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).
Technical note on curing engine magneto rattles using different spring settings and materials.
| Identifier | ExFiles\Box 4\5\ 05-page001 | |
| Date | 15th April 1911 | |
| copy of card. Y.430 15.4.11. 900 ENGINE MAGNETO RATTLES. Can be cured by having very slack slipper wheel i.e., 4 springs not adjusted tightly, but this allows crank to vibrate at higher speeds. The noise can be somewhat prevented by having 4 50 lbs. springs in spring drive. The movement of the spring drive with 4.50 lbs. springs is .030" on the driving side and .008" on the retard (tested with soft copper). On 1760 chassis with brass engine gears, this could not be cured with the weakest springs. H.{Arthur M. Hanbury - Head Complaints} Paper ones fixed EP.{G. Eric Platford - Chief Quality Engineer} 20.6.11. O.K. | ||