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).
Letter to Joseph Lucas Ltd. providing dimensions for a 20 HP magneto and details of the ignition system.
| Identifier | ExFiles\Box 57\2\ Scan258 | |
| Date | 20th April 1928 | |
| c. Mailing c. Roy.{Sir Henry Royce} X549P EFC2/T. 20th April, 1928. Messrs. Joseph Lucas Ltd., Well Street, Birmingham. Dear Sirs, Further to our EFC3/T. of the 4th inst. and with further reference to yours X/R3. of the 5th inst., the overall dimensions of our present standard 20 H.P. magneto are :- Length. 8.586". Width. 3.582". Height. 4.625". With regard to the ignition system on the 20 H.P. model, there has been no change from the original scheme which you describe, in which the magneto is used only as a stand-by with changeover arrangements and one plug per cylinder. There is no switching scheme. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||