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).
Concerns and tests regarding high-speed steering wobble on the EAC-V11 model.
| Identifier | ExFiles\Box 17\3\ Scan121 | |
| Date | 1st February 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} X7430 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG16. 2. 27. EAC-V11 STEERING. Y457 We are rather concerned with the steering of this car at high speeds. The steering is quite good on a level road, but on a road with mediocre surface, the car has a feeling that it would like to high speed wobble. The wobble does not build up but there is a very small criss cross movement of the axle which starts every time a rough portion of the road is encountered. We have tried as far as possible to re produce the geometry of the present C2. series Phantom by alteration to the pendulum lever and side steering tube. This has definitely affected an improvement but we are still not altogether satisfied with the high speed steering of the car. We are therefore making a test in which we are fitting exactly the same springs on this car as on the C2, series and so shall be able to reproduce the geometry which has previously given satisfaction. We attach a tabulated list which shews where EAC-V11 in its present form, differs from previous cars. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||