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 65\3\ scan0076 | |
| Date | 3rd September 1927 guessed | |
| -2- (4) Primary point gap :- .010" Contact breaker timing :- Retard. Advance. Make. 57° -3° Break. 157° 96° Make. 238° 177° Break. 338° 278° Make. Break. A -3° 97° R 57.5° 157.5° Range :- 60.5° Make ratio:- .556 (5) Automatic advance characteristics :- Speed. Degrees advanced. Hand range: Auto range :- Total :- Contd. | ||