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).
The performance and electrical properties of paraffin wax filled coils.
| Identifier | ExFiles\Box 69\1\ scan0152 | |
| Date | 1st October 1928 guessed | |
| -2- WD.{Mr Wood/Mr Whitehead}14. and the wax remained white as when new, but in the case of (b) the wax became discoloured brown and a conductance of .003 micromhos was obtained. We therefore conclude that paraffin wax filled coils remain slightly cooler than standard and do not appear to be any the worse electrically providing the wax is pure and not taken to a temperature higher than 150°C. We do not consider there is much advantage over standard with coils filled with paraffin wax. EFC/HEW. | ||