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).
Query regarding the production possibility of reducing the weight of large inlet valves by drilling a hole in the stem.
| Identifier | ExFiles\Box 17\6\ Scan130 | |
| Date | 24th August 1933 | |
| RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Std. x7060. Hs{Lord Ernest Hives - Chair}/Std.9/MA.24.8.33. We should like your opinion on the production possibilities of reducing the weight of E.83904 P.II large inlet valves by drilling a hole (.230" in diameter) from the end of stem opposite to valve head (the hole to extend the length of the parallel portion of stem), and fitting a hardened steel cap - in a similar manner to the machining of sodium cooled valves. This proceeding would be quite safe from a stress point of view, but we are interested in machining costs,difficulties etc. Hs{Lord Ernest Hives - Chair}/Std. | ||