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).
Adoption and testing of inserted exhaust valve seats.
| Identifier | ExFiles\Box 88\4\ scan0171 | |
| Date | 7th August 1936 | |
| Swdl.{Len H. Swindell} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}19/MJ.7.8.36. INSERTED EXHAUST VALVE SEATS. Sooner or later we shall have to come to inserts for our exhaust valves. The Tourist Trophy practice of today is the standard car of next year and as you will see from the attached paper, the Americans are already finding that they have to adopt this procedure. On the endurance test on the chilled valve seats we should be glad if you would run with three unstellited valves as well as three stellited to see whether stelliting has any bearing on the subject. We think that in any case we should experiment with some insert seats to see whether we can make them stay in or not on a cylinder head. Personally we favour the shrunk insert as shown in Fig.10 on the attached paper. We should be glad if you would instruct accordingly. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||