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).
Critique of the low tension earthing connection method on Watford IS.12 magnetos.
| Identifier | ExFiles\Box 43\4\ Scan046 | |
| Date | 7th January 1927 | |
| EFC WB.{Mr Brazier/Mr Bell}124. 7.1.27. LOW TENSION EARTHING CONNECTION ON WATFORD IS.12 MAGNETOS. This method adopted by Messrs. Norths for securing the low tension earthing or switching wire is not considered by ourselves and the testers to be at all satisfactory. At present there is very little margin allowed for clamping the wire, and unless the conductor is tightly twisted and of the correct size to just push into the hole, it works loose and can be easily pulled away. We should be glad if Messrs. Norths would modify these clamps in the future, by either allowing the clamping nut to be screwed up further or adopting a screw terminal arrangement, as on the B.T.H. magnetos. EFC/H.E.West. | ||