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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).
New arrangement of a side steering tube with spring-based shock absorption.

Identifier  ExFiles\Box 17\3\  Scan050
Date  21th August 1926 guessed
  
contd :-

-3-

New arrangement of side steering tube.

We have arranged a side steering tube to give an initial set up as you suggested some time ago. In the new arrangement of side steering tube springs, the steering wheel is cushioned in both directions from road shocks by one spring at either end but the springs are arranged so that they have a fixed initial load. Thus the steering is positive until the load in the side steering tube exceeds the spring set up. Once this fixed amount is exceeded, the springs being of low rating, deflect very rapidly and have a large free movement. Therefore, while the fixed load allows the car to be steered and controlled to the best advantage, under ordinary conditions, the very low rating side steering tube springs which can consequently be employed enable large road shocks to be absorbed completely.

On the road we tested a number of combinations of springs and set-ups, and while we could xxx not obtain with the springs at our disposal what we consider would have been the optimum arrangement, the attached graph (B.) gives the loading which we found to be the most satisfactory. Actually it will be seen that the effective rating of the springs employed was only 750 lbs. We consider that this was sufficiently near the best arrangement to be a reliable guide as to the characteristics to be expected.

We found that on good roads at all speeds, this side steering tube is on the whole inferior to the standard arrangement because it transmits more little steering wheel movements to the drivers hands. Naturally, these little contd :-
  
  


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