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).
Axle oil levels, oil types, and investigations into pinion tooth failures.
| Identifier | ExFiles\Box 136\5\ scan0248 | |
| Date | 29th April 1930 guessed | |
| (2) (1) That low oil level running will not damage the axle. We think that it is impossible for half the oil to vanish without some external evidence of leaks and we have seen no such leaks on the axle. (2) That the thick Whitmore's oil is quite satisfactory with half the normal quantity of oil in the axle in zero weather. We think that this information confirms the hundreds of hours road and bench tests that we have given these axles, and indicated that we should not prematurely hurry to change the type of oil in the axles or its level to any great extent. As if we do so, we shall possibly run into some new trouble without having cured the present axle failures. We are now trying different types of teeth to see if one particular type is likely to fail. All recent failures are at the toe of the pinion on the driving side of the tooth. HS{Lord Ernest Hives - Chair}/BH. | ||