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).
Modifications to the Wraith ignition coil for flexible connections and polarity reversal.
| Identifier | ExFiles\Box 164\5\ img312 | |
| Date | 1st July 1937 | |
| To. HPS.{Horace Percy Smith - Experimental Factory Mgr} [Struck through] c. Rm{William Robotham - Chief Engineer}/Wst. 6017. BY/RD.2/B.1.7.37. WRAITH IGNITION COIL - R.R. Sch.1103. In order to provide flexible connections for the primary winding, and we shall also take the opportunity when producing the new winding drawing to obtain the reversal of polarity which is desirable, we have modified the inserts in the top cover to avoid the drilling of the long small diameter hole. These modifications are shown on RR.Sch.1103, blueprints of which are attached herewith. BY/RD. [Handwritten signature] [Handwritten note] I have seen this, discontinued. | ||