Modification to the windings of ignition coils for the Wraith model.
| Identifier | ExFiles\Box 164\5\ img321 | |
| Date | 8th December 1937 | |
| To By. {R.W. Bailey - Chief Engineer} c. By {R.W. Bailey - Chief Engineer} /RD. 6017. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 2/JH.8.12.37. re Wraith Coils to LOP.D.75673. Our latest tests on ignition coils indicate that it is desireable to arrange the windings so that the ends of the primary and secondary coincide. We notice that on the latest drawing this is not the case. As it is very important that the output of the secondary is up to the maximum on this car, we consider that this modification should be introduced as soon as possible. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} | ||
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).