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).
Sketches and notes analysing the characteristics of electrical sparks and arcs under different conditions.
| Identifier | ExFiles\Box 63\4\ scan0006 | |
| Date | 26th May 1918 guessed | |
| (6) (13) ZR6/600/2/W/A Sparks striations Dots of light. (14) ZR6/600/2/W/B Bluish white sparks. Mauvish arc. Arc composed to some extent of striations. (15) ZR6/600/2/E/A More arc at retard than advance. Arc more bushy and more flamey. with less striation effect. (16) ZR6/600/2/E/B More arc than for advance and softer arc and spark i.e. less "snappy". (17) ZR6/600/5/A/A Sparks striations Dots of light. (18) ZR6/600/5/A/B As sketches. | ||