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).
Friction requirements and load adjustments for the cross steering tube.
| Identifier | ExFiles\Box 67\3\ scan0006 | |
| Date | 28th September 1926 | |
| To Hs.{Lord Ernest Hives - Chair} from RM.{William Robotham - Chief Engineer} X8405 / Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG28.9.26. FRICTION IN CROSS STEERING TUBE. We find that in order to provide the necessary friction in the steering for balloon tyres as fitted up on 12-EX, we require a load of 1250 lbs. on each ball end of the cross steering tube. By a slight XXXXXX enlargement of the cross steering tube balls we can obtain two-thirds this amount without subjecting the pads to higher unit loads than those in the side steering tube. We suggest that the remainder could be obtained by enlarging the side steering tube balls. We feel howver that the unit loads in the XXXXX cross steering tube could be made higher now that we have an arrangement for taking up wear in the cross steering tube automatically. We notice that in N.sch.2067 the load on the side steering tube ball has been reduced to 110 lbs. This is rather the reverse of what we consider to be the best compromise at the moment as we need every available portion of friction in the steering. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||