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 showing the automatic advance of cam with speed for Scintilla Magnetos, types AG6A and AM6A.
| Identifier | ExFiles\Box 48\2\ Scan097 | |
| Date | 18th June 1935 | |
| AUTOMATIC ADVANCE OF CAM WITH SPEED ON SCINTILLA MAGNETOS TYPE'S AG6A AND AM6A. Left Axis: CAM ADVANCE (DEGREES) Columns: Distributor, Engine, Magneto Armature Values: 14, 28, 42 12, 24, 36 10, 20, 30 8, 16, 24 6, 12, 18 4, 8, 12 2, 4, 6 Bottom Axis: DISTRIBUTOR SPEED (RPM) Scale Rows: MAGNETO ARMATURE SPEED: 300, 600, 900, 1200, 1500, 1800, 2100, 2400, 2700, 3000, 3300, 3600, 3900, 4200, 4500 ENGINE SPEED: 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000 DISTRIBUTOR SPEED: 0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500 Data Tables: AG6A No 21525 AUTOMATIC RANGE = 32.5°, 22° ON ENGINE HAND RANGE = 17.5°, 11.5° " " TOTAL = 50°, 33.5° " " AM6-A No 26495 AUTOMATIC RANGE = 33°, 22° ON ENGINE HAND RANGE = 20°, 13.5° " " TOTAL = 53°, 35.5° " " AM6A No 34397 AUTOMATIC RANGE = 33.5°, 21.5° ON ENGINE HAND RANGE = 20.5°, 14° " " TOTAL = 53°, 38.5° " " Graph Curves: R.R. GOSHAWK DISTRIBUTOR CURVE REQUIRED BY ENGINE. (FIGURES SUPPLIED BY E.P.) AM6A NO 26485 AM.6A No 34397 AG6A No 21525 Bottom Right Corner: E.P. 18.6.35 | ||