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).
Specifications for a clutch spring.

Identifier  ExFiles\Box 103\1\  scan0019
Date  1st March 1933 guessed
  
Hs{Lord Ernest Hives - Chair} 935
DIA OF WIRE .212
INSIDE DIA OF HELIX .762
7 WORKING COILS WITH AN EXTRA COIL GROUND
SQUARE EACH END) MAKING A TOTAL OF 9 COILS
LOAD AT 2.075 TO BE 264 lbs
FREE LENGTH 2.620 APPROX
CLUTCH SPRING J III
6 OFF
N SCH 3362
R=485
  
  


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