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).
Requesting comparative tests on two types of oil filters.
| Identifier | ExFiles\Box 135\3\ scan0303 | |
| Date | 18th August 1938 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} 1139 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}36/JH.18.8.38. OIL FILTERS. Will you please instruct for W.Bell to carry out comparative tests on his rig between the "frame" type of filter and the "General" both of which we will supply, also the dirty oil for testing same. The conditions under which the above should be tested to be similar to the previous tests taken some time ago when three or four different types were compared. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||