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 and test results for ignition coil temperature readings.
| Identifier | ExFiles\Box 69\1\ scan0165 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (6) To__________________________________19__ Order No. W015 (contd) Customer's No._____________ Coil temperature after 1 1/2 hrs run on the engine on battery ignition. Primary winding. 93°C. Secondary winding 93°C. Test 4. 40/50 HP. chassis 17EX with finer primary coil. Car standing. Coil heated up by engine running on magneto for 30 mins. Primary winding 65°C Secondary winding 54°C. Coil temperature after running 1 hr on battery ignition! Primary winding 138°C Secondary winding 122°C Signed (Contd) This Sheet must be filed on completion of the work. | ||