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).
Aero engine thrust washer tests, bevel pinion bearing faults, and known electrical equipment issues.
| Identifier | ExFiles\Box 182\M16\ img025 | |
| Date | 1st June 1921 | |
| Contd. -2- It will be remembered that on the aero engine we went to the expense of making the shaft and the thrust washer tapered in order to try and prevent them from turning. We have not noticed or do we think that the double thrust, even though it turns round, that there will be any appreciable wear take place. We recommend, however, we should increase the area of the faces which are effected so they will better be able to resist wear. We are still continuing our tests using the large journal bearing to take the reverse thrust. We have so far completed 30 hours running on the reverse on the dynamometer. We found, that when we examined it the last time, the nut holding the thrust washer, which still takes the forward drive, was loose. This rather points to the fact that using the ball thrust to take the forward thrust, we have still got to anticipate that the thrust washer will turn round. We are fitting cars we have at the works with the scheme using the journal bearing to take the thrust because this seems the most practicable we can fit quickly. We wish everybody to be aware, however, that we are sending out cars which are definitely faulty as regards thrust bearing for the bevel pinion. Something should be done and done quickly in order to overcome this fault. Another item in which the reduction in out-put will effect very necessary improvements, is the electrical equipment. The faults with the present electrical equipment fitted to our own cars are, of course, quite well known. We have admitted them for months and months. From our experience they are as follows:- contd:- | ||