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).
Comparison of American plain carbon steel springs with chrome vanadium steel springs and English piano wire.
| Identifier | ExFiles\Box 88\4\ scan0058 | |
| Date | 5th May 1934 guessed | |
| -4- The resistance of the American plain carbon steel springs to running conditions, presumably the same as those which have caused the failure of the chrome vanadium steel springs, suggests that the American wire is superior. Mr. Harriot reminds us however, that a large number of tests made by the Experimental department on a belt driven Condor engine with various types of piano wire of English make and on chrome vanadium steel wire, showed the latter to be markedly superior. It is possible that the English piano wire used in the Experimental tests was affected by the presence of a decarburised surface, which, as we have said, was not found in the specimens taken from the American Springs. Hl. HR Photomicrographs Nos. Al,077/8 to BY.{R.W. Bailey - Chief Engineer} Remainder of springs returned to BY.{R.W. Bailey - Chief Engineer} | ||