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).
Coil temperature test results for a 40/50 HP chassis 98NK after road running on different ignition systems.
| Identifier | ExFiles\Box 69\1\ scan0166 | |
| Date | 8th December 1924 | |
| RR 239 {150 BKS.} {DB{Donald Bastow - Suspensions} 461-8-12-24} MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (7) 19 To Order No. WD{Mr Wood/Mr Whitehead}15 (contd) Customer's No. Test 5. 40/50 H.P. chassis 98NK with standard coil. Car running on road. coil temperature after running engine on magneto 30 mins. Primary winding 54°C Secondary winding 53°C coil temperature after running engine on battery ignition for 1 hour. Primary winding 82°C Secondary winding 82°C Test 6. 40/50 HP chassis 98NK with standard coil. Car running on road coil temperature after 1 hrs run on magneto ignition. Signed (contd) This Sheet must be filed on completion of the work. | ||