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).
Analysis of a pin fracture and a proposal to increase the core strength of the part for future production.
| Identifier | ExFiles\Box 88\1\ scan0120 | |
| Date | 17th December 1934 | |
| - 2 - to definitely state what the fracture has been is due to. Personally, I am inclined to think that the axle has had a bump, and when the whole axle becomes available for examination we may be able to find evidence to bear out this point which is based, not on a guess in the dark, but on certain conditions of the fracture on the lower part of the pin. I find that at the commencement of 'C' series the dimensions of the pin, where it passes through the main axle, were modified, so that the strength of the pin was increased approximately 25%. The upper portion of the pin, however, did not participate in the strengthening, as it was very much more difficult to obtain an addition of metal at this point. We would suggest that in addition to the increased dimension, it would be desirable to make the pins in the future from S.Z.N.C.R. which would give us at least a 50% increase in core strength of the part in question. BY.{R.W. Bailey - Chief Engineer} | ||