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).
Material, heat treatment, and testing of piston pins due to an urgent matter of repeated failures.
| Identifier | ExFiles\Box 10\1\ 01-page67 | |
| Date | 15th November 1927 | |
| Hs.{Lord Ernest Hives - Chair} RG.{Mr Rowledge} BY.{R.W. Bailey - Chief Engineer} c. to EW. Wor.{Arthur Wormald - General Works Manager} from R.{Sir Henry Royce} 4685 R2/M15.11.27. PISTON PINS - ALL ENGINES. X.3996 X.685 I very definitely believe we ought to make piston pins of high duty alloy steel, and heat treat to the hardest brinell that will give us good fatigue values for a given load, not for a given deflection - stanton test, not Upton-Lewis. Please make a set for the most severe test - high comp: thin section. No. RR. R.{Sir Henry Royce} engine should go out with the pins which have now twice failed. Those out should be changed as soon as we decide which is best ( a very urgent matter.) R.{Sir Henry Royce} | ||