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).
Secret memo regarding the design of a sparking plug spanner and a new sparking plug terminal.
| Identifier | ExFiles\Box 91\1\ scan0061 | |
| Date | 6th September 1935 | |
| To DY.{F R Danby} from E/JNR.{Charles L. Jenner} c. RHD. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hw/Wst. Rm{William Robotham - Chief Engineer} x300 SECRET. E/JNR.{Charles L. Jenner}2/HP.6.9.35. SpectreCodename for Phantom III Sparking Plugs. We send you herewith:- LeC.4676 showing the sparking plug spanner. The inside of the box spanner is provided with spring fingers which will grip the porcelain of the plug in order to making the plugs accessible from inside the Vee of the engine. Also herewith LeC.4671 showing our No.3. design of sparking plug terminal. We think this is superior to the two previous designs. We shall be able to judge when the models are made. LeC's 4676 and 4671 herewith. E/JNR.{Charles L. Jenner} | ||