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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).
Effects of weaker side steering tube springs on vehicle steering and handling.

Identifier  ExFiles\Box 68\1\  scan0149
Date  10th July 1926
  
From" Ps" (Private)
To " Hs{Lord Ernest Hives - Chair}".Derby

48450

Ps/JP.10/7/26

RE: SIDE STEERING TUBE SPRINGS

Your memo Hs{Lord Ernest Hives - Chair}2/LGS726 to hand.

I am of the opinion that the weaker S.S.T. springs improve the steering 60 %. We have only treated two cars in this way:

18-MC Paris open Trials,
36-LC Marquis Del Llano,

In both instances there is a decided improvement.

Lighter springs do not overcome joggles, but reduce their intensity. The shocks are less violent over uneven roads. The sudden snatches which the wheel gives with the stronger springs form the unpleasantness experienced, and my opinion is that customers do not, and will not complain so much of the wheel dancing if they can hold it and weaker springs permit this.

Reduction of selectivity is noticed, especially when taking bends at high speeds, but a prudent diver will never place himself in a position to render this dangerous. The advantages outway considerably the disadvantage.

In the case of 36-LC, both driver and owner have found a great improvement.

I will keep you posted of results of other cars,

I am working on this week.

Ps.
  
  


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