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).
Comparison of A.C. K.11 and A.C. 46 spark plugs with photographs and specifications.
| Identifier | ExFiles\Box 162\2\ img011 | |
| Date | 4th August 1950 guessed | |
| A.C. K.11 REACH --- 0.375" LENGTH OF BARREL --- 0.812" LENGTH OF INSULATOR --- 1.937" INSULATOR MATERIAL - SILLIMANITE REMARKS: FOR TRIAL ON B 80. A.C. 46 REACH --- 0.375" LENGTH OF BARREL --- 0.812" LENGTH OF INSULATOR --- 1.937" INSULATOR MATERIAL - SILLIMANITE REMARKS: FOR TRIAL ON B 80 | ||