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).
The unreliability of the oil cooler and tests to decide on its deletion from cars with specific bearings.
| Identifier | ExFiles\Box 107\2\ scan0132 | |
| Date | 27th May 1938 | |
| Ry. from Rm.{William Robotham - Chief Engineer} eg. HS.{Lord Ernest Hives - Chair} DR. MTC. MX.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}/GNR. Rml/R.27.5.38. Since the oil cooler has proved itself to be a very unreliable accessory, these tests were undertaken to see whether:- (a) we could abandon it with present production cars having aluminium tin alloy big-end bearings with or without overdrive gearboxes. (b) Whether it can be dispensed with on all cars prior to the introduction of the tin bearings. [handwritten] aluminium As a result of the test, we are issuing a standardisation sheet for the deletion of the oil cooler on all cars having aluminium tin big-end bearings. It seems doubtful whether we can get rid of the oil cooler where aluminium tin bearings are not fitted. However, further bench tests will, in due course, be carried out, upon which a final decision will be taken. Rm.{William Robotham - Chief Engineer} | ||