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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).
45HP double top gearbox conversion to an electrically controlled friction type.

Identifier  ExFiles\Box 15\5\  Scan207
Date  28th May 1931
  
X/310
HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce}
BY.{R.W. Bailey - Chief Engineer} }
?
C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager}
C. to HY.{Tom Haldenby - Plant Engineer} RHC.{R. H. Coverley - Production Engineer}
45HP. - DOUBLE TOP.
R11/M28.5.31.
X.7310.
X.523.

This should be ready for converting to
electrically controlled friction type in the present
box in the course of a few days. It promises to be
simple and robust, and workable with a two speed box;
-if good we can redesign much simpler and lighter.

R.{Sir Henry Royce}
  
  


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