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).
The parts required for a modified switchbox for a 20/25 HP, chassis 18-GIV, to enable Half Charge Switching.
| Identifier | ExFiles\Box 163\6\ img027 | |
| Date | 4th April 1930 | |
| X6016 COPY. RHC.{R. H. Coverley - Production Engineer} By/RD3/W14.4.30. Re - 20/25 HP. Switchbox : Sec. 8160. - Chassis 18-GIV. In order to provide the above chassis with Half Charge Switching, we are sending you herewith new details of the Switchbox required. We are going to use a 40/50 HP. Switchbox as instructed for 23-EX etc. but suitably modified to take the ignition as required for 20 HP. The parts required are as follows :- D.72618 Terminal, dynamo field. D.72617 Packing for switch body. D.72620 Contact plate L.H. D.72619 Contact plate, dynamo field. D.51899 Brush separator D.51900 Insulation plate, magneto. D.51901 Cam, R.H. D.51903/4 Flexible tube for switchbox cable. D.51905 L.O.P. (3 sheets) Switchbox. D.51906 Angle plate, mag. cable eye. D.51908 Switch body. Blue prints of the above are attached herewith. Will you please put one switchbox in hand. By/RD. | ||