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).
Comparison of steering effort based on transverse pivot inclination for different car series and axle types.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan202 | |
| Date | 22th September 1926 | |
| Attached to:- TRANSVERSE PIVOT INCLINATION OVERALL STEERING EFFICIENCY ASSUMED AS 60% WHEN CALCULATING LOADS ON THE STEERING WHEEL RIM PIVOT ASSUMED VERTICAL IN LONGITUDINAL ELEVATION TO SIMPLIFY COMPARISON. Table 1: SERIES. | Inclination of king pins. | Pivot lift centre to full lock. | Resultant effort lifting car. Mean manual load. Centre to full lock. T (No F.W.B) | 5º | .0382 | 3.65 lbs. V (New PhantomCodename for PHANTOM I). | 6º | .0532 | 4.56 lbs. C2 (New axle) | 2º 30' | .015 | 1.15 lbs. Comparison of effect of transverse pivot inclination only, i.e. every axle assumed fitted to a "T" series car so that the car wt. and steering ratio remain a constant :- Table 2: Type of Axle. | Resultant effort lifting Car. Rim of the steering wheel. T (No F.W.B.) | 3.65 lbs. V (New PhantomCodename for PHANTOM I). | 5.13 lbs. C2 (New axle.) | 1.44 lbs. | ||