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 detailing the automatic advance cam performance with speed for Scintilla Magnetos types AG6A and AM6A.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan54 | |
| Date | 6th April 1924 guessed | |
| AUTOMATIC ADVANCE CAM WITH SPEED ON SCINTILLA MAGNETOS TYPE'S AG6A AND AM6A. AUTOMATIC RANGE = 32.5° 22° ON ENGINE HAND RANGE = 17.5° 11.5° " " TOTAL = 50° 33.5° " " AG6-A No 21525 AUTOMATIC RANGE = 33° 22° ON ENGINE HAND RANGE = 20° 13.5° " " TOTAL = 53° 35.5° " " AM6-A No 26485 AUTOMATIC RANGE = 32.5° 21.5° ON ENGINE HAND RANGE = 20.5° 14° " " TOTAL = 53° 35.5° " " AM6A No 34397 R.R. GOSHAWK DISTRIBUTOR CURVE REQURED BY ENGINE (FIGURES SUPPLIED BY E.P.) AM6A No 26485 AM6A No 34397 AG6A. No 21525. [Y-Axis] MAGNETO ADVANCE 0 6 12 18 24 30 36 42 [Other scales] 0 3 6 9 12 15 18 21 0 2 4 6 8 10 12 14 [X-Axis] MAGNETO ARMATURE SPEED: 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4200 4500 ENGINE SPEED: 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 DISTRIBUTOR SPEED (RPM): 0 100 200 300 400 500 600 750 900 1000 1100 1200 1300 1400 1500 | ||