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 and table detailing the automatic advance characteristics of Distributor, Scintilla, and Eisemann magnetos.
| Identifier | ExFiles\Box 37\1\ scan 286 | |
| Date | 28th August 1924 | |
| AUTOMATIC ADVANCE CHARACTERISTICS OF DISTRIBUTOR, SCINTILLA AND EISEMANN MAGNETOS. TABLE OF AUTOMATIC AND HAND ADVANCE IN ENGINE DEGREES. UNIT | AUTOMATIC ADVANCE | HAND ADVANCE DISTRIBUTOR | 40° | 30° SCINTILLA. AG6A.D.1523 | 22° | 11.7° SCINTILLA. AM6H. (AVERAGE) | 22° | 13.3° SCINTILLA. AG6A.34703 | 25.3° | 12.7° EISEMANN. NO.93267. | 13° | 0° C. Y-AXIS: CAM ADVANCE (DEGREES) DISTRIBUTOR | ENGINE | MAGNETO 14 | 28 | 42 12 | 24 | 36 10 | 20 | 30 8 | 16 | 24 6 | 12 | 18 4 | 8 | 12 2 | 4 | 6 0 | 0 | 0 X-AXES: MAGNETO ARMATURE SPEED. 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4200 ENGINE SPEED. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 DISTRIBUTOR SPEED R.P.M. 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 CURVE LABELS: DISTRIBUTOR SCINTILLA. AG6A. NO.34703. SCINTILLA. AM6H. (AVERAGE). SPECIFICATION. FIGURE. SCINTILLA. AG6A. NO. D1523. EISEMANN. NO.93267. STAMP/HANDWRITING: H.E.W. 27.8.24 E.F.C. 28/8/24 | ||