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 primary point gap, contact breaker timing, and automatic advance characteristics.
| Identifier | ExFiles\Box 48\2\ Scan196 | |
| Date | 14th May 1926 guessed | |
| -2- (4) Primary point gap:- .012" Contact Breaker timing :- Table 1: | Make. | Break. | |---|---| | A. {Mr Adams} 10.5° | 93.5° | | R. {Sir Henry Royce} 74° | 155.5° | Table 2: | | Retard. | Advance. | |---|---|---| | Make | 74° | 11° | | Break | 156° | 94° | | Make | 254° | 190° | | Break | 335° | 273° | Range:- 63° Make ratio :- .455 (5) Automatic advance characteristics :- Hand range:- Auto range :- Total :- Graph Headers: Speed. | Degrees advanced. Contd. | ||