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).
Test results from an Upton Lewis Machine for a standard piston alloy, showing fracture points.
| Identifier | ExFiles\Box 37\4\ scan 118 | |
| Date | 12th June 1917 | |
| UPTON LEWIS MACHINE TEST No 1 MARK P1 DATE 12-6-17 MATERIAL: STANDARD PISTON METAL STATE: SECTION: 1" x 1/8" DIST BETWEEN JAWS: 5/8" THROW OF CRANK: 9/16" SPEED R.P.M: 106 SPRINGS: 9/16" 32 PER INCH TOTAL No OF REVS OF DIAGRAM: PRESENT STANDARD PISTON ALLOY CONTAINING 87% OF ALUMINIUM, 12% OF COPPER & LESS THAN 1/2% OF ZINC Stamp: ROLLS-ROYCE, LIMITED ORDER OFFICE 20 JUN. 1917 DEP. | ||