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).
Inspection report on engine components including valves, camshaft, and gears with backlash measurements.
| Identifier | ExFiles\Box 97\4\ scan0195 | |
| Date | 24th November 1938 | |
| - 5 - HPS.{Horace Percy Smith - Experimental Factory Mgr}6/VS.{J. Vickers}24.11.38. Valves and Fittings - continued. All top and bottom valve spring washers are badly marked on the face which contacts with the spring. Inlet Pipes. This section - to LOP.EB.3579 - is satisfactory. Carburetters. The above - produced by S.U. - are in good condition. Air Silencer. To LOP.EB.3523 - this is satisfactory. Camshaft. Produced to Ex.31550 incorporating cam forms to E.CD.681/2. The camshaft is very satisfactory, this also applies to the camwheel EW.1880/1 supplied by Attwaters. No cam balancer was fitted. The camshaft has been tested and found free from cracks. Dynamo Drive. To LOP.EW.1438 incorporating EW.1728 Driving Gear - general condition satisfactory. The gear shows slight markings from the camwheel but is otherwise good. Engine Gears. The following engine gear backlash figures have been obtained :- Between Crankshaft Pinion and Camwheel before Test .0005-.001. " " " " after " .0025. Between Camwheel & Dynamo Gear before test - .001-.0015. " " " after " - .00175. continued. | ||