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 design suggestions for the cross steering tube on a 12-EX car with balloon tyres.
| Identifier | ExFiles\Box 67\3\ scan0010 | |
| Date | 1st November 1926 | |
| To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X 8425 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LGE.11.26. FRICTION IN CROSS STEERING TUBE. +7425 With reference to DA{Bernard Day - Chassis Design}3/M30.10.26. The following is the note you request. We find that in order to provide the necessary friction in the steering for balloon tyres as fitted up on 12-EX car, we require a load of 1250 lbs. on each ball end of the cross steering tube. We think that a slight enlargement of the cross steering tube balls would enable us to obtain this load without subjecting the pads to higher unit loads than those in the side steering tube. We suggest that if convenient some extra friction could be obtained by making enlarging the side steering tube balls slightly. We feel however that the unit loads in the cross steering tube could be made higher now that we have an arrangement for taking up wear in the cross steering tube automatically. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||