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 Scintilla Ltd. detailing changes in magneto requirements, including rotation and advance curve.
| Identifier | ExFiles\Box 48\2\ Scan052 | |
| Date | 23th February 1924 | |
| X 4187. EFC {E. Fowler Clarke - Electrical Engineer} 2/LG. 23rd. Feb. 1924. Messrs. Scintilla Ltd., Wellington House, Buckingham Gate, London, SW1. Dear Sirs, We thank you for your letter dated 22nd. ref: S/97/Sh. in answer to our EFC {E. Fowler Clarke - Electrical Engineer} 3/LG. Developements have now occurred which render the previously desired departure from the originally advance curve of your AM6-A Magneto unnecessary - so that what we now require is merely the reversed rotation, for instance, anti-clockwise, instead of clockwise as in the original sample magnetos received from you. We would have preferred the automatic advance to start a little earlier than 450/500 which you state (it will be remembered we asked for a neighbourhood of 300) but we are now content for the maximum advance 35° to be reached at a speed of 3,300 as previously. Trusting this change of requirements will not have inconvenienced you in any way. Yours faithfully, | ||