Rolls-Royce Archives
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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 design of a new back axle and rear brakes for the J.3. project.

Identifier  ExFiles\Box 102\4\  scan0077
Date  28th March 1931
  
DA.{Bernard Day - Chassis Design} ) FROM R.{Sir Henry Royce} R2/M28. 28.3.31.
BY.{R.W. Bailey - Chief Engineer} )
C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} J.{Mr Johnson W.M.} 3. BACK AXLE.

When we are introducing a new back axle on J.{Mr Johnson W.M.} 3.
I think we ought to make it of the minimum diameter possible for a given bevel wheel, so that it will enable the rear seats to be as low as possible.
(DA.{Bernard Day - Chassis Design} has done this and sent it to Derby.)

The back axle tubes proposed do not embody a
good combination of parts for minimum cost. I have suggest-
ed{J. L. Edwards} to DA.{Bernard Day - Chassis Design} an entirely new treatment which he will send to
BY.{R.W. Bailey - Chief Engineer} this week.

In J.{Mr Johnson W.M.} 3. we have to modify the rear brakes so
that they will not increase the dimensions of the wheel
arch.

R.{Sir Henry Royce}
  
  


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