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).
Continuation test instruction sheet (page 8) detailing coil winding temperatures after a run on battery ignition.
| Identifier | ExFiles\Box 69\1\ scan0167 | |
| Date | 8th December 1924 | |
| RR 228 (150 BKS.) (DB{Donald Bastow - Suspensions} 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (8) 19 To Order No. WD{Mr Wood/Mr Whitehead}15 (contd) Customer's No. Primary winding 68°C Secondary winding 66°C Coil temperature after 1 1/2 hrs run on battery ignition. Primary winding 120°C Secondary winding 102°C It was found that the 40/50 HP chassis required to be run longer than the 20 HP to allow the coil temperature to settle down to its approx final value. The two most important tests for comparison are Nos. 3 and 6 which demonstrate the fact Signed (contd) This Sheet must be filed on completion of the work. | ||