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).
Ignition misfiring issue caused by the proximity of high and low tension wires.
| Identifier | ExFiles\Box 52\1\ Scan058 | |
| Date | 8th August 1927 | |
| X8560 To BY {R.W. Bailey - Chief Engineer} /RD. from EFC. {E. Fowler Clarke - Electrical Engineer} c. Mx. {John H Maddocks - Chief Proving Officer} EFC {E. Fowler Clarke - Electrical Engineer} 3/T8. 8. 27. IGNITION WIRING. On ignition wiring erection it is possible for one of the L.T. ignition wires which passes through the redmanol right angle bend, together with the H.T. ignition wires passing to and from the distributor head, to run too close to one of the distributor head terminals. There is insufficient spark-over distance from these distributor head terminals if a L.T. conductor of any kind (e.g. the hand) is placed upon or near them. A case of misfiring on a chassis has been shewn me due to a spark jumping from one of the H.T. distributor terminals to a L.T. ignition conductor. I suggest that you might instruct some simple method which will avoid the blue wiring running too close to the distributor head, such as taping and varnishing the three blue wires together where they pass through the right angle bend. I consider it desirable that the possibility of this proximity should be avoided. EFC. {E. Fowler Clarke - Electrical Engineer} | ||