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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 its effect on steering effort for different axle types.

Identifier  ExFiles\Box 12\1\  01-page038
Date  22th September 1926
  
Attached to:-

Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/T22.9.26.

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 from 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 lbs.
C2 (New axle) | 2° 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.
  
  


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