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).
Production and testing of forged-to-size connecting rods.
| Identifier | ExFiles\Box 161a\3\ scan0083 | |
| Date | 25th March 1939 | |
| 1381 also 1119 To RHC.{R. H. Coverley - Production Engineer} from Rm.{William Robotham - Chief Engineer} c. By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer}4/MH.{M. Huckerby}25.3.39. FORGED TO SIZE CONNECTING RODS. With reference to By.28/N.21.3.39, coined connecting rods, if as we understand, the dies have not yet been started on, we should like to have a discussion as to what size it will be made. As we see it, unless we can get a rod which requires no machining and does not weigh appreciably more than our present fully machined rod, the experiment is not of much value. Rods which we ran in France were admitted to be faulty forgings by everyone but yet they successfully passed a standardisation test. We can never recollect having a rod failure which was not caused by bearing seizure since the inception of the Bentley. We have over-stressed the rods to the extent of running them 24 hours at an output of 165 horse power. Rm.{William Robotham - Chief Engineer} | ||