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).
Test report on a Watford Sleeveless Magneto, No.99802, which developed a knocking noise but functioned well as a sparking machine.
| Identifier | ExFiles\Box 65\3\ scan0094 | |
| Date | 9th September 1927 | |
| EFC. from Mx.{John H Maddocks - Chief Proving Officer} X7791 Mx{John H Maddocks - Chief Proving Officer}10/T9.9.27 Watford Sleeveless Magneto. EFC2/T6.9.27. The magneto you handed to us for test type EW.6. No.99802 developed a pronounced knocking noise in the course of a run of about 40 miles. As you have heard it for yourself on a chassis, I do not propose to say anything more about it. The magneto is returned herewith. As a sparking machine it functioned quite well during our test. CWB Mx{John H Maddocks - Chief Proving Officer} [Signature] | ||