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).
Broken top spring washer on Large Bore Bentley and 25-29 HP engines and proposing a strengthened design.
| Identifier | ExFiles\Box 88\4\ scan0149 | |
| Date | 14th November 1935 | |
| x254 Rin L.P. Smelt Do you agree? Cost? Rin E/JNR.{Charles L. Jenner}1/HP.20.11.35. BY.{R.W. Bailey - Chief Engineer} c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} re Large Bore Bentley and 25-29 HP. - ref.Hs{Lord Ernest Hives - Chair}/Smth.25/KW. 14.11.35. In regard to the broken top spring washer on the endurance run, the proportions of this washer have been unchanged for years, and was designed when the spring loading and the speed of the valve gear was very much less than under the present conditions. We send you herewith LeC.4812 showing the washer strengthened by making the top recesses smaller in diameter. The amount of additional metal is slight. Will you please instruct these washers to be used in conjunction with the larger diameter valve stems. E/JNR.{Charles L. Jenner} | ||