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).
The testing procedure for the Wraith Delco ignition coil.
| Identifier | ExFiles\Box 164\5\ img364 | |
| Date | 23th June 1938 | |
| To RHC.{R. H. Coverley - Production Engineer} c. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} 6017. BY/RD.6/B.23.6.38. WRAITH - DELCO IGNITION COIL - SEC.8140. We do not propose that the ignition coil should receive any bench test, but should be fitted to the engine as received. They will be tested before delivery, and the subsequent test they receive on the engine should suffice. BY/RD. | ||