - Finance}5. 8 4.5 mm. (Gaps 5 & 6 out) 4383. 8 4.0 mm. TR.{Capt. F. W. Turner - Finance}5 12 6.5 mm. 4383. 12 6.5 mm. (4) Temperature 100°C. TR.{Capt. F. W. Turner - Finance}1 8 5.0 mm. (Gap No.6 out) TS.6. 8 4.0 mm. (Gaps 3,4,5 & 6 out). TR.{Capt. F. W. Turner - Finance}1 12 6.5 mm. TS.6 12 6.5 mm. 4383. 8 4.0 mm. (Gaps 4,5, & 6 out) TR.{Capt. F. W. Turner - Finance}5 8 4.0 mm. 4383. 12 6.5 mm. TR.{Capt. F. W. Turner - Finance}5 12 6.5 mm. Contd. | ||