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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).
Technical description of the steering system, road springs, and associated components.

Identifier  ExFiles\Box 42\2\  Scan085
Date  18th September 1922 guessed
  
R

forces exerted upon the steering gear through rough roads, soft borders to roads, and deflated tyres. The road wheel hubs have extra provision to render them oil retaining, and water and mud excluding.

The attachment of the road springs (patented) is carried out in a unique manner by the use of a steel sheath which fits keys formed on the axle, transmitting the shocks directly from the axle to the upper plate of the spring to reduce the tendency to shear the central bolty.
The steering arms are attached by the patented RR. system used in the larger chassis.

(J). STEERING.

The steering is by worm and nut as in the larger RR. chassis. The klaxon,ignition,and throttle controls are placed on and above the steering wheel as in RR, practice (but the ignition switch and mixture control are on the instrument board.) The longitudinal steering tube is fitted with set-up spring buffers to reduce the force of the shocks reaching the steering box. The well proportioned steering wheel is notched and covered with black non-conducting covering (including the spokes) so that the steer-ing wheel is pleasant and clean to handle, and has a handsome appear-ance. The thrust bearing is easily adjustable being on the steering column, The steering joints are of RR. (patent) design easily adjustable, and all parts of the bearing being firmly locked after adjustment, so that the blocks do not knock about and become loose in their housing (a unique feature.) It is fitted in two standard positions known as "B" for chauffeur driving, and "D" for owner driving - the latter is for bodies not exceeding 4 seats.

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