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).
Specification sheet detailing measurements for H.T. safety gap, distributor, platinum point gap, and contact breaker timing.
| Identifier | ExFiles\Box 48\2\ Scan155 | |
| Date | 21th August 1924 guessed | |
| -2- . Contd. (4) Length of H.T. safety gap (inches) :- .442 " " " " " (mm.) :- 11.2 (5) Distributor :- Total pitch :- 1.06" Conductor width :- .195" Brush width :- .562" (advanced auto) .09" Position of brush at break (advanced) :- .31" " " " " " (retarded) :- .42" (6) Platinum point gap :- .011" Contact breaker timing :- [Table 1] Make. Break. A. {Mr Adams} 16.5° 97.5° R. {Sir Henry Royce} 73° 155° [Table 2] (auto + hand) Retarded. Advanced. Make. 76.5° 19° Break. 155° 97° Make. 250.5° 193.5° Break. 335.5° 278° Range :- 57° Make ratio :- .453. Contd. | ||