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).
Test report detailing the results of engagement and endurance tests on a gear mechanism under varying voltage conditions.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan010 | |
| Date | 20th August 1930 | |
| -3- KFC2/AD20.8.30 contd. Two corner jams occurred and engagement was rather noisy at times. (4b) This was a repetition of test (2) but with the supply voltage reduced approximately 10% below normal. In this case full engagement was not always effected with the consequence that in a number of cases the main switch contacts were not made. Corner jamming occurred about 6% of the times. (5a) This was a repetition of test (3) but with the voltage 10% above normal. In the complete number of 1200 trials there were 28 corner jams i.e. 2 1/4%. The noisiness of engagement was sometimes rather violent. With this higher voltage there was noted to be a tendency for the pinion to rotate against the flywheel ring (i.e. on the teaser current) without entering into gear. This occurred several times during this test. (6) After the above tests the pinion and wheel were removed and examined. The pinion was observed to be unappreciably affected. The flywheel gear teeth were burred on the engaging corners though not excessively, and it was considered that this was occasioned mainly by the high voltage engagement tests. It will be remembered that the pinion is rendered very hard by suitable treatment. (7) Endurance Test. In this test the gear was allowed to operate automatically (as before) for 20,000 starts in normal | ||