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).
Calculations for slot area, depth, and width using copper space efficiency.
| Identifier | ExFiles\Box 64\1\ scan0120 | |
| Date | 30th April 1923 guessed | |
| -4- Contd. Take copper space efficiency of 50% (say) Then slot area = 4 x .00692 = .02768 sq.inches. Total area of all slots = 1.02 sq. inches (A) Maximum slot depth h = √(A / 2π) = √(1.02 / 6.28) = √.162 = .402" Minimum slot width w = .0277 / .402 = .069" Teeht taken .300" deep by .092" wide. Contd. | ||