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).
Ignition characteristics and advance settings for the Bentley III, No.2 unit.
| Identifier | ExFiles\Box 168\2\ img019 | |
| Date | 4th February 1938 | |
| To Rm{William Robotham - Chief Engineer}/RC.{R. Childs} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 6119. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}4.2.38. BENTLEY III. IGNITION CHARACTERISTICS. For B.III No.2 unit the following ignition governor characteristic is required and should be fitted as soon as possible. R.P.M. Advance. Engine Flywheel 250 125 Start 500 250 5° +2° 2 1/2 - 3 1/2 750 375 9° " 4 1/2 - 5 1/2 1000 500 13° " 6 1/2 - 7 1/2 1500 750 18° " 9 - 10 2000 1000 21° " 10 1/2 - 11 1/2 2500 1250 23° " 11 1/2 - 12 1/2 3000 1500 25° " 12 1/2 - 13 1/2 3500 1750 27° " 13 1/2 - 14 1/2 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Swdl{Len H. Swindell} Rmcway | ||