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).
Series of tests on oil supply, lubrication performance, and oil loss.
| Identifier | ExFiles\Box 105\3\ scan0094 | |
| Date | 27th March 1930 guessed | |
| (2) well lubricated. Very little oil escaped to the outside of the outer tube. TEST 5. REDUCED OIL SUPPLY. At this point we reduced the oil flow from the drip plug from 4 to 1 drop per minute and repeated Test 4. After first making sure that the oil was dripping from the lever ball pin, and running for ten minutes, we found that the oil had reached all four pads. TEST 6. THREE FLATS BUT NO GROOVES IN SEATS OF "B" & "C". Repeated Test 5 with grooves in pads. After ten minutes "A" and "B" were found to be lubricated, "C" was dry, and there was just a film of oil on "D". LOSS OF OIL ON DRIP PLUG AND BALL PIN. We first attempted to measure the loss by timing a number of "drops" released at the drip plug and the lever ball pin, but found that the ball pin released two drops to one from the drip plug in approx. the same time. We then measured the quantities delivered at both points during periods of ten mins, thirty minutes, and two hours. The results varied from 0.2 to 1.0 grammes/hour. We also took a test with the intervals of the drip plug removed, and obtained a figure of 301 grammes/hour. These tests were taken with the damper full of compressor oil, as fitted on the chassis. A test was then taken with the damper dry and the piston and end cover removed, so that we could see inside the casing whilst the test was in progress. From this we obtained a figure of 0.5 grammes/hour and we could see the oil in the casing, thus proving that there is a loss past the bearing. W. Bell. | ||