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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).
The weight and cost implications of half floating axles versus fully floating axles, and pressed wheels versus spoked wheels.

Identifier  ExFiles\Box 7\3\  X 602 Axle Rear-page25
Date  24th September 1936
  
-4- Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}16/Ks.24.9.36.

We realise that a half floating arrangement
will always weigh more than a fully floating axle, but
think the extra weight (due solely to the larger axle shafts)
is worth while to eliminate all slack. The saving in cost
will be about £1 per car, due to the absence of splines
connected with the wheel drivers.

If at any time we should use pressed instead
of spoked wheels, this can be done on a half floating axle
with a saving in weight of about 12 lbs. It should be
possible to retain such a wheel with one central nut.



Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}
  
  


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