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).
Clarifying the type of ignition coil used on a 25 HP car at Brooklands and updating on the design of an experimental coil.
| Identifier | ExFiles\Box 54\5\ Scan356 | |
| Date | 11th September 1931 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Wst. c. Sg.{Arthur F. Sidgreaves - MD} c. Wor.{Arthur Wormald - General Works Manager} Ry. X6045 Hs{Lord Ernest Hives - Chair}/HEW1/A11.9.31. X6045 Y6058 With reference to the last paragraph of R1/M28.8.31 referring to the ignition coil on the 25 HP. car at Brooklands, this coil was not one with the primary on the outside as imagined but the 21,000 turn improved performance coil which was reported on in our Hs{Lord Ernest Hives - Chair}/HEW2/A11 3.8.31. With regard to the outside primary coil, the design of the experimental one which we have been trying for some time is being altered by the D.O. and immediately we have a satisfactory sample we will send one down to W.W. for inspection. Hs{Lord Ernest Hives - Chair}/Wst. | ||