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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).
The J.3/J.2 & Peregrine front engine mounting, suggesting the use of thicker steel or drop forgings to reduce flexibility.

Identifier  ExFiles\Box 179b\1\  img068
Date  14th September 1932
  
HS.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce}
E )
BX )
C. TO SS.{S. Smith} WOR.{Arthur Wormald - General Works Manager}

R3/M14.9.32.
X5005.
X4027.

J.{Mr Johnson W.M.} 3. OR J.{Mr Johnson W.M.} 2. & PEREGRINE FRONT ENGINE MOUNTING.

This front engine mounting is remarkably neat and light, and I have come to the conclusion that serious changes in it are perhaps not desirable, and that it will be much better to remove the cause of the trouble than resist the undesirable forces which exist at present and must be reduced for other reasons.

I suggest we make it of thicker steel or even the parts most liable to flex of drop forgings if the heavier gauge pressings are still too flexible.

R.{Sir Henry Royce}
  
  


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