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).
Oil flow tests within a multi-compartment system after modifications to hole sizes.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page191 | |
| Date | 2nd February 1933 | |
| X4087. Hotel de France, CHATEAUROUX, Indre, France. 2.2.33. To H.S. c. H.{Arthur M. Hanbury - Head Complaints} 3 PER. 11. We found after refitting the bottom half with the hole in the rear web reduced to .500 and the hole in the front web reduced to .500, that all the release oil was building up into the two front compartments leaving the rear compartment practically dry. This feature still remained with the oil temperature at 70° c. We have therefore had again to dismantle the bottom half. We have proved that it is wrong to reduce the holes in the partitions, especially the one adjuncent to the filter. We carried out the following tests to prove this. 1. We poured oil into the front compartment, the oil being at a temperature of 60°. The flow through the to the front web was very slow and it took some considerable time before oil passed into the centre compartment and then into the rear compartment. The release oil being discharged into the front compartment is similar to our pouring the oil into the front compartment. 2. The oil being level in each compartment, we raised the rear end of the bottom half rather quickly, the result was that the oil flowed very rapidly over the tops of the weirs, the amount going through the partition holes being very small. Upon levelling the bottom half the centre compartment filled up fairly quickly, but considerable time was taken to fill the rear compartment. We therefore came to the conclusion that the hole in the rear partition should be enlarged. We therefore opened out the hole in the rear partition to .6675; the hole in the front partition we opened out to .750. Again applying the above oil test the rear compartment filled up much more rapidly, but there still was a quantity of oil shot over the tops of the weirs when we lifted the | ||