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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).
Modifications for the Wraith III back axle, applying features from the Phantom III axle.

Identifier  ExFiles\Box 7\3\  X 602 Axle Rear-page36
Date  22th March 1937
  
SECRET. 602. [Signature]

EFM
c.-S. Da.{Bernard Day - Chassis Design} Fm.NBS. E/EV.{Ivan Evernden - coachwork}

E/HDY.{William Hardy}2/NP.22.3.37.

Wraith III Back Axle.

We send herewith N.Sch.5090 showing a combined filling plug and level stick and a simplified vent (as already shown on N.Sch.4954 for the Wraith axle with 1.625" hypoid) applied to the Phantom III axle for use on the Wraith.

These modifications should be introduced at the first convenient opportunity. It is not essential that they should be fitted to the first Wraith III.

N.Sch.5090 herewith.

E/HDY.{William Hardy}
  
  


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