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).
Longitudinal flaw in a connecting rod due to forging the metal when too cold.
| Identifier | ExFiles\Box 42\2\ Scan011 | |
| Date | 3rd April 1918 | |
| X.3280 To R.{Sir Henry Royce} from EH. c.c. to CJ. c.c. to E.{Mr Elliott - Chief Engineer} c.c. to BY.{R.W. Bailey - Chief Engineer} EHL/LG3.4.18. 3rd. April. 1918. RE - CONNECTING RODS. X.2750. X.3280. We have a good example of a longitudinal flaw in a connecting rod, due presumably to forging the metal when it is too cold. This rod was found by the inspectors some months ago. All rods have been carefully examined for similar flaws. We are sending specimen to Mr. Royce. From Mr. Hall's tests it appears that very little harm can be done to nickel steel due to heating it up at too high a temperature, as long as it is heat treated afterwards, so that flaws are more likely to be started by working it too cold. EH. | ||