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).
Endurance test results for duralumin connecting rods and strengthened pistons.
| Identifier | ExFiles\Box 86\2\ scan0127 | |
| Date | 11th November 1933 guessed | |
| ENDURANCE ON DURALUMIN CONNECTING RODS (EX.12396). 6 hrs. 0 mins. at 4000 R.P.M. Full Throttle. 5 hrs. 0 mins. " 4250 " " 0 hrs. 50 mins. " 4500 " " 10 hrs. 30 mins. " 2500 " Light Load. 3 hrs. 30 mins. " 4500 " " Total Running Time = 25 hrs. 50 mins. ENDURANCE ON STRENGTHENED PISTONS LEC.3675. (SPECIAL HEAT TREATMENT, CHILLED FROM DIE). 2 hrs. 0 mins. at 4000 R.P.M. Full Throttle. 1 hrs. 40 mins. " 4250 " " 0 hrs. 10 mins. " 4500 " " 2 hrs. 15 mins. " 2500 " Light Load. 0 hrs. 45 mins. " 4500 " " TOTAL RUNNING TIME = 6 hrs. 50 mins. | ||