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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).
Test report on wobbles observed in a Delage car under different tyre pressures.

Identifier  ExFiles\Box 28\4\  Scan201
Date  9th November 1922
  
Mr. Hives from GWH.{George W. Hancock - Head Chateauroux}
X.3525 X457
9.11.22.
TESTS ON DELAGE CAR FOR WOBBLES. X.3525

Tests were carried out on this car in the condition as it arrived. Wobbles could be obtained at a speed of 22 k.m.hr. but were not of a violent order now could they be kept for any considerable distance. After having the front tyre pressure increased to 60 lbs., wobbles of a fairly violent nature could be got easy and could be kept up for considerable distances.
The wobbles were kept up to a speed of 42 k.m.h when they quickly disappeared.
The speed of the wobble will be checked.
GWH.{George W. Hancock - Head Chateauroux}
  
  


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