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).
Instruction specifying the heat treatment for crank forgings to a Brinell hardness of 241-269.
Identifier | ExFiles\Box 132\2\ scan0165 | |
Date | 5th April 1940 | |
To HPS{Horace Percy Smith - Experimental Factory Mgr} C. to HPS{Horace Percy Smith - Experimental Factory Mgr}/HH M11b Rm{William Robotham - Chief Engineer}/CTS{C. Trot Salt - Carburation}1/CK{Mr Clark} 5.4.40 Crankshafts Will you please see that any further available crank forgings for chassis work are from henceforth heat treated to 241-269 Brinell. Rm{William Robotham - Chief Engineer}/CTS{C. Trot Salt - Carburation} | ||