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).
Condition report on various engine components, including details on an oil leak and exhaust system modifications.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan246 | |
| Date | 2nd December 1925 guessed | |
| - 2 - Periods. The periods of the engine have not noticeably altered since our previous report. Engine gears. These are still in good condition. No rattles have been noticed. Engine case. As previously reported, a slight oil leak has developed from water pump drive bearing. This leak increased during the continuation of the run. We dismantled the water pump & drive to ascertain the cause of the leak. We found that the distance washer between the ball race & the water pump drive bearing was slightly too thick, i.e. .010", which was keeping the flanges apart, thus allowing the oil coming through ball race to escape by way of the threads of nut. We also noticed that there is a slight oil leak from ball race housing where same is fitted to the gearcase. We reduced the thickness of the washer & made the joint oiltight, which necessitated drilling a new hole for the locking ring. We have no further oil leaks from engine case, & it appears to be in a sound condition. Water pump & drive, to L.O.P. E.70527. The water pump is fitted with standard Lion packing. The water pump drive is in good condition, & water pump has functioned satisfactorily. We have had no water leaks from pump. Controls, to L.O.P. E.72843 & L.E.C. 2118. These are still in good condition. Induction pipe & carburetter. The induction pipe is still in good condition. We have had no trouble with the carburetter. We have not examined filters at this mileage. Calorised exhaust down pipes, E.72868/9/70. We have had no trouble with the exhaust pipes during the continuation of the test. The front exhaust pipe was made so that it could not distort sufficiently to cause the previous trouble. We have since received a new front exhaust down take pipe, which has been fitted. The intermediate pipe between front silencer & first down take pipe has been flanged over, at sliding joint end, so that it is impossible for this joint pipe to come out of joint. We have allowed for half an inch of distortion. The condition of the pipes has remained good. Exhaust boxes. These have remained in the same condition, as stated in our previous report. Exhaust silencers. The rear exhaust silencer is fitted with concentric tubes, & is not lagged. The condition of the silencer still remains good. The front silencer is in the same condition as previously reported. Silencer brackets are still in good condition. | ||