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 the Phantom III oil cooler.
| Identifier | ExFiles\Box 131\5\ scan0073 | |
| Date | 29th April 1938 | |
| PHANTOM III OIL COOLER FATIGUE TESTS. Reported in Rm.{William Robotham - Chief Engineer}6/R.13.1.38. & HP?/B.1/GB.10.1.38. (1) Test on original R.R. made cooler Failed after 297) pulsations (2) Test on Marston P type cooler (10.1.38) Failed after 7000 pulsations. (3) Test on Marston P type cooler (29.4.38) Failed after 21,150 " (4) Test on Marston P type cooler (second one 29.4.38.) Failed after 19,400 ********** Note. In each of the above tests, a pulsation consisted of raising internal pressure of cooler to 200 lbs.sq.in. and then letting it down to atmospheric pressure, and by means of a shock absorber (175 pulsations/minute). Further test on Marston P type cooler as above but using internal pressure of 100 lbs.sq.in - failed after 100,300 pulsations. | ||