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).
Instructions detailing the results of bench tests on paraffin wax filled coils.
| Identifier | ExFiles\Box 24\2\ Scan297 | |
| Date | 29th September 1928 | |
| RR 228 (150 BKS.) (DS 481-9-12-24) MP 206975 X1109 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Date: 29 - 9 - 1928 Order No.: WD{Mr Wood/Mr Whitehead}1A. Customer's No.: X 8710 Paraffin wax filled coils. We have now conducted bench tests on two coils, one wound and insulated with standard oiled paper and the other insulated with paraffin waxed paper, designated respectively WF1 and PWF1 both being finer primary coils. Each coil was immersed in paraffin wax in its case by Mr Brock's dept. Bench tests on these two coils shewed that they remained slightly cooler than similar coils without the paraffin wax, but the H.T. sparking performance was poor even under normal conditions, and at 100°C misfiring was bad at 12V on Signed: (contd) This Sheet must be filed on completion of the work. | ||