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 detailing an investigation into ignition spark characteristics with a condenser and an earthed tube.
| Identifier | ExFiles\Box 52\1\ Scan048 | |
| Date | 29th September 1920 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. 4. Customer's No. 5 '010" 6 '010" With both ignitions working together there was a quite marked difference in the intensity of the sparks, these having the characteristics as when a condenser is placed in paralell with them. However with the tube earthed the regularity of the sparking observed was not impaired. <s>It is suggested that these results confirm the previous arrived at conclusion the earthed metal tube is the best proposition</s> Signed H.E.W. This Sheet must be filed on completion of the work. | ||