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).
Proposal to change the material for gudgeon pins and the associated concerns regarding wear and hardness.
Identifier | ExFiles\Box 66\1\ scan0169 | |
Date | 21th March 1928 | |
Hs.{Lord Ernest Hives - Chair} C Way 48040? BY8/G.21.3.28. MATERIAL FOR GUDGEON PINS. In view of R2/M.15.3.28. and to empower me to put R's proposal into force, would you kindly issue a standardisation sheet for both chassis, changing the material for gudgeon pins from C.H.N.S. to spring tempered Silico Manganese. The question of wear is of course an important one, and personally I do not feel that we should make a sudden jump on the chassis unless we are fairly sure that the wear will not be abnormal due to the reduction in hardness of the material. The case-hardened material gives a surface approximately 577 brinell, whereas we should be working on a brinell of about 400. BY.{R.W. Bailey - Chief Engineer} By | ||