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).
Magneto fitment and the development of a battery ignition system for the 'Eagle' aero engine.
| Identifier | ExFiles\Box 37\1\ scan 009 | |
| Date | 26th April 1917 guessed | |
| 2. The Controller Contd. 6. We understand this new model will be fitted with suitable holes in the base for standard steady pinning arrangement to the base, but these steady pin holes and the height of the magneto centre will be sufficiently accurate to give good alignment between the magneto and its driving shaft, and that the magnetos will be interchangeable on a reasonably accurate base. 7. Regarding the battery ignition for future "Eagle" aero engines, it was discussed that the battery ignition would not be sufficiently well made by adopting the Remy or any other existing commercial ignition systems but it is advisable for ourselves and the Ignition Dept. of the Admiralty to modify the existing designs or provide a new design that will thoroughly meet the case and produce a thoroughly substantial device which showed no unnecessary overhang on the camshaft casing, and that certain modifications shall be made to the bevel wheel casing so that early Eagle engines shall be sent out with the necessary preparations for applying this ignition system after the engine has been delivered. This batter ignition system has to be arranged to run the engine up to the full overspeed without missing fire, and to be capable of enabling the hand magneto to be dispensed with if desired. Commd. Bristow was shown while here the designs that we had already produced and which appeared to meet with his approval, and which could be constructed under the control of the Admiralty, Magneto Dept: or at the R.R. Works where there is some capacity for this work, which , at present, has not been taken full advantage of. We are proceeding with these designs as rapidly as possible and expect to send a preliminary drawing to Derby for experimental parts to be made therefrom in the course of the next seven to ten days. R.{Sir Henry Royce} | ||