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 condition of engine components including valves, cylinders, and gears after a test run.
| Identifier | ExFiles\Box 43\1\ Scan080 | |
| Date | 1st February 1925 | |
| R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF Hs{Lord Ernest Hives - Chair}/TAG/LG2. 2. 25. The valve colouring is - viz :- A light brown ring about .25" wide around the seating and the remainder up to the valve stem is a greyish green. The underside of the valves is rough, and the top sides smooth. Valve springs. See running report. Cylinders. For cylinder leaks see running report. The cylinder bores are O.K. There is very little carbon deposit on the cylinder heads. Pistons. Before the hand-starter was fitted, the gears etc. were treated with prussion-blue and then painted with Sozol (a special rust preventative) and then when it was received on test, BB. mineral oil was injected into the case. The above precaution was taken in view of our last experience with the hand-starter being rusted up after a long run. On this occasion, the gears when dismantled at the end of the test, were in an excellent condition. Timing Gears O.K. Crankshaft Brgs. O.K. Crankcase. O.K. Camshaft & Rockers. O.K. Hs{Lord Ernest Hives - Chair}/TAG. | ||