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).
Letter to the Wilcox-Rich Valve Corporation inquiring about American practices for exhaust valves and valve seats to prevent erosion.
| Identifier | ExFiles\Box 158\4\ scan0037 | |
| Date | 12th June 1936 | |
| X1360 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}18/KW. 12th June, 1936. Robert Jardine, Esq., The Wilcox-Rich Valve Corporation, Detroit, Michigan, U.S.A. Dear Jardine, We had a visit from Mr. Taub the other day which we much enjoyed. He seems to be very fortunate with his exhaust valves, as he uses a simple Silchrome Steel with no stelliting and no valve seat inserts. We ourselves, however, have bumped into exhaust valve seat erosion rather badly when running under high output conditions. We are running KE-965 valves stellited, against ordinary cast-iron, the specification for which is D.T.D.49.B. We are wondering what the latest American practice is on inserts, and should be very much obliged if you could tell us anything about this. We understand that some American manufacturers have had considerable success by putting chills in the vicinity of the valve seat when casting the head, with a view to raising the brinell at this point, and that this has helped them out of the trouble. Is this a fact ? We can say that so far we have not been able to produce any appreciable improvement by better cooling of the exhaust valve. Yours sincerely, FOR ROLLS-ROYCE LIMITED. | ||