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 failures caused by inconsistencies in Lodge and K.L.G. aluminium oxide insulated spark plugs.
| Identifier | ExFiles\Box 27\3\ Scan254 | |
| Date | 10th October 1939 | |
| R.R. 306. ST.{Capt. P. R. Strong} 74997/4/11/38. C.E. EXPERIMENTAL DEPARTMENT REPORT. REFERENCE:- Lr{Mr Ellor}/Wst.23/WJ.10.10.39. Subject of Report:- Investigation into inconsistencies experienced with the heat factors of Lodge and K.L.G. aluminium oxide insulated plugs resulting in engine failures. General Conclusion:- The design of both K.L.G. and Lodge types is fundamentally unsound resulting in the heat factor varying in use. The use of a silver core central electrode melted into position in the insulator is recommended based on results obtained with plugs designed by the A.C. Co. Placing the gas seal on the electrode as near as possible to the firing end is recommended. Lr{Mr Ellor}/Wst/J.Marsden. COMPLETE DETAILS OF THE EXPERIMENT OR TEST UNDERTAKEN CAN BE OBTAINED FROM THE LIBRARY ON REQUEST. Copies of Report Circulated to:- Hs.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} Lr.{Mr Ellor} En. Dor.{Mr Dorey} Lb. Sft.{Mr Swift} TB/Pkn. Report to be noted for further action by:- Lr{Mr Ellor}/Lov.{Mr Lovesey} Mr.Bradshaw A.I.D. Test carried out on:- Wst. in conjunction with Messrs. K.L.G. and Lodge. By:-- Test No. Date:-- | ||