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Suggesting design improvements and alternatives for E.A.C. magneto fabric couplings.


Identifier  WestWitteringFiles\L\Jan1924-March1924\  Scan104
Date  8th February 1924
  
TO E. {Mr Elliott - Chief Engineer} RG {Mr Rowledge} } FROM R. {Sir Henry Royce}
DA {Bernard Day - Chassis Design}
SECRET.
R1/M8.2.24.
Copy to - CJ. HS. {Lord Ernest Hives - Chair}
re. E. {Mr Elliott - Chief Engineer} A. {Mr Adams} C. MAGNETO. FABRIC COUPLINGS. X9790 X9100
These seem OK. but I should like to point out -
(1) That you should use a really strong and large fabric on the engine side of the dynamo be-cause there may be great stress spannering the ad-justable coupling.
(2) The adjustable coupling might be made less expensively by -
[Diagram of a coupling]
2 discs of sheet steel - 1 serra-ted right through the other smaller for cramping. Riveted together to form one piece.
Friction of nut assumed to be sufficient for over-run. Check plate could be used for nut.
This admits of parallel serrations.
Another idea is to use cone fit and fric-tion of plain cone.
The parallel job described above might be the cheapest and most satisfactory.
R. {Sir Henry Royce}
  
  
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).


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