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).
Proposal to correct steering geometry issues by testing a new pendulum lever, rockershaft, and articulated side steering tube.
| Identifier | ExFiles\Box 106\3\ scan0343 | |
| Date | 26th October 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/KW. 26.10.35. We have yet to try the following :- (a) Standard length pendulum lever on the gear with reduced helix, which will make the ratio the same as that of the Marles L.7 gear as recently on Wor{Arthur Wormald - General Works Manager}'s car. (b) Rockershaft with increased torsional stiffness. We propose to try these in the above order and 21-G-IV is at present in the shop to have modification (a) above fitted. With the low helix angle and long pendulum lever there is distinct evidence of bad geometry in the form of slight oversteering on right-hand corners and wandering to the right on a hump-backed bridge. It is impossible to say if any of the joggling is due to geometry and as the geometry is still imperfect with the standard lever we suggest that we should try an articulated side steering tube with an intermediate pendulum lever just in front of the rear shackle of the front spring. This should give perfect geometry. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||