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).
Proposed design modifications for engine components, including water circulation, crankcase, and drives.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan115 | |
| Date | 13th April 1931 guessed | |
| (2) 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 steam pockets, 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 lower 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 device accessible without other special provision. UNIT DRIVES. It was agreed that the fabric couplings can be driven by simple through bolts from the spiders provided that there is a metal ferrule or its equivalent passing through the fabric to carry the bolt load and allow the bolt to be done up tightly. This does not apply to large couplings. RHC.{R. H. Coverley - Production Engineer} is to report on the necessity for a metal to metal centre-ing scheme to ensure true running of the coupling tube. Mild steel straps nickel plated will be used for securing the dynamo. The scheme of adjusting washers on the dynamo drive pinion will be deleted and the pinion will be lined up and adjusted for end float by shaving the faces of the bushes in a suitable fixture on the bench. | ||