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).
Suggestions for the improvement of operation of platinum or tungsten ignition contact points.
| Identifier | WestWitteringFiles\Q\2April1927-June1927\ 106 | |
| Date | 18th May 1927 | |
| To R.{Sir Henry Royce} from EFC. c. BJ. PN.{Mr Northey} c. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} c. Wor.{Arthur Wormald - General Works Manager} CY. c. BY.{R.W. Bailey - Chief Engineer} ORIGINAL IGNITION CONTACT POINTS. X4652 X2896 We give below list of various suggestions for improvement of operation of platinum or tungsten points, the reference numbers corresponding to and following on from those used under cover of our original report EFCl/T24.12.26 on this subject. (10) Altered position of contact breaker points in relation to cam. Results under this head for both tungsten and platinum were given in the report referred to. (11) Running ignition with distributor removed. One test of tungsten points under this heading shewed slight improvement, as reported in EFCl/T24.k2.26. Further tests will be made with both platinum and tungsten points as requested in (1) of your R2/M16.5.27. (12) Reynold points on Delco-Remy contact breaker. The result of this test, reported in EFCl/T24.12.26 we considered to be as good as anything ever obtained. (13) Increased mechanical contact pressure. Experiments on the alternative springing referred to in R2/M16.5.27 may be considered apparently to come under this head. (14) Double or maximum value condenser. So far this has only been done on tungsten as reported in EFCl/T24.12.26, but the result was not very conclusive either way. We are preparing to run, as the next pair of tests, two cases of this, both for platinum points under slightly different conditions, as requested in (3) of R2/M16.5.27. (15) Periodic reversal of current. Cases of this were reported for both platinum and tungsten in our EFCl/T19.1.27. The improvement in the case of platinum was quite marked, but not so much for the case of tungsten, the period of reversal in our previous tests being every 24 hours. We are now making arrangements Contd. | ||