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 report detailing secondary milliamps, primary point gap, and contact breaker timing measurements.
| Identifier | ExFiles\Box 40\2\ Scan110 | |
| Date | 24th April 1926 guessed | |
| -5- (14) Secondary milliamps :- Maximum :- 17.0 Minimum :- 4.5 (15) Primary point gap after previous tests:- .014" Primary point gap .010" Contact breaker timing. Table 1: Left Side: Make, Break A.{Mr Adams} -5°, 108° R.{Sir Henry Royce} 54.5°, 167° Right Side: Retard, Advance Make. 55°, -5° Break. 166°, 108° Make. 234°, 175° Break. 348°, 288° Make ratio:- .628 Primary point gap :- .018" Contact breaker timing. Table 2: Left Side: Make, Break A -1°, 102.5° R 58.5°, 163° Right Side: Retard, Advance Make. 58°, -1° Break 162°, 102° Make. 239°, 179° Break. 344°, 283° Make ratio :- .578 Handwritten: Extreme variation of break ±3° " " " make ±3° contd. | ||