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).
Comparison of engine oil suction systems with diagrams for the SS and Phantom chassis.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan128 | |
| Date | 7th February 1929 guessed | |
| (2) [Handwritten Annotation:] Derby yours [Typed Text:] From the other results we give we think the communication holes must be about right but an open bottom half test would confirm this. The Arrol Aster engine is fitted with leather flap valves over the holes through the cross webs but we do not want to propose anything of this nature. ==================== The next question (which perhaps should have been the first) is why is this trouble not complained of on the Phantom and India chassis. The base chambers of these chassis are no better but rather worse than SS.{S. Smith} for uncovering the oil suction ports under the conditions discussed. The 3 systems compared are as follows: FIG I - SS{S. Smith} PUMP FIG II - PHANTOM PUMP | ||