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).
Battery ignition contact breaker unit for 20 HP and 40/50 HP models, focusing on modifications and the position of contact points.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan170 | |
| Date | 18th September 1926 | |
| To R.{Sir Henry Royce} from EEC. c. E.{Mr Elliott - Chief Engineer} BJ. c. By.{R.W. Bailey - Chief Engineer} ORIGINAL EEC3/T18.9.26. RR.BATTERY IGNITION CONTACT BREAKER UNIT 20 HP. and 40/50 HP. X2894 x5690 X8190 x428 It has been suggested that we might have a felt packing washer over the top distributor bearing to assist in the exclusion of oil vapour, and to accommodate surplus oil from that supplied to the bearing. Relative position of cam and contact points. We have a certain amount of experimental evidence, though it would scarcely seem probable on the face of it, that the position of the platinum points in relation to the cam and rubbing block is of some consequence and in particular that it would be better if the contact points worked in a position away from the tangential line of the rubbing of the cam on the block. They work in such a position on the Delco-Remy ignition contact breaker, and we cannot see any other reason why Delco-Remy should thus have made their rubbing block so deep but to secure this result. We are carrying out an experiment in this direction on the RR. breaker. In the meanwhile we have a test running of British tungsten contact points fitted to the Remy contact breaker, but otherwise running on our own standard ignition system, and so far they are running very well. The only difference other than the contact breaker is the fact that the Remy distributor is of the wipe contact type and this possibly may have something to do with the better functioning of the points. EFC. | ||