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).
Magneto No.106012 which has developed a bad knock.
| Identifier | ExFiles\Box 65\3\ scan0201 | |
| Date | 28th February 1928 | |
| EFC from Mx.{John H Maddocks - Chief Proving Officer} Mx{John H Maddocks - Chief Proving Officer}16/T28.2.28 EW.6. Magneto No.106012. Since issuing our report Mx{John H Maddocks - Chief Proving Officer}3/T28.2.28 on the above, the magneto in question has developed a bad knock. This has been demonstrated to your Assistant Mr West, and we are arranging to return the magneto to you. The knock developed after running a further 95 miles i.e. 245 miles in all. Mx{John H Maddocks - Chief Proving Officer} [Signature] | ||