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).
Test results and recommendations for the optimal method of extra cylinder lubrication.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan082 | |
| Date | 5th February 1930 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} (Held up). c. to A.{Mr Adams} Wor.{Arthur Wormald - General Works Manager} c. to SG.{Arthur F. Sidgreaves - MD} By.{R.W. Bailey - Chief Engineer} EXTRA CYLINDER LUBRICATION. Further to our Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/AJ3.1.30. We have now completed our tests to determine the best method of getting the extra oil round the cylinder bore. We find that when the oil is fed into the cylinder bore centrally, in the plane of the connecting rod, as on cylinder 3, the oil only lubricates the side of the piston where it is introduced and the other portions of the piston remain dry for four or five minutes after starting up. If, however, the oil is fed in 'off centre' as on cylinders 1 and 2, as soon as the piston uncovers the orifice, oil falls on the ascending crank web and is thrown on to the opposite cylinder wall. This clearly cannot occur when the oil hits the connecting rod as on cylinder 3. We therefore recommend that the oil should be fed into all cylinders off centre. As far as we can judge a supply of 8 cc/min/cyl. with the oil in a cold condition is just about the minimum to ensure adequate lubrication for the warming up period. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} [Diagram label: No.3 Cyl.] [Diagram label: No.1 Cyl.] [Handwritten number: 17980] | ||