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 secondary milliamps, primary point gap, and contact breaker timing.
| Identifier | ExFiles\Box 40\2\ Scan125 | |
| Date | 10th August 1926 guessed | |
| -5- (14) Secondary milliamps :- Maximum :- 17.8 Minimum :- 4.8 (15) Primary point gap after previous tests :- .015" Primary point gap .019" Contact breaker timing. | | Make. | Break. | |-------|------------|--------------| | A | 8° | 107° | | R | 63° | 162.5° | | | Retard. | Advance. | |--------|------------|--------------| | Make. | 61° | 7° | | Break | 164° | 109° | | Make. | 245° | 189° | | Break. | 341° | 285° | Make ratio :- .551 Primary point gap :- .011" Contact breaker timing. | | Make. | Break. | |-------|------------|--------------| | A | 0° | 111.5° | | R | 56.5° | 166.5 | | | Retard. | Advance. | |--------|------------|--------------| | Make. | 56° | 0° | | Break | 167° | 114° | | Make. | 237° | 180° | | Break | 346° | 289° | Make ratio :- .615 Average variation in break = ± 2 1/2° Contd. | ||