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).
The testing and failure of two types of AC sparking plugs.
| Identifier | ExFiles\Box 163\5\ img094 | |
| Date | 18th November 1937 | |
| To RM{William Robotham - Chief Engineer}/Childs CGRM c/file A.C. Sparking Plugs 60T1. We have tested two sets of A.C. sparking plugs. AC X428 fitted in 26GW. AC XK14 fitted to 22GW. Two of the AC X428 plugs have broken down with the central electrodes cracking up. Mileage 1500. The AC XK14. Complaint of misfire in 22GW. fitting of FLB.30X set at the same gap cured the trouble. Mileage 400. We have returned these plugs to RM{William Robotham - Chief Engineer}/Childs for their examination and report. RM{William Robotham - Chief Engineer}/W Beazer | ||