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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).
Requesting an alteration to the tube thickness for the Bentley propeller shaft.

Identifier  ExFiles\Box 9\2\  02-page05
Date  30th November 1936
  
to test
GRY.{Shadwell Grylls} 637
EH.
c.c. H.Pa.{Mr Paterson} Rm.{William Robotham - Chief Engineer} ROY.{Sir Henry Royce} RHC{R. H. Coverley - Production Engineer}/HPS.{Horace Percy Smith - Experimental Factory Mgr}
E/HDY.{William Hardy}1/HP.30.11.36.
Bentley and Wraith Propeller Shafts.

Will you kindly alter the thickness of the tube for the Hardy Spicer type propeller shaft for the Bentley from .064 to .080 (14 SWG). The outside diameter remains unaltered.

The Wraith is to remain as instructed at .064".

The reason for this alteration is that the tube makers recommend the increased thickness and the suggestion is that as the Bentley shaft is likely to come on to production before the Wraith, it should be made from the thicker tube, but the Wraith should have the .064" tube as there will be ample time to test this thoroughly.

E/HDY.{William Hardy}
  
  


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