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 for tests on coil heating and resistance carried out on various chassis.
| Identifier | ExFiles\Box 69\1\ scan0161 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 305975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To_____________________19__ Order No. WD{Mr Wood/Mr Whitehead}15 (contd) Customer's No.____________ comparisons were obtained of the heating of the coil relative to the car standing or running on the road. The increase in resistance method was used for determining the temperature, the same instruments e.g. No 98. for volt readings and 22596 for ampere readings, being used for each test. In all, six tests were carried out, three on expl chassis 10G3, two on 98NK and one on 17EX. The tests consisted of:- ⓐ Measuring the resistance of the primary and secondary windings at atmospheric temperature. ⓑ Measuring the resistances and thereby Signed (contd) This Sheet must be filed on completion of the work. | ||