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).
Instructions on magneto wire windings and contact breaker timing for improved performance.
| Identifier | ExFiles\Box 43\4\ Scan136 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD{Mr Wood/Mr Whitehead}2 contd) .19 Order No. Customer's No. large number of turns of fine gauge wire whereas a lesser number of turns of a coarser gauge would be better. There was observed a slight difference in the contact breaker timing between the two magnetos, and the effect of this could be discerned in the subsequent testing of the electrical performance, the magneto (N098033) with a larger make-ratio and timed earlier giving a better low speed performance whilst not losing much at high speeds i.e. the high speed performance still being good. The weight of these magnetos complete with screen is approx the same as the latest lightened type Signed (contd) This Sheet must be filed on completion of the work. | ||