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).
Gearbox testing, focusing on gear disengagement issues and comparing different gearbox models.
| Identifier | ExFiles\Box 6\4\ 04-page098 | |
| Date | 17th March 1925 | |
| R.R. exhs (500) (D.R. 17) 25-9-34) J.H.D. EXPERIMENTAL REPORT -2- Exptl. No. REF Hs{Lord Ernest Hives - Chair}4/LG17.3.25. smallest amount of torque being transmitted. The torque is so small that we cannot measure it on the road wheels. This would suggest that it is not deflection which is the cause of the gear working out under that condition. Once we have a gear in which there is no tendency to work out, it is impossible by pulling on the change speed gear lever to pull it out of gear when a reasonable load is being transmitted. We are hoping soon to have some more 4-speed boxes completed so that we can confirm these results. Up to the present all our tests have been made on one box. The gears on which we have been carrying out the tests with the torsionally free pinions have been ground; it is a long process to produce gears and to send them outside to be ground. The tendency for the gears to work out on the latest 'India' 4-speed box does not appear to be any worse than the 40/50 box which we have been using for years without any trouble. Hs.{Lord Ernest Hives - Chair} | ||