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).
Improved performance ignition coil and a new experimental outside primary coil design for a 25 HP car.
| Identifier | ExFiles\Box 164\5\ img079 | |
| 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. XG058 Hs{Lord Ernest Hives - Chair}/HEW1/A11.9.31. 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/AD1.3.8.31. 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. | ||