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).
Request to conduct a pressure 'test to destruction' on converted Ph.III oil coolers compared to standard production models.
| Identifier | ExFiles\Box 131\1\ scan0346 | |
| Date | 12th October 1937 | |
| To HPS{Horace Percy Smith - Experimental Factory Mgr}/W.Bell. from Rm{William Robotham - Chief Engineer}/Std. 1114 Rm{William Robotham - Chief Engineer}/Std.2/AP.12.10.37. We wish to test out a number of converted Ph.III. oil coolers shortly, in comparison with the standard dip-soldered type. We will hand you these converted coolers (7 in all) together with two standard production coolers. The test which we wish to make is to raise the internal pressure of the coolers to 200 lbs/sq.in. and then drop it to 0 lbs/sq.in. repeating this process for a large number of times. We have previously carried out this test on two standard coolers and they have successfully withstood this pressure 500 times - however, we would like to get a 'test to destruction' figure on both the standard coolers and the converted ones. Will you therefore please connect up three coolers in parallel to a shock damper whose valve setting has been modified to give a max. cylinder pressure of 200 lbs/sq.in. with a pressure gauge to register pressure in the system, and use the shock damper to pressure test these coolers, in batches of three, as outlined above. We require to know the number of pressure rises which each cooler withstands before failure. Rm{William Robotham - Chief Engineer}/Std. | ||