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 Messrs. North & Sons, Ltd. requesting clarification on the correct type designations for aero magnetos.
| Identifier | ExFiles\Box 43\4\ Scan214 | |
| Date | 31th January 1930 | |
| X4021. EFC1/AD. 31st January, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Aero Magnetos. There is some little confusion here regarding the correct type designations of the aero magnetos. It would be a convenience to us if you would give us officially the correct type designations of your various aero magnetos and the features of construction corresponding respectively to these. The confusion has mainly arisen between the IS.12 and SP.{Mr Spinney}12-2 types. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||