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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).
Tests conducted on tyres and dampers to eliminate wheel wobble.

Identifier  ExFiles\Box 29\1\  Scan176
Date  9th February 1926 guessed
  
contd :-
-2-
hydraulic dampers would cope with the wobbles set up by
these tyres. We then tried 7.25" tyres at 20 lbs/sq.in:
We found that we were unable to eliminate the wobbles produced
by these tyres. As a matter of fact the violence of the
wobbles was only slightly reduced by the dampers. This
confirms our previous experience with these particular tyres,
either the wobble is eliminated or it is present to a
violent degree. All the wheels in these tests were balanced
and the shock absorbers loading was 150 lbs. on the ball end
upwards, and 30 lbs. downwards.
We have yet to make careful comparative tests for
riding comfort. We still believe, however, that we shall
gain more from the reduced tyre pressures than we shall lose
from the heavy shock absorber damping employed.
We are trying to see to what extent the loading
employed can be reduced without decreasing the efficiency of
the dampers.

Hs{Lord Ernest Hives - Chair}/W.A.Robotham.
  
  


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