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).
Request to produce a set of annular spark gaps for ignition testing, based on an attached sketch.
| Identifier | ExFiles\Box 54\3\ Scan266 | |
| Date | 29th January 1931 | |
| X4645 RHC.{R. H. Coverley - Production Engineer} from EFC. EFC4/AD29.1.31. X.4645. ANNULAR SPARK GAPS FOR IGNITION TEST PURPOSES. We require a set of annular test gaps for ignition purposes, and attached please find a rough sketch. Will you please arrange for this to be drawn out in detail and instruct one set (for the present) to be made. Any necessary further information in the matter will be given by my assistant Mr.West. EFC. HEW. | ||