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).
Continued discussion on issues with banjo washer seals, leak tracing, and oil flow through drip plugs in various weather conditions.
| Identifier | ExFiles\Box 27\1\ Scan071 | |
| Date | 16th February 1929 guessed | |
| contd :- -4- failures from this cause. (9) On the banjos we find the aluminium washers will not maintain an oil-tight joint, after disturbing them once or twice. We believe we shall overcome this difficulty, but shall be grateful for any experience you may have on this point, and the junctions in general. (10) In the last paragraph of your printed instructions you say a leak can easily be traced by the quick return of the plunger. In our experiments we have found that one or two drip plugs removed completely from a remote part of the chassis such as the shackle, make little difference to the rate of return i.e., we need some 60 lbs/sq.in. to force medium oil through the pipes alone, at the rate of 1 cc. per min. almost equivalent to a No.5. drip plug. However, provided the rate of flow of oil through the open-ended pipes is equivalent to, or greater than, the rate of flow of the drip plug at that point, the system should work alright. In cold weather, we suspect that oil will rather flow through plugs in a protected or warm position. In medium weather the system will work correctly; and in hot weather the warm plugs will again dispense more than the cold plugs. Is this surmise correct? Hs{Lord Ernest Hives - Chair}/F.Gaye. | ||