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 from North & Sons Ltd. regarding the materials used for specific Watford Aero Magnetos.
| Identifier | ExFiles\Box 43\4\ Scan208 | |
| Date | 14th January 1930 | |
| X4021 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, CROWN AGENTS FOR THE COLONIES, INDIA OFFICE. TELEGRAMS: AEROMAGS WESTCENT LONDON. AEROMAGS WATFORD. EXC Ref. CHK/HWJ. Your ref. EFC1/AD. 14th. January 1930. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, Watford Aero Magnetos. We thank you for your letter of the 10th. instant confirming our conversation regarding various aircraft magnetos. With regard to the two magnetos S.P.12-5 Nos. 98087/8/9/90 we beg to say that all parts usually made in aluminium are made in Magnesium Alloy, in these four magnetos, with the exception of the tunnel, or pole shoe housing, which includes the spigot and flange, and is in aluminium. Yours faithfully, p.p. NORTH & SONS LIMITED., Managing Director., | ||