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).
Test report on engine components detailing performance issues, part substitutions, and investigations into oil leaks and noisy valve gear.
| Identifier | ExFiles\Box 108\1\ scan0190 | |
| Date | 10th September 1937 | |
| 2. Crankcase and bearings LOP. EE. 1113. (Struck through) Ex.26)73/4/5/6/7 Main bearings in W/M.{Mr Moon / Mr Moore} Connecting rods LOP.L.60840. (Struck through) Ex.28171. Big end bearings A.C.6. Single centre hole in top half. Crankshaft LOP.EE.911. (Struck through) Ex.912 Crankshaft V.C.M. Extra and opposite hole in each crankpin .125" diameter. Existing hole sleeved to .125" diameter. The bearings gave no trouble during the running. Bad oil leaks into the clutch housing occured and slight leaks from the engine front past the oil retainer. This is a general trouble with these engines, and is receiving full investigation. Cylinder Head LOP.EH.1011. The engine was good for freedom from detonation, and could if necessary be run on the cheaper grade "Tourisme" petrol, although "Esso" was used as a rule. The engine has been re-built for further test with an improved head with better water spacing round the exhaust seats. Valves and fittings LOP.EH.917. Ex.27760 Inlet valves S.62. L.61299. Exhaust valves AL.965. 6 - Rs.{Sir Henry Royce's Secretary}540 Valve springs produced in Swedish wire at R.R. 6 - Rs.{Sir Henry Royce's Secretary}540 Valve springs produced in Standard E/V.{VIENNA} at R.R. The valve gear was generally noisy. This was attributed to the camshaft. A quieter valve gear has been obtained on two other engines with different camshafts having longer toes. Individual tappets came up badly at times, and the standard of idling varied during the running. These troubles indicated sticking exhaust valves. There were signs of picking up on the stems. The trouble is not considered serious apart from verifying that the clearances in the guides are correct. | ||