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).
Tests on a reverse shaft, comparing results with and without plunger springs and using different forks.
| Identifier | ExFiles\Box 6\4\ 04-page071 | |
| Date | 19th February 1938 | |
| reverse shaft on test again, with the idea of confirming the success Mr Hives had had with this, and we found that by leaving out the plunger springs and using our force measuring apparatus, that we required the same load to hold in gear as obtained with the plain bearing reverse shaft (first two experiments), i.e. 12 lbs. We would ask you to note that the standard plunger springs give an end load of approx: 14 lbs. at the sliders, although we do not think the forks should be called upon to resist any end load, we suggest that perhaps in previous experiments where plunger springs have been used, that we might have been deceived by the gear staying in owing to the plungers having just sufficient power. On the other hand one test, we believe, was made on a reduced diameter reverse shaft with no plunger springs, and which required little or no load to hold the gear in, but this test was made with the cleared away forks, whereas the parallel reverse shaft test referred to above was made with the full faced forks. Further differences between other apparently successful tests with this shaft were a .375 hole through the middle and a detachable inner roller race. This latter feature we wished to be able to use successfully (if at any time it is decided that this shaft is the best), as we understand it is a little less costly and more reliable than producing a race in case hardening steel solid with the shaft. We suspect that the trouble with the coming out on this test was due to the full faced fork. We propose trying this | ||