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).
Lubrication of crankshafts for aero and car engines, including proposed modifications.
| Identifier | ExFiles\Box 65\4\ scan0229 | |
| Date | 28th April 1928 | |
| X8010 RG.{Mr Rowledge} from R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} c. to BJ. BY.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} FI. R6/M28.4.28. AERO. & CAR ENGINES. X.8010 X.3865 LUBRICATION OF CRANKSHAFTS. X.5010 X.2463 This matter was discussed and it was agreed that it should go on in exactly the same way as WW. has arranged for the car engines, and as instructed in crankshaft drg. LeC.2545, and the bearing drg. LeC.2550, making three holes for the journal and so arranged to give 6 intermittent jets per rev. for each crankpin, (entirely independent of its neighbour). We have now instructed this scheme to be tested on India, Phantom F.{Mr Friese} engine and H.{Arthur M. Hanbury - Head Complaints} engine. No other scheme is to be tried until this is shewn to be a failure. There is an entire absence of oil grooves on the surface of the bearings, and the oil pressure is kept away from the joint in the bearing as much as possible, therefore we have the minimum leakage for the maximum pressure at both crankpin and journal. We understand that exhaustive tests have already proved that the little end is well lubricated from the spray without the cyl. walls or scraper rings, but we propose to add this latter where possible. There is a modification to the big end so that the liner is .075 thicker in the steel opposite the superposed rod, and only 4 lubricating holes through the liner at 45° from the joint. We may have to modify this, and I should suggest if it is found necessary to use an oil feed 45° we should groove the face of the joint because it is very difficult for all these faces to be oil-tight, so we might avoid the variation by definitely making it into an oil feed to the superposed rod. R.{Sir Henry Royce} | ||