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).
Designs for Spectre sparking plugs, terminals, and cylinder head modifications.
| Identifier | ExFiles\Box 168\4\ img011 | |
| Date | 27th August 1935 | |
| 6127 To-DY.{F R Danby} from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}2/HP.27.8.35. c. hs{Lord Ernest Hives - Chair}/Rem. RHC.{R. H. Coverley - Production Engineer} hs{Lord Ernest Hives - Chair}/Wst. SECRET re SpectreCodename for Phantom III Sparking Plugs and Terminals. We send you herewith:- LeC.4658 and LeC.4659 showing two designs of terminal cover. The main object of the design is to provide a terminal which will fix on any sparking plug. Will you please instruct these up experimentally and submit the models to us for inspection. Also herewith:- LeC.4607 showing modifications to the cylinder head in the region of the sparking plug holes, to accommodate the Lodge plug KL.14-1 which is now recommended by Experimental Department in preference to KL.14. Plug KL.14-1 is shorter in length than we have ever had to cater for. E/JNR.{Charles L. Jenner} | ||