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).
Points of oil leakage from engines and suggesting potential improvements.
| Identifier | ExFiles\Box 74\3\ scan0115 | |
| Date | 15th April 1921 | |
| Hs.{Lord Ernest Hives - Chair} from EP.{G. Eric Platford - Chief Quality Engineer} e.{Mr Elliott - Chief Engineer} to Da.{Bernard Day - Chassis Design} (struck through) e.{Mr Elliott - Chief Engineer} to By.{R.W. Bailey - Chief Engineer} (struck through) c. to E.{Mr Elliott - Chief Engineer} c. to Sft.{Mr Swift} (struck through) X3908 RECEIVED EP{G. Eric Platford - Chief Quality Engineer}11/F15.4.21. F.R. RE. OIL LEAKS FROM ENGINES. This feature has been the cause of complaints from several customers, and although not very serious, we have to admit that there is a certain amount of oil leaking from the various fittings of the engine. The points for consideration so far as design, manufacture, or inspection are concerned, and to which I should be glad if attention could be given, are as follows :- 1) That the breather capacity of the crankchamber could be improved to advantage. (handwritten) leakage passed the piston does take place even although rings offer a good job. 2) Magneto advance shaft passing through the crankchamber. A better oil retaining scheme might be applied to advantage at these joints. The present scheme appears to work as well as can be expected, and oil does not pour out of these joints but rather oozes through them. For immediate consideration I suggest that the clearance of these bushes should be reduced. At present the minimum limit is .004". I think this clearance could be reduced so long as the bushes were reamered in position with a piloted reamer. 3) There is a tendency for oil to be pumped out of the tappets. 4) The face joint between the tappet bearing and the crankchamber could be improved to advantage. Could a paper joint be considered? 5) Even although paper joints are used for the rocker arm doors, we still have leakages, and I feel that the face of these joints can be improved, apart from the paper joint which is being used. 6) The face joint between the cylinder, liners, and crankchamber could be improved to advantage. Also, could not paper joints be considered? EP.{G. Eric Platford - Chief Quality Engineer} | ||