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).
Procedure for checking and adjusting the engine ignition advance mechanism and associated linkage.
| Identifier | ExFiles\Box 65\1\ scan0181 | |
| Date | 29th September 1926 | |
| contd :- -6- Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG29.9.26 ----------- hand quadrant it remains to ascertain that the controls allow the full 27° automatic advance from the oil relay. This can be accomplished by pushing the end of Lever E.72518 towards the crankcase until it comes up against some definite stop. The engine should now be turned over with the hand control in the fully advanced position and the distributor points should break 47° ± 2° B.T.C. If this does not occur, Rod E.72614 should be disconnected and the test repeated: if this enables the required range to be obtained, the obstruction was due to the magneto sleeve coming up against its stop and to obviate this, Rod E.72614 should be lengthened slightly. Should the range still be deficient however, Rod E.72586 to the distributor should be disconnected, if this produces the required improvement the distributor is coming up against its stop. In this case the Rod E.72586 should be shortened and the battery ignition re-timed. If neither the magneto or battery are responsible for restricting the movement, the levers in the linkage should be examined to see that their jaws allow them to work through the required angle and that no toggling is taking place. If the linkage appears to be satisfactory, the cap on the top of the oil relay E.72495 should be unscrewed a turn. If this increases, the advance obtainable, the car should be adjusted until the required 47° can be obtained and then a washer of suitable thickness fitted beneath it. If more than 49° advance on the flywheel can be obtained, the contd :- | ||