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 to improve misfiring.
| Identifier | ExFiles\Box 164\5\ img289 | |
| Date | 2nd June 1937 | |
| RR 755 (roH) 38137 7.4.37 WHK 26070 COMPLETED 21.8.37. PHANTOM III STANDARDISATION of PARTS. Date 2.6.37. 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 Exptl. 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/Rl. 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} | 16.8.37. | Agreed 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} Stamp: J.S. 14 AUG 1937 | ||