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).
Engine ignition timing specifications for point gap, contact breaker timing, and automatic advance characteristics.
| Identifier | ExFiles\Box 40\2\ Scan107 | |
| Date | 24th April 1926 guessed | |
| -2- (4) Primary point gap :- .013" Contact Breaker timing:- Table 1: Make. Break. A.{Mr Adams} -3° 104.5° R.{Sir Henry Royce} 56.5° 163.5° Table 2: Retard. Advance. Make 57° -3° Break 164° 105° Make 236° 177° Break 343° 284° Range:- 59° Make ratio:- .597 (5) Automatic advance characteristics :- Hand range:- Auto range :- Total :- Speed. Degrees advanced. Contd. | ||