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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 to the road wheels, nuts, and discs for a Bentley 50.

Identifier  ExFiles\Box 131\2\  scan0250
Date  25th August 1938
  
To ~~BY~~... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}
c. Rm.{William Robotham - Chief Engineer}

113.
Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}27/N.25.8.38.

[Initialed E H]

Bentley 50.
----------------

I have noticed that the road wheels are being held in position by studs and nuts. The nuts I notice have been designed so that they have to be fitted one end only. This is a calamity. To facilitate easy changing of wheels the nuts should be reversible. The inside thread should be cut away to allow a lead approximately 1/8" deep. The depth of the wheel brace socket for the nuts should allow the full depth of the nut and no more. This does away with the shoulder on the nuts I saw fitted.

The discs should be/held on by a central screw which can be undone by a penny or coin of similar size. The springing of the disc into position and getting off is a curse, many times a slight bump has destroyed its propositions.


Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}
[Signature GWH{George W. Hancock - Head Chateauroux}]

[Pencil sketch of a wheel nut and hub section]
  
  


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