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).
Fatigue test results for a standard crankcase alloy using an Upton Lewis machine.
| Identifier | ExFiles\Box 37\4\ scan 120 | |
| Date | 12th June 1917 | |
| Upton Lewis Machine Test No: 3 Mark: C Date: 12-6-17 Material: Crankcase Metal State: Section: 1" x 1/4 Dist. Between Jaws: 1/4" Throw of Crank: 3/16" Speed R.P.M.: 106 Springs: 0 Total No of Revs: 32 / 22100 Standard Crankcase Alloy, Containing 8% of Copper, 12% of Zinc, & The Rest Aluminium. Handwritten Note: 2 SAMPLES MARKED "C" FAILED AFTER 22,100 REVS J.G. 13.6.17 | ||