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).
Engine misfiring in a Phantom III caused by K.L.C. sparking plugs with incorrect gaps.
| Identifier | ExFiles\Box 142\3\ scan0269 | |
| Date | 9th July 1937 | |
| CHATEAUROUX. Rm{William Robotham - Chief Engineer}/IMW{Ivan M. Waller - Head of Chateauroux}/2/JAB.9.7.37. 1204 also 30-oa To. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/WSt. c. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} 32-EX. PHANTOM III. K.L.C. Sparking Plugs. More misfiring on pick-up was experienced yesterday and it was found that the gaps of six of the FE.30.X.C. plugs had again opened up to .030 - .042" a further 1,100 miles since setting at .020". We are sending these to you for inspection together with two that have maintained the correct clearance, for comparison. After this trouble we replaced to original FE.30.X. plugs. Misfiring occurred and it was found that one had a cracked insulator. We are also sending this with the others, in a different box to distinguish it. Gap clearance is marked on the wrapping papers of each plug. ------------------- Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||