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Toe-in settings and tyre wear for Wraith and Phantom III models.


Identifier  ExFiles\Box 158\2\  scan0053
Date  11th August 1939
  
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Da {Bernard Day - Chassis Design} /DB. {Donald Bastow - Suspensions} 6/G.11.8.39.

Toe-in previously allowed on Wraith has been 1/4" + 1/8", only occasional ones being as much as 3/8". The official figure for Phantom III is 3/16" + 1/8", but here again occasional ones have been passed out at 3/8". Increase of toe-in with bump and rebound is appreciably less on Phantom III than on Wraith.

It would be interesting to obtain comparative figures of tyre wear for zero and 3/8" toe-in; is there any possibility of getting such figures from trials cars?

Apart from Dawtrey's remarks, suggesting that Standards have been troubled by excessive front tyre wear, I know that Daimlers have had it on the 2 1/2 litre independent front suspension car, and I believe that other firms have also had it, including Humbers.

Da {Bernard Day - Chassis Design} /DB. {Donald Bastow - Suspensions}
DB {Donald Bastow - Suspensions}
  
  
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).


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