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).
Graph comparing engine Brake Horsepower (BHP) against RPM for different carburetter configurations.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan149 | |
| Date | 22th October 1930 guessed | |
| AIR SILENCED CARBURETTER STANDARD EXHAUST SYSTEM. BHP 110 100 90 80 70 60 50 40 30 STANDARD CARBURETTER:- COMPLETELY SILENCED CARB. AIR VALVE RELIEF HOLES IN COMPLETELY SILENCED CARB ENGINE R P M 1000 1500 2000 2500 3000 | ||