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).
Effect of friction and irreversibility in worm and nut steering components.
| Identifier | ExFiles\Box 67\4\ scan0279 | |
| Date | 22th March 1927 | |
| ЗИЭ +430 To OY. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c.c. to BY.{R.W. Bailey - Chief Engineer} c.c. to Hy.{Tom Haldenby - Plant Engineer} STEERING. X8430 X3682 We have read with interest your OY2/E31127. There is only one point to which we should like to draw your attention. In our Hs{Lord Ernest Hives - Chair}/RmL/LG7.2.27. we pointed out the effect of friction in the worm and nut as a palliative against joggles. We feel that it is possible to overdo the efficiency obtained on the worm and nut so that it becomes too irreversible with consequent increase of joggles and road shocks. We admit that a worm and nut is likely to attain this state of irreversibility in service in whatever condition it is turned out, but if initially a good bedding is obtained this should not occur for a considerable period. We suggest that you bear this fact in mind when producing highly efficient worms and nuts. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||