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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).
Instruction to modify and test a flywheel by increasing the number of securing bolts from 6 to 9.

Identifier  ExFiles\Box 13\7\  07-page095
Date  10th March 1931
  
X7300
BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer}
E1/M10.3.31.
C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} P. 2. CRANKSHAFT & FLYWHEEL.
X.7010.
X.7300.
In accordance with R1/M7.3.31. and E1/M27.2.31. would you please instruct LeC. 2874 with 9 bolts securing the flywheel instead of 6., using the present bolt diameter so that the efect of 6 and 9 can be tested separately.
E.{Mr Elliott - Chief Engineer}
  
  


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