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 40\2\ Scan195 | |
| Date | 1st June 1927 guessed | |
| -2- (Handwritten in red: L) (4) Primary point gap :- .010" Contact breaker timing :- | | Make | Break | |---|---|---| | A | -7.5° | 96° | | R | 52.5° | 156° | | | Retard | Advance. | |---|---|---| | Make. | 53° | -7° | | Break | 155° | 95° | | Make | 232° | 172° | | Break | 336.5° | 276.5° | Range :- 60° Make ratio :- .575. (5) Automatic advance characteristics :- Hand range :- Auto range :- Total :- | Speed | Degrees advanced. | |---|---| | | | | | | Contd. | ||