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).
Analysis of external pressure cylinders, glands, and dampers, noting their condition and weakest features.
| Identifier | ExFiles\Box 179b\3\ img054 | |
| Date | 19th January 1933 | |
| -3- Hs{Lord Ernest Hives - Chair}/VB.8/KT.19.1.33. The external pressure cylinders were also O.K. Evidently the loading screws on the front dampers had just fouled their respective anchorages - corresponding signs were traced on the anchorage brackets. Glands. These were of the straight faced cork-rubber-cork type, and had taken a permanent set of approx. .145" over the total free length in each case. The corks had collapsed - the outer more than the inner - whilst the rubber had expanded slightly in width, and roughly .300" in diameter. It is interesting to note that the oil resisting rubber packing, fitted in France to the N.S. rear - had expanded practically the same amount as the ordinary rubbers which were initially fitted in these dampers. The gland cover faces were distorted, leaving gaps of .02" to .03" at the centre in three instances, and .008" on the N.S. rear. In the latter case the cover had been pressed on over a vellumoid washer to prevent leakage between the joint faces of the cover and the casing. This was done whilst the car was in France. Incidentally these gland covers were the original "weak" type. SUMMARY. The two weakest features of these dampers were the glands, and the biting-in bolts, which presumably stretched, allowing the levers to fidget on the shafts, subsequently damaging the locating keys. Hs{Lord Ernest Hives - Chair}/V.Bell. | ||