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).
The effects of pivot pin slope and castor action on the steering of the EAC car.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan77 | |
| Date | 1st February 1924 | |
| R.R. 493A (40 H) (SL 12 12-7-23). J.H. D.{John DeLooze - Company Secretary} ORIGINAL 1st EAC ? EXPERIMENTAL REPORT. Expl. No. X9430 REF: Hs{Lord Ernest Hives - Chair}1/JMS.2.24. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. RG.{Mr Rowledge} c. to DA.{Bernard Day - Chassis Design} H.{Arthur M. Hanbury - Head Complaints} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} --------------------- S E C R E T. EAC. - STEERING. --------------------- We find, owing to the transverse slope of the pivot pins, that apart from the increase friction on the bearings due to this, it also tends to increase the castor action. THE FIRST ? We are running the EAC. car at the Works with vertical pivots and find that the steering is still self-centering. Reducing the lean on the pivots makes the steering lighter and also reduces the road shocks. Our previous tests have proved that excessive castoring increases the road shocks transmitted to the steering wheel when going over a bumpy road. Hs.{Lord Ernest Hives - Chair} | ||