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).
Ignition contact breaker point tests, comparing Delco-Remy and standard components.
| Identifier | ExFiles\Box 35\6\ scan 308 | |
| Date | 26th August 1927 | |
| Contd. -4- EFCL/T26.8.27. No.31. Delco-Remy with purposely exaggeratedly mis-aligned screw point. RR. ignition circuit. In this case the Delco Remy contact breaker with flat tungsten points purposely set to be touching on the edge only were run with the standard RR. system, including condenser. The result was satisfactory bedding extending all across and only a suggestion of a pip and hollow being formed. Moreover the contact surfaces presented a pleasing grey appearance, as distinct from getting blued and blackened. Sample labelled 31. The bedding of the contact points was observed to go through phases like the moon. N.B. It will be noted that there is on the Remy lever a small spring tongue projecting from the back of the lever, reaching to and pressing upon the brass pivot bush. We cannot see the functioning of this spring projection, and it is difficult to understand it to have any effect. One feels, however, that it would not be put there for fun. On our own lever we have no such feature. As a control experiment we are running flat and correctly bedded tungsten points under otherwise standard conditions on the RR. breaker. In addition to the above we are sending you a sample platinum point labelled 8-EX which ran 13320 miles with present standard coil, but with double value ballast resistance, concerning which a report will be issued. These points were trimmed once at 7000 miles. The condition is fairly good, but is nowhere near as good as obtained with current reversals. There is also a sample tungsten point labelled 9-EX which ran 13905 miles and was trimmed twice, at 5500 and 11000 miles. A further test of the scrubbing action to Lec.2422 together with alternative springing, but this time without | ||