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 Phantom II clutch spring.

Identifier  ExFiles\Box 13\7\  07-page125
Date  17th June 1932
  
Hs{Lord Ernest Hives - Chair} 652
DIA OF WIRE .232 - 4 S.W.G
INSIDE DIA OF HELIX 1.000 ±5
8 WORKING COILS WITH HALF A COIL GROUND
SQUARE EACH END) MAKING A TOTAL OF 9 COILS
Ld) WHEN COMPRESSED TO 2.550 TO BE 253 lbs
+5 lbs
FREE LENGTH 3.380
R = 307 LBS/IN S = 76000 lbs/☐"/in
CLUTCH SPRING PII
ROLLS-ROYCE, LTD.
PRINT ROOM
JUN 17 1932
DERBY.
  
  


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