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).
Letter from the Air Ministry regarding two new types of screened sparking plugs, Lodge X.496 and Lodge X.506, being sent for suitability assessment.
| Identifier | ExFiles\Box 58\2\ Scan245 | |
| Date | 1st November 1935 | |
| TEL. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADASTRAL HOUSE. KINGSWAY, LONDON, W.C.2. and the following number quoted :- 186753/32/R.D.E.3/E.M.E. [Handwritten]: x6000 [Crest: NATIONAL SCHEME FOR DISABLED MEN] AIR MINISTRY, LONDON, W.C. 2. 1st November, 1935. SPARKING PLUGS - INTEGRAL SCREENING. Gentlemen, I am directed to refer to Air Ministry letter of the 16th ultimo under the above reference and to the three types of screened sparking plug forwarded to you. Two further types are now being forwarded to you herewith, namely, Lodge X.496 and Lodge X.506, both of which are considered suitable in the matter of heat and oil factors for certain of your engines. The former have (has) the standard A.2/2 plug with an integral screen and the letter (latter) the A.14/1 similarly screened. Would you please advise us as early as possible as to the suitability of these plugs to your engine, and, if necessary, in what direction they should be modified. I am, Gentlemen, Your obedient Servant, [Signature: E.L. Mayall Eustace] for Assistant Director/R.D.E. for Director of Technical Development. Rolls-Royce, Limited, DERBY. | ||