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).
Design of exhaust and inlet valve guides for the Phantom Aluminium Head.
| Identifier | ExFiles\Box 65\4\ scan0385 | |
| Date | 23th March 1928 | |
| BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to BJ. Hs.{Lord Ernest Hives - Chair} X 8050 E2/M23.3.28. PHANTOM ALUMINIUM HEAD. X. 7060 Lec. 2464. X. 8050 X. 8060 X. 7050 X. 289 In reply to your BY8/G20.3.28., our requisition is founded on the EAC.14 and RR.F. practice of making the exhaust valve guide stouter, and we shew both a larger dia. at the top, and a slower taper. There is however much more projection of the exhaust guide on RR.F. than on EAC.10 or 14. from the protective aluminium boss, and hence there is reason for the EAC.10 valve guide to be of less heavy section, but I still feel it should not be as light as the inlet guide is shewn. Perhaps you could get HS{Lord Ernest Hives - Chair}' opinion on this. It seems to me the best idea would be to make the exhaust and inlet valve guides interchangeable at .750 dia. at top, and 1 in 20 taper. E.{Mr Elliott - Chief Engineer} | ||