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).
Instruction sheet detailing the testing and fault diagnosis of a 40/5 Coil.
| Identifier | ExFiles\Box 46\3\ Scan188 | |
| Date | 11th September 1923 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X. 3445. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E F C. Order No PB116 Customer's No. X 3445. Faulty 40/5 Coil No. 582 This coil has been tested and the fault found to be in the secondary winding. When received the coil was given a trial run on 6.5 mm gap at 8.0 volts and appeared to be OK. It was next tried for continuity of windings when the secondary was found to be broken. On further testing at 8.0 volts, the coil although alright at first seemed to get weaker after a time, the sparking at the gaps becoming irregular. A second test for continuity and secondary milli amps was made, this time the secondary winding being OK and the milli amps of Cont'd.{John DeLooze - Company Secretary} Signed This Sheet must be filed on completion of the work. | ||