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).
Issues and fixes for oil leaks from damper glands, wind noise, and valve clearance loss.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page150 | |
| Date | 15th December 1932 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From G.W.H. X4057 Hotel de France, Chateauroux, FRANCE. 15.12.32. 2.PER.II. RE. OIL LEAK FROM DAMPER GLANDS. The most successful job we have made so far has been obtained by fitting a thick paper washer round the steel bush which projects into the gland cover. This bush, which is the bearing for the shaft, extends as a spigot, and should locate the gland cover. There is approx. however, a gap of .006" or .012" on the diameter. The oil had not been getting past the actual packing, but had been leaking past the first face of the packing through the space of the spigot, and out through the distorted face of the gland cover. If the design of the gland cover is strengthened to prevent distortion, this would not occur. The oil proof rubber ring and the cork washers fitted to this gland appear to be satisfactory as no oil had got past the gland packing. The other dampers have got the non oil proof rubber packing which has deteriorated, and as the oil proof rubber is satisfactory, we do not think any valuable data would be obtained by packing with asbestos. The leak of oil from the dampers has not been sufficient to cause any loss in poundage. To obtain the actual loss for each damper, I instituted the following procedure. Four small bottles were labelled for each respective damper, and a quarter of a pint of oil placed in each bottle. This amount has not as yet been used. The N.S.R. has used two thirds; O.S.R. half; N.S. & O.S. front practically nothing during 6000 miles. We can therefore tell at a glance which damper is losing the most. RE. WIND NOISE IN FRONT OF BODY. We have tried unsuccessfully to overcome this objectionable noise. We fitted a straight piece of wood across the front with the idea of altering the direction of the wind over the top, but as stated got no improvement. RE. SLIGHT LOSS OF VALVE CLEARANCE. This had been caused by the valve having hammered into its seating. | ||