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).
Analysis of component wear, including valve material specifications and test results.
| Identifier | ExFiles\Box 124\2\ scan0206 | |
| Date | 5th July 1940 | |
| -8- Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}4/JMS.5.7.40. 3) Wear. In customers hands. (a) Thous' per 1000 miles of various series of units (quote different "set-ups"). (b) If possible, separate (a) into types of driving. (1) London traffic. (2) Country (long distance runs). (3) Paris depot results (For some reason (3) does not match up with either (1) or (2). (c) Rate of Wear. Thous' per 1000 miles against increasing mileage (in stages). (d) Characteristic of Wear. Photomicrographs of sectioned worn portion of cylinder. VALVES. Inlets EB.3853. (Matl: S.65) (Motor Components) Exhaust EB.5210. ( " KE.965) S.65. Carbon 0.22 - 0.28 Silicon 0.30 Manganese 0.35 - 0.65 Nickel 2.75 - 3.50 Chromium 1.00 - 1.40 Molybdenum up to .4 TESTS. Tensile 65 - 70 tons. Elongation 20% R.{Sir Henry Royce} in A.{Mr Adams} 50% Izod 50/60 ft/lbs. D.T.D.49 (KE.965) Carbon .4 - .45 Manganese .6 - .8 Silicon 1.25-1.5 Continued, | ||