Ignition plug and switching arrangements for the 40/50 & Goshawk models.
| Identifier | ExFiles\Box 33\3\ Scan243 | |
| Date | 1st January 1923 | |
| X1812 l. To Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} c. to CJ. Wor. {Arthur Wormald - General Works Manager} c. to FN. OY. c. to BJ. BY. {R.W. Bailey - Chief Engineer} c. to E. {Mr Elliott - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} R1/140.1.23. RE. IGNITION - 40/50 & GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) X.1413. X.1812 X.4560. Naturally we cannot get much advantage from the use of the small plug until several makes are available, but it has occurred to me that since we cannot get 2 large plugs in the Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)), we might adopt one large plug, and one miniature plug. Wherever the car was located there could be no cause for stoppage, the owner would be as well off as at present. At the same time if we took the trouble to pruchase small plugs he could have both his ignitions wired up constantly. If it was found preferable to use all small plugs, the hole in which the large plug was usually fitted could be fitted with an adapter for a small plug. X.1413. With reference to the switching arrangements I think that when the magneto is fitted we ought to have an auxiliary switch that will cut out either of the ignitions. I think this is an absolute necessity on the 40/50 and would enable us to adopt the locked switch box without losing the advantage of the locking of the ignition, because the auxiliary switch can, and should, be arranged so that it cannot make either ignition work when the locked switch is in the off position. It is really only a switch for putting out either ignition, putting out the battery ignition by an extra break, and putting out the magneto by an extra earth connection. We will design a switch as soon as possible for the above combination. R. {Sir Henry Royce} | ||
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).