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 in a Stabalite case at 8 and 12 volts.
| Identifier | ExFiles\Box 54\5\ Scan262 | |
| Date | 1st July 1932 | |
| CURRENT CONSUMPTION CURVES FOR R.R. STANDARD TALL COIL IN STABALITE CASE. AT 8 AND 12 VOLTS RESPECTIVELY. Y-Axis Labels: CURRENT AT BREAK (AMPERES) AVERAGE CURRENT (AMPERES) X-Axis Labels: DISTRIBUTOR SPEED R.P.M CHASSIS M.P.H. (GOSHAWK) (11/50 AXLE TYRE DIA" 31.4") Curve Labels: CURRENT AT BREAK (8 VOLTS) CALCULATED. 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. Annotations on curves: O.M. B.M. O.S. S.E. Stamp: H.E.M / 1/7/32 | ||