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 transverse pivot inclination and resultant steering effort for different axle types.
| Identifier | ExFiles\Box 95\1\ scan0429 | |
| Date | 22th September 1936 | |
| 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. First Table: 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) | 5° | .0382 | 3.65 lbs. V (New PhantomCodename for PHANTOM I) | 6° | .0532 | 4.56 " C2 (New axle) | 2° 30' | .015 | 1.15 " 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:- Second Table: 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 " C2 (New axle). | 1.44 " | ||