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).
Progress report from France detailing issues with an oil pump, suspension wobbles, and undershields during vehicle testing.
| Identifier | ExFiles\Box 4\9\ 09-page214 | |
| Date | 21th April 1926 | |
| Hotel de France, Chateauroux, Indre, France. APRIL, 21st 1926 To "H.S." From G.W.H. 10 G.III. You will have seen from my daily reports that the oil pump brought from DERBY has been working satisfactory since we refitted it with the holes plugged up as you suggested. After we released one hole with no detrimental results, I concluded that it would be of interest to find how many holes could be opened out before we had signs of pressure failing. We have so far opened out threeholes in each gear wheel with quite good results. We shall continue to do this one hole at a time, until we find a definite oil failure. We are of opinion that more clearance could be given to the release valve guide which would make the oil pressure more certain. We have not sent in a full report at 5000 miles, this was because we were over the 5000 mark before getting the first report through, also we were hard at it most nights putting faults right. We did however take particulars at this mileage which we inclose. You will observe in our daily reports that slow speed wabbles have developped. I observed from taking down the N.S. pivot pin that the friction washers were steel upon steel. I was unaware that we had done away with the bronze friction washer. I should be much obliged if you would enlighten me on that subject. The steel washers were, when taken down tearing up, we smoothed these down with emery paper, and since fitting up we have not had any occasion to dismantled the pivots therefore we do not know whether the wabbles have developped from the failure of the friction washers. We shall at 7500 make a detailled examination. The report we sent in with regard to the engine side guards and gear box undershield will have to be revised. During the last few days of wet weather I took the opportunity to investigate upon these. By opening the bonnet and sitting on the wing, I was able to observe what was happening. The chief fault lies with the gear box undershield. At speeds of 40 to 50 M.P.H. the water and dirt is thrown upon the front flat [Handwritten note 1, left margin]: We could let him know? [Handwritten note 2, left margin]: We are looking into this | ||