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).
Specifications for primary point gap, contact breaker timing, and automatic advance characteristics.
| Identifier | ExFiles\Box 43\4\ Scan129 | |
| Date | 19th July 1928 guessed | |
| -2- (4) Primary point gap:- .012" Contact breaker timing:- Make. Break. A 2° 52° R 34° 81° ADVANCE RETARD Make. 1° 33.5° Break. 52° 81° Make. 93° 125° Break. 142° 171° Range:- 30° Make ratio :- .539 (5) Automatic advance characteristics :- Speed. Degrees advanced. Hand range:- Auto range:- Total :- Contd. | ||