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).
Promising hydraulic tappet design, its proposed road testing, and comparison with the Cadillac design.
| Identifier | ExFiles\Box 158\5\ scan0084 | |
| Date | 25th April 1934 | |
| C O P Y. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KW.25.4.34. HYDRAULIC TAPPETS. -------------------- We appear to have a hydraulic tappet that is promising. In its present form and dimensions it is well worth running 10,000 miles on the next 20/25 or Bentley to get extended road experience. We consider that the results so far obtained justify consideration being given as to how the parts can be lightened and the valve gear improved, so that we can get the maximum benefit out of the development. The scheme is outstandingly cheaper to manufacture and easier to apply than the Cadillac design. It will be observed that we have departed considerably from Major Halford's original recommendations. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Att: Report ref. Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}2/KW.25.4.40. | ||