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).
Experiment for fitting radius rods to the EAC.3 chassis to provide parallel control.
| Identifier | ExFiles\Box 72\3\ scan0278 | |
| Date | 14th July 1924 | |
| 49421 To HS.{Lord Ernest Hives - Chair} from DA.{Bernard Day - Chassis Design} S E C R E T. DA{Bernard Day - Chassis Design}3/M14.7.24. EAC.3. X.9770 X.9240 X.9420 X.9421 Referring to the question of fitting radius rods to the EAC.3. chassis, to provide parallel control, as explained to you verbally yesterday, I am sure how far Mr. Royce has instructed you, but what he had in mind for the experiment was a ball end fitted into the same boss as was used for the original rod on EAC.3., but of course, with the ball turned upside down and made to such a length as to give you about 6" between the centre of the top plate of the spring and the ball centre, the object of this being to provide a job that could be quickly rigged up. The radius rod ends would be the same as originally instructed. The back end is much lower than the original radius rod, and a big plate would have to be bolted to the side of the frame with the ball end cantilevering off it to provide the back anchorage. As explained to you yesterday we think this back anchorage would be about on the present back spring eye centre. What we should like you to determine is whether when one side is bumped fully up and the other fully down, there is very objectionable twisting in the part of the front axle between the two spring pads. DA.{Bernard Day - Chassis Design} | ||