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).
Specifying the correct tin lead fuse wire size for an experimental Lucas switchbox.
| Identifier | ExFiles\Box 61\2\ scan0329 | |
| Date | 16th March 1920 | |
| X. 2515 Mr. Clark. 16.3.20. X.2515 - FUSE IN EXPL. LUCAS SWITCHBOX X.3957 The correct size of tin lead fuse wire for the main fuse in the above box is .041" (19 S.W.G.) With this size of fuse the full charging current of the Lucas E.575 dynamo is easily carried when the machine is in a cold condition. If the cutout sticks on the fuse will easily blow with the machine in a fully hot condition. L.F. | ||