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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).
Cause of torsion in the front horns and evaluating a proposed solution.

Identifier  ExFiles\Box 75\3\  scan0259
Date  10th February 1913 guessed
  
-4-

at the point where the cross member
is fitted. This is increased owing to
the fact that the back end of the spring
is anchored rather securely from side
movement, with the result that the front
end of the spring tends to move further
sideways than it otherwise would do.
(the springs possibly swivelling on their
seatings). I think it is very possible
that this is the real cause of the
torsion in the front horns and is more
dangerous than the torsion due to
turning a corner, owing to the fact that
it is constantly reversing in direction
owing to first one wheel rising and
then the other.

Mr Spinney's suggestion of
increasing the length of the tube 1/10"
will not increase the strength of the
member to any appreciable extent but
  
  


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