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 of sparking plugs returned from chassis WXA-1.
| Identifier | ExFiles\Box 109\5\ scan0039 | |
| Date | 22th April 1938 | |
| 664 . Rm{William Robotham - Chief Engineer} LA{L. A. Archer}3/T22.4.38 re. Chassis No. WXA-1 Re the sparking plugs returned ex the above chassis. I tested these plugs on our tester and found that at 85 lbs. pressure these plugs did misfire. Without doing anything to them I fitted them into a Bentley Chassis and we gave them a run of approximately 50 miles but could perceive no signs of misfire during this run. I again put the plugs in the tester and found that they still misfired at 85 lbs. pressure. The plugs have now been handed to Childs and I expect he will let you have a further report. LA{L. A. Archer} [Signature] | ||