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 discussing case hardening steel and the effects of different fuels like Benzol and Ethyl on engine valves.
| Identifier | ExFiles\Box 158\5\ scan0105 | |
| Date | 25th December 1940 guessed | |
| time give the clearer port so earnestly sought after? The second item; I was case hardening a small piece of steel over a gas jet before being dipped in the powder, the steel became red hot very quickly but after the dipping I had to use the coal fire to get it hot enough to harden it. If an exhaust valve were so treated would it be less inclined to accept heat? Mr Cross of Bath says Benzol is a better anti knock fuel than Ethyl in a Rotary Valve Engine - and this is not so in a poppet valve engine, might this be because of the coating that exhaust valves get with an engine running on Ethyl? Yours faithfully M.G.A. Bedford. | ||