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).
The bench testing and examination of a distributor and its contact points after a simulated run.
| Identifier | ExFiles\Box 163\7\ img135 | |
| Date | 20th October 1930 guessed | |
| -4- piercing the rubber insulation. A moulded cap also provided with corresponding grooves is then screwed down over the wires. This arrangement allows all the wires to come out from one side of the distributor, makes it waterproof, dispenses with terminals and gives the distributor a clean and neat appearance. The whole distributor was fixed up on our bench rig and connected up to an R.R. coil and ballast and run an equivalent of 10,000 miles on the chassis, at 700 r.p.m. An examination of the contact points and the distributor head at the conclusion of this run shewed that considerable burning had occurred on the H.T. brass inserts and rotor finger; we consider brass to be most unsuitable for this purpose. The tungsten contact breaker points did not appear to have performed very well, bedding only having been established over 75% of the surfaces and a considerable pip (relatively) on the lever point with a corresponding cavity on the fixed point was observed. The condition of these points was not as good as we obtain on our standard distributor.with the exception that on the Delco-Remy oxidation was entirely absent, nor are they as good as the previous Delco-Remy set tested in 1925. Apparently there is not the amount of flexibility which is required to maintain good condition of the points | ||