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).
Corona discharge issue found during an open-circuit test on a Wraith Type Coil, recommending a smaller insert for better clearance.
| Identifier | ExFiles\Box 164\5\ img320 | |
| Date | 15th November 1937 | |
| BY.{R.W. Bailey - Chief Engineer} BY/RD. 6017 Rm{William Robotham - Chief Engineer}/RC.{R. Childs}9/JH.15.11.37. re Wraith Type Coil. During an open-circuit test on one of the latest type coils, a corona discharge was noticed between the primary terminal insert and the base of the H.T. lead-in. Other coils with similar type case, but with smaller inserts were tried, and it was found that this effect was not nearly so noticeable. From this we recommend that a smaller insert should be used, giving as much clearance as possible between itself and the base of the H.T. lead-in. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||