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).
Engine test conditions and checking procedures.
| Identifier | ExFiles\Box 69\4\ scan0276 | |
| Date | 25th September 1924 | |
| -3- EXPERIMENTAL REPORT. Expl. No. REF Hs{Lord Ernest Hives - Chair}/ACL/LG6.2.25. Water temperature (top) during these tests should be maintained at 80°C. The oil pressure should be not less than 30 lbs.sq.in. at the high speeds, but when the oil is hot in the engine throttled down to low speeds, the pressure will probably fall. It should not fall below 20 lbs.per sq.in. under these conditions. WATER FLOW. Should it be thought necessary to check the water flow through the system, the flow meter should be inserted in the bottom water pipe. If desired, we can supply curves for the water flow. CHECKING ENGINE DETAILS. The valve and ignition timings should be checked before tests are made. We give a diagram which shows the valve timing when the tappets are set at .020" but normally, the timing is set and checked with .010" clearance according to the marks on the flywheel. It must be clearly understood that the clearances stated above are only for checking purposes and not the actual tappet clearances used under running conditions. It should be only necessary to check the timings of cylinders 1 and 6. The compression ratio of the engine should be checked by filling the combustion space with water when the piston is on T.D.C. For this test remove both sparking plugs and both valves should be shut. The water should be carefully contd :- | ||