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).
Ordering mica plates and investigating their thickness to improve the capacity of condensers for battery ignition.
| Identifier | ExFiles\Box 34\1\ Scan040 | |
| Date | 8th January 1919 | |
| Mr. Coverley. from EFC. X. 2512. EFC4/T8.1.19. CONDENSERS FOR BATTERY IGNITION We have instructed the Order Office to order up 3000 mica plates F.6562 for the purpose of making up condensers. At the time the first lot of condensers were made up from the thinner and better quality mica which we received of which the condenser which was lost was one, I understood that these condensers had been made up by specially selecting the mica plates for thinness from the plates available. I would like this confirmed, because it would account for the last group of condensers not having the same good capacity for their size, and I would like you to tell me, if this information is available, what the average thicknesses of the plates used to make up these two respective groups of condensers were. Would you kindly let me have this information right away as I wish to ask the O.O. to ask the makers if possible, to select these plates for us so that they shallall be under a certain figure. We wish to get the best possible capacity in the least possible space. As I shall not be here for the remainder of the week, I must have this information to-day. EFC. | ||