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).
The effects of an Aniline Dope additive in lubricating oil on engine bearings and carbon deposits after a 12,000-mile test.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page253 | |
| Date | 9th January 1933 | |
| γ 4057. To HL. from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c. Wor.{Arthur Wormald - General Works Manager} c. By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}9/KT.9.1.33. X5441. Re. Hl's Aniline Dope for Lubricating Oil. Test carried out on 2.PER.II. in France. We have examined the bearings and the amount of sludge and carbon in the engine after completing 12,000 miles. (1) We previously reported that we could not observe any smoother running of the engine after adding Hall's dope to the oil. (2) Carbon Deposit. The amount of carbon deposit on the cylinder head, and on the pistons, is as great as on any previous test. The amount of carbon on the underside of the inlet valves is more than previously experienced. There appears to be less sludge collected on the crank pins than on previous tests. Bearings. The condition of the bearings is poor. They do not give any impression of having received any benefit from the doped oil. We are of the opinion that our test does not show any advantage in the use of Hall's dope for lubricating oils. Hs{Lord Ernest Hives - Chair}/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} W. Hancock. | ||