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).
Design of Bentley Hydraulic Tappets for a 25-HP engine.
| Identifier | ExFiles\Box 88\4\ scan0133 | |
| Date | 15th March 1935 | |
| 4254 To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} E/JNR.{Charles L. Jenner}1/HP.15.3.35. [Handwritten initial 'Rm{William Robotham - Chief Engineer}'] re Bentley Hydraulic Tappets. We send you herewith:- LeC.4412 which is the main scheme for the 25-HP. engine fitted with hydraulic tappets. The Administration have decided that this work should not be proceeded with. However, on this drawing there are three units which should be incorporated on the Bentley design of hydraulic tappets which you are dealing with. They are:- (1) The filter unit. (2) The low pressure valve mounted on the wheelcase. (3) The helical gear oil pump and relief valve. It will be noticed that we have increased the size of the pipe for the overflow oil from the pump. We think this is necessary as on the Bentley cars fitted with large oil pumps to LeC.4288 the pressures recorded indicate a possible restriction in the blow-off valve and pipe. LeC.4412 attached. E/JNR.{Charles L. Jenner} | ||