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).
Test results for different tungsten ignition contact points.
| Identifier | ExFiles\Box 35\6\ scan 370 | |
| Date | 24th November 1927 | |
| X8692 To R.{Sir Henry Royce} from EFC. c. BJ. E⚷ c. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} EFC2/T24.11.27. TUNGSTEN IGNITION CONTACT POINTS. Herewith we send to you two further results (screw points only). One of these is a further case of LeC. 2461 but run with the standard lever in place of the off-set lever, but with the same thickness of steel arm as previously. The result is equally good with the previous one to LeC. 2461 and shows no advantage from this point of view on the off-set lever. This represents the third test run with the new type of springing with reduced stress. A second sample sent to you is the result of test of a scrubbing scheme which we had arranged for previous to the receipt of LeC.2460/1. The exact arrangement which was run is contained on the attached print. This also has given a very fair result, and we think a little fairer than the results we have obtained with LeC.2461, though approximately equally good with those obtained with LeC.2460. Now referring to your R3/M22.11.27, the LeC. had already called for a thicker anvil, viz. .080" in place of .064" and one of these (.080") we have running at the moment. We are, as requested, also instructing a .050" anvil, but in this case we are suggesting that we should double it over at the screw point portion to provide a better thread for the point. Contd. | ||