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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).
From Hs. to CJ. defining 'unstable' steering and the role of springs in the connecting tube.

Identifier  ExFiles\Box 106\3\  scan0011
Date  29th June 1925
  
X5430

To CJ. from Hs.{Lord Ernest Hives - Chair}

Hs{Lord Ernest Hives - Chair}4/LG29.6.25.

STEERING. X. 5430

With reference to penciled note attached.
The complaint of the steering should read 'unstable'.
This term is, as a rule, used when there is difficulty
in keeping the car on a straight course at high speeds.

On all steerings there are springs in the
connecting tube between the steering gear and the
front axle. In order to avoid shocks being transmitted
to the steering wheel over bad roads, we like these
springs to be as weak as possible - on the other hand,
when they are weak, it will be found that to steer
the car, the steering wheel is turned through several
degrees before the road wheels answer owing to the
compression of the springs in the connecting tube.

It is this effect which we term 'unstable'.

Hs.{Lord Ernest Hives - Chair}
  
  


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