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).
Cross-sectional drawing of a Champion R11.V sparking plug showing its components.
| Identifier | ExFiles\Box 35\4\ scan 009 | |
| Date | 12th March 1928 | |
| DRG. Nº EE. 1651 Issued by:- Directorate of Technical Development. AIR MINISTRY DEPT. ELECTRICAL DRAWN F.{Mr Friese} R.{Sir Henry Royce} J.{Mr Johnson W.M.} TRACED M.R 28-2-28 CHECKED S.D.A. 8/3/28 APPROVED C.G.Brunks 12.3.28 CHAMPION R11.V SPARKING PLUG EARTH POINT (NICKEL) NICKEL ELECTRODE COPPER WASHERS BODY (STEEL) GLAND NUT (STEEL) PORCELAIN INSULATOR BRASS CAP E.E. 1651 | ||