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).
Heat treatment tests performed on a connecting rod to investigate a growing effect.
| Identifier | ExFiles\Box 100\3\ scan0107 | |
| Date | 24th March 1939 | |
| To: By... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}37/N.24.3.39. Re: Test on Connecting Rod. We have carried out your suggested test with a connecting rod to see whether we could reproduce the growing effect. (1) The rod was left for four weeks on top of the boiler at an approx. temp: of 80°C. The measurement of the bore checked by two inspectors before the test was 2.002. After the heat treatment the measurement was 2.000. (2) The rod was then heated up gradually in water to 100°C. and allowed to cool gradually. This was repeated five times. The measurement remained exactly the same. (3) A further heating up in water to 100°C. and allowed to remain at this temperature for three hours, then gradually cooled down, has not produced any growth of the metal. Will you please say whether there is any further test that could be carried out. We have not any means here of getting higher temperatures to be relied upon. GWH.{George W. Hancock - Head Chateauroux} | ||