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 report on the testing of faulty production coils, Nos. 16 and 18.
| Identifier | ExFiles\Box 45\4\ Scan040 | |
| Date | 13th October 1922 | |
| ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.F.C. Order No: P.B.59 Customer's No. X4079 Test of Production Coils Nos 16 and 18 These coils were received from the test department 5.10.22 as faulty. When tested they were found to be very weak, the max. regular sparking gap obtainable being 3.5mm. It was decided that N°18 should be carefully stripped for any information that might be obtained, but it was considered advisable to first have the coil impregnated with wax, as it was a good opportunity to see what the wax could do towards restoring a decidedly weakened coil to its original condition. Eventually, both coils were waxed. On again being tested, it was found that both had sufficiently recovered to give a performance equal to the Cont'd.{John DeLooze - Company Secretary} This Sheet must be filed on completion of the work. RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 | ||