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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).
Letter to Mr. Claude Johnson regarding gear cutting work by Pratt & Whitney, sheet 2.

Identifier  ExFiles\Box 137\5\  scan0064
Date  23th March 1921
  
Dy{F R Danby}10 - G 23321

March 23, 1921

Mr. Claude Johnson - Sheet 2.

The Pratt & Whitney Company are doing this work free of charge, as they are anxious to interest us in the use of these gears.

From the several very accurate measuring instruments which they have evolved, we have ascertained that the tooth spacing in the Maag system of gear cutting is considerably more regular than in the Brown & Sharpe system, but the results so far obtained have been disappointing.

Yours truly,

MO/G

ROLLS-ROYCE OF AMERICA, Inc.
Per M.{Mr Moon / Mr Moore} Olley

COPY
  
  


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