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).
The examination and condition of various vehicle components after testing, including engine, axle, and springs.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan95 | |
| Date | 20th May 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: CWH2/Cm20.5.25. examination and was found choked with dirt. We have cleaned this and refitted it. Oil relief valve unit - this is fitted up with springs as previously reported. We found that the main oil relief valve was not working satisfactorily, the valve seating not being very good. After making this O.K., we now get a pressure of approx: 18 - 20 lbs. on our runs. Leak from oil relay drive is approx: the same as previously reported. We have examined the piston, and the leather washer is in very good condition. (This leak is not in any way excessive, but it is there). This, as you will see in our report, has done 10,000 miles. Leak of oil from centre bolt on top of crankcase - we took out the bolt when changing pistons, but could not find any cause for the leak! After cleaning, and re-fitting, no further leak has occurred. Filter on bottom half taken out and examined. This was clean, but on the cover particles of sand were found. We take every precaution with our oil, and cannot account for this. TAPPETS - we reset these after the first day's run, after which the setting keeps fairly even. The engine generally is clean and free from oil leaks. Exhaust boxes - these are O.K. FRONT AXLE. Modified axle pivots to N.sch.1895 - these appear to be quite O.K. Modified operating shafts with larger bearings to N.sch.1895 - there is now slight wear noticeable. Pull rods operating front brakes - these, as stated previously, are slack and cannot be adjusted. The design of these should be altered to accommodate this wear. There is also slight wear taking place on cross operating shafts bolted to front axle. FRONT ROAD SPRINGS. The springs fitted, as previously stated, have now run :- O.S.F. 3,212 miles. N.S.F. 3,962 miles. They are quite O.K. We would like to draw your attention to the springing of front road springs. We have noticed during the test that after approx: 5,000 miles the flexibility of the front springs is very much reduced. This flexibility cannot be brought up again by the greasing of the spring leaves. The front of the car in this condition rides very dead. After we had fitted the two new front road springs, the flexibility of the front springs was very noticeable. UNDERSHIELD. We cannot improve upon our previous report. EXHAUST SILENCERS. The lagging on the front silencer is now | ||