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).
Technical data table comparing performance characteristics of Remy 12, Remy 6, and Delco contact breakers.
| Identifier | ExFiles\Box 52\3\ Scan271 | |
| Date | 28th April 1917 guessed | |
| -4- Remy 12. Remy 6. Delco CONTACT BREAKER. No. of breaks per revolution 12 6 6 Platinum gap set at .020" .028" - Ratio Time contact made / total time .670 .65 - (Period (sec) .00556 .01111 - (Time of make (sec) .00372 .0072 - (Time of break (sec) .00184 .0039 - All at 900 R.P.M. of breaker. CONTACT BREAKER & PRIMARY. Ratio time of make / time constant 1.145 1.09 Calculated current at break (amperes) 4.42 3.5 Both at 900 R.P.M. of breaker. CONTACT BREAKER & CORE. Approx. flux at break 7880 10400 CONTACT BREAKER PRIMARY & CORE. Approx. flux interlinkages at break. 1,326,000 12,620,000 CONTACT BREAKER SECONDARY & CORE. Approx. flux interlinkages at break. 180.8 158 / 167 x 10^6 Approx. quantity of electricity discharged per break (microcoulombs). 441 575 C' / Co .682 .665 | ||