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).
Modifications to a Lucas ERS magneto and plans for future comparative testing.
| Identifier | WestWitteringFiles\Q\2April1927-June1927\ 110 | |
| Date | 19th May 1927 | |
| To R.{Sir Henry Royce} from EFC. c. PJ. Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} LUCAS ERS MAGNETO. X8793 One of the Lucas type ERS magnetos which we had for test has recently, at Messrs. Lucas' request, been modified by them to bring this up-to-date, and the machine is now again in our possession. From a preliminary inspection of this magneto, the only apparent modifications are :- (1) Provision of alternative bakelite moulded jump spark distributor and rotor which is interchangeable with the previous type carbon brush wipe distributor, which is also returned to us so that we can compare the two distributors. (2) Contact points which are undoubtedly of tungsten have been provided with a somewhat increased spring pressure on contact. These modifications appear to be just those which would overcome the troubles we have experienced with the carbon brush distributor and contact breaker points respectively. The usual tests will in due course be made with this magneto and the results compared with the tests of the new sleeveless type Watford magneto when this latter becomes available. EFC. | ||