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).
Requesting fatigue tests on broken spring plates from two different suppliers to determine the best range to resist fatigue.
| Identifier | ExFiles\Box 54\3\ Scan145 | |
| Date | 25th September 1924 | |
| U.W. X2628 c. Hs.{Lord Ernest Hives - Chair} BYS/H.{Arthur M. Hanbury - Head Complaints} 25.9.24. I wish to have a series of Upton Lewis Tests carried out on the broken top plates taken from Messrs Firths and Woodhead's springs (front). Hs.{Lord Ernest Hives - Chair} will hand over to you one or two broken top plates from which you can have machined the necessary test pieces for the Upton Lewis Machine. The Front Springs from which the broken top plates are to be taken are in each case 12 1/2% stronger springs. The tests I wish to have carried out are:- 1. Two Upton Lewis tests from both Woodheads' and Firths' Plates ground to the same dimensions in the "as received" condition. 2. I wish to have pieces of steel from Firths' springs re-treated to cover Brinell ranges from 418 to 369. The object of the test is to demonstrate clearly whether the Brinell figure we are working to on the Chrome Vanadium spring made by Firths, namely, 386 to 415, is the best range to resist fatigue. If we have any other information available on this subject, which I believe is actually the case, this information should be looked up and put forward in a general report. BY.{R.W. Bailey - Chief Engineer} By | ||