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).
Standardisation of an ignition coil with reversed primary connections for the Phantom III.
| Identifier | ExFiles\Box 171\2\ img300 | |
| Date | 2nd August 1937 | |
| RR 755 (10H) 38137 7-4-37 WHK 26070 COMPLETED 21.8.37 PHANTOM III STANDARDISATION of PARTS. Date: 2.8.37 X No. 6013 Drawing No. Part List Description of Parts: IGNITION COIL WITH REVERSED PRIMARY CONNECTIONS% Origin: To reduce plug voltage. Report of Experimental Test: Tests on Expl. Phantom III. cars shew that misfiring which occurs when the plug gaps erode beyond a certain amount can be improved by reversing the coil polarity. There is no electrical difference in the coil from an insulation point of view warranting endurance tests. MATERIAL £ s. d.{John DeLooze - Company Secretary} LABOUR £ s. d.{John DeLooze - Company Secretary} CHARGES £ s. d.{John DeLooze - Company Secretary} TOTAL £ s. d.{John DeLooze - Company Secretary} Cost of Old Part Cost of New Part Nett Increase/Decrease No difference. Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 28.7.37. INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 20.8.37 | Agreed SG.{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} | | Agreed Hs.{Lord Ernest Hives - Chair} C. | 6.8.37 | Agreed C. E.{Mr Elliott - Chief Engineer} | | DA.{Bernard Day - Chassis Design} | 12.8.37 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 3.8.37 | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | | RHC.{R. H. Coverley - Production Engineer} | 3.8.37 | Agreed RHC.{R. H. Coverley - Production Engineer} MX.{John H Maddocks - Chief Proving Officer} | 2.8.37 | Agreed Mx.{John H Maddocks - Chief Proving Officer} RM.{William Robotham - Chief Engineer} | 2.8.37 | Agreed Rm.{William Robotham - Chief Engineer} | ||