Recommendations for improvements to engine components including water circulation and the crankcase.
| Identifier | ExFiles\Box 5a\1\ 01-page100 | |
| Date | 13th April 1931 guessed | |
| (2) that all cyl. stud boss faces and rocker bracket faces shall be brought flush with the face for the rocker cover. In addition to saving work this move improves the quality of the production at the expense of a slight increase in weight. The internal drip lip and metal to metal joint for the rocker cover has not proved successful on our present engines. Leakage of oil and fidgeting of the cover led to the introduction of a cork washer. We now propose to eliminate the lip together with the machining it demands on the inside of the head and rely whole-heartedly on the cork washer stuck on with adhesive to the cover as is generally done. The cork washer will be made wider and if the rocker cover face can be die cast flat an external lip will be provided to retain and protect the washer. WATER CIRCULATION. We are recommending that the water circulation be so arranged that the whole of the water flow is taken through the cyl. head from one end to the other so that the full scouring action of the circulation will be available for clearing out stem packets and avoiding the formation of hot spots. It is thought that this may be advantageous in reducing corrosion where inserted tubes are used. With this system preferably external water couplings would be used on each side of the head to the cyl. block at the rear end, and the water pump would discharge into the front end of the block. A drainage plug would be required at the lowest point in the water system at the rear end of the engine but this is not an unusual feature on many modern engines. No water would be taken through the gasket. LOWER HALF CRANKCASE. We do not feel that the present design for the J. {Mr Johnson W.M.} 3. engine lower half makes a sufficiently simple casting with integral strainer and we dislike the absence of any provision for cleaning out sludge other than by complete removal of the low half. We think that these objections could be overcome by providing a large door on the bottom for the accumulation of sludge and through which a separate strainer could be fixed, and that this would also render the oil level | ||
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).