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).
Performance and standardization of various sparking plugs.
| Identifier | ExFiles\Box 58\3\ Scan082 | |
| Date | 17th July 1924 | |
| X19180. BY EP{G. Eric Platford - Chief Quality Engineer}1/H17.7.24. c. Hs.{Lord Ernest Hives - Chair} re. SPARKING PLUGS. Confirming telephone conversation, we are afraid we have not yet had sufficient experience with the K.1.R.plug to recommend it definitely over the present standard K.1.Plug. Our experience, however, so far does confirm that the K.1.R. type has no disadvantages as compared with the K.1.type. In addition to this, we have been able to overcome complaints from one or two customers in regard to plugs by fitting K.1.R. type plugs. We suggest, therefore, that a further 250/500 K.1.R. type be obtained, and we recommend that if the Experimental Department can confirm these good results that such a plug is standardised. We take it that the K.1.R. plug is a standard K.1. type modified in accordance with K.L.G's letter of March 27th. paragraph 2. We understood that the latest recommended K.L.G. plug was one in which"the interior insulation was stepped" which they claimed had an advantage over the then standard plug, in that it rendered the plug capable of withstanding more severe oiling and soot depositing conditions (see Wd{Mr Wood/Mr Whitehead}5/NJ29.1.24). The K.1.R. plug does not appear to have this improvement. Possibly such plugs as these are now being tested out by Hs.{Lord Ernest Hives - Chair} and we should be glad to have his report, as we are naturally anxious to obtain the latest type K.L.G.plug which the makers recommend. EP.{G. Eric Platford - Chief Quality Engineer} | ||