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 report on the comparative performance of old and new Phantom III oil coolers under pulsating pressure.
| Identifier | ExFiles\Box 131\5\ scan0053 | |
| Date | 10th January 1938 | |
| To Rm.{William Robotham - Chief Engineer} from HPS{Horace Percy Smith - Experimental Factory Mgr}/W.Bell. c. Rm{William Robotham - Chief Engineer}/Std. HPS{Horace Percy Smith - Experimental Factory Mgr}/WB.{Mr Brazier/Mr Bell}1/CB.10.1.38. PHANTOM III OIL COOLER TESTS. LLC.4871. Tests were carried out in conjunction with the instructions Rm{William Robotham - Chief Engineer}/Std.2/AP.12.10.37, on an old and a new oil cooler. These coolers, connected in parallel, were subjected to a pulsating pressure of 150 lb./sq.in. (generated by a shock damper) at 175 pulsations per min. for 3 minutes, and were found to be sound. They were then run for a further 3 minutes at 200 lb./ sq.in. pressure, and on examination, it was found that the old cooler had distorted slightly along one of its sides. The new cooler was unaffected. The coolers were replaced and run on an endurance test at 200 lb./sq;in. at 175 pulsations per min. After 17 minutes (2975 pulsations) the old cooler showed signs of leakage. The new cooler leaked after 40 minutes running (7000 pulsations). The location of the "bulging" and ultimate failure is illustrated in the attached diagram. HPS{Horace Percy Smith - Experimental Factory Mgr}/W.Bell. | ||