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 of current consumption curves for a standard tall coil at 8 and 12 volts, plotting current against distributor speed.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan147 | |
| Date | 29th April 1934 | |
| CURRENT CONSUMPTION CURVES FOR R.R. STANDARD TALL COIL IN STABALITE CHAC AT 8 AND 12 VOLTS RESPECTIVELY. Y-AXIS (LEFT): CURRENT AT BREAK (AMPERES) Y-AXIS (RIGHT): AVERAGE CURRENT (AMPERES) X-AXIS (TOP): DISTRIBUTOR SPEED R.P.M X-AXIS (BOTTOM): CHASSIS M.P.H. (GOSHAWK) (11/50 AXLE TYRE DIA. 31.4") CURVE LABELS: 8 VOLTS CALCULATED CURRENT AT BREAK (8 VOLTS) CALCULATED 12 VOLTS OBSERVED 8 VOLTS OBSERVED LEGEND: SPARKING AT 6.5 M.M. GAP. O.M. OCCASIONAL MISSING B.M. BAD MISSING O.S. OCCASIONAL SPARKS S.E. SPARKS EXTINGUISHED. INITIALS: H.E.W. | ||